9.6 Dialog Controls and Common Controls

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Chapter Nine — Dialog Functions (continued)

9.6 Dialog Controls and Common Controls

9.6.1 Control Types

Dialog pages are essentially a collection of various Windows Common Controls and custom controls. This section covers the common controls and styles.

The appearance of common control varies between versions of Windows and may also change depending on the selected display theme.

The codes for window styles are placed into a style word and an extended style word. For example, WS_CAPTION tells Windows to add a caption to the window. These styles occupy the high word (16-bits) of the window style dword (32-bits) while the low word is reserved for bit related to the specific window or control. Style bits can be set for each control and for the containing dialog as part of the dialog resource.

For example:

The styles consist of WS_ items for defining the control style as a child window (of the dialog page), initially visible, with a border with adding a vertical scrollbar and as a tab stop within the dialog page. The LBS_ style belongs to the specific class “listbox” telling that control how to behave.

For the complete dialog:

STYLE DS_MODALFRAME | DS_3DLOOK | WS_POPUP | WS_VISIBLE | WS_CAPTION

In this case, three WS_ styles are from the same set expressing how the main dialog page (which is also the contain dialog) is to look and behave. The DS_ style expresses how the dialog manager should behave.

After a window or control has been created, some of the styles can be changed. Legato does not directly support access to the styles once set.

Styles break into two broad types: Windows window types and specific control styles. Window styles generally apply to all windows and deal with things like containing borders, shading and overall behavior with respect to interaction with other windows. To slightly complicate matters as Windows functionality has expanded over the years, extended styles have been added as a separate style word known as extended window styles. Their designators start with WS_EX_ prefix.

Styles are always ORed using the | operator.

9.6.2 Window Styles

Windows styles set many behaviors, some of which may conflict. For a complete discussion of styles and all style definitions, see MSDN. While these styles (amongst others) can be used on most any window, the columns “Dialog or Page” and “Control” can be used as a guide for best or typical use.

The table below is an overview of the window styles relevant to dialogs and controls:

Windows Definition	Bitwise Value	Dialog or Page	Control	Description
WS_BORDER	0x00800000	N	Y	The window is created with a thin-line border.
WS_CAPTION	0x00C00000	Y	N	The window has a title bar (includes the WS_BORDER style).
WS_CHILD	0x40000000	Y	Y	The window is a child window. A window with this style cannot have a menu bar. This style cannot be used with the WS_POPUP style.
WS_DISABLED	0x08000000	N	Y	The window is initially disabled. A disabled window cannot receive input from the user. To change this after a window has been created, use the ControlEnable or ControlDisable function.
WS_DLGFRAME	0x00400000	Y	N	The window has a border of a style typically used with dialog boxes. A window with this style cannot have a title bar.
WS_GROUP	0x00020000	N	Y	The window is the first control of a group of controls. The group consists of this first control and all controls defined after it, up to the next control with the WS_GROUP style. The first control in each group usually has the WS_TABSTOP style so that the user can move from group to group. The user can subsequently change the keyboard focus from one control in the group to the next control in the group by using the direction keys.
WS_HSCROLL	0x00100000	Y	Y	The window has a horizontal scrollbar.
WS_SYSMENU	0x00080000	Y	N	The window has a window menu on its title bar. The WS_CAPTION style must also be specified.
WS_TABSTOP	0x00010000	N	Y	The window is a control that can receive the keyboard focus when the user presses the TAB key. Pressing the TAB key changes the keyboard focus to the next control with the WS_TABSTOP style.
WS_VISIBLE	0x10000000	N	Y	The window is initially visible.
WS_VSCROLL	0x00200000	Y	Y	Adds a vertical scrollbar.

The relevant extended styles are as follows:

Windows Definition	Bitwise Value	Dialog or Page	Control	Description
WS_EX_ACCEPTFILES	0x00000010	Y	Y	The window accepts drag-drop files. There is no procedure for drop files.
WS_EX_APPWINDOW	0x00040000	Y	N	Forces a top-level window onto the taskbar when the window is visible.
WS_EX_CLIENTEDGE	0x00000200	Y	Y	The window has a border with a sunken edge.
WS_EX_CONTEXTHELP	0x00000400	Y	N	The title bar of the window includes a question mark. When the user clicks the question mark, the cursor changes to a question mark with a pointer.
WS_EX_DLGMODALFRAME	0x00000001	Y	N	The window has a double border; optionally, the window can be created with a title bar by specifying the WS_CAPTION style in the regular parameter. This is not generally used on property sheet pages.
WS_EX_STATICEDGE	0x00020000	Y	Y	The window has a three-dimensional border style intended to be used for items that do not accept user input.
WS_EX_TRANSPARENT	0x00000020	Y	Y	The window should not be painted until siblings beneath the window (that were created by the same thread) have been painted. The window appears transparent because the bits of underlying sibling windows have already been painted.
WS_EX_WINDOWEDGE	0x00000100	Y	Y	The window has a border with a raised edge.

9.6.3 Control Class Names

Class names used are either embedded into the installed operating system, by the application or by third-party applications. Legato supports the following embedded common controls and their styles:

Defined Name	Class Name	Description
WC_BUTTON	Button	Press/push button style controls such as buttons, checkboxes, radio buttons. Use the Button and Checkbox functions to access.
WC_COMBOBOX	ComboBox	Combination edit and list box. Use the ComboBox functions to access.
WC_COMBOBOXEX	ComboBoxEx32	Combination edit and list box. Use the ComboBox functions to access.
DATETIMEPICK_CLASS	SysDateTimePick32	Date and time pickers. Use the Date and Time control functions to access.
WC_EDIT	Edit	Single and multiple line edit input control. Use the Edit functions to access.
WC_HEADER	SysHeader32	Header control. There are presently no specific access functions.
WC_IPADDRESS	SysIPAddress32	IP address control. There are presently no specific access functions.
WC_LINK	SysLink	A static style text control with link highlighting. Use the HypertextControl functions to access.
WC_LISTBOX	ListBox	List box control. Use the ListBox functions to access.
WC_LISTVIEW	SysListView32	List box style control. There are presently no specific access functions.
WC_NATIVEFONTCTL	NativeFontCtl	Windows control. There are presently no specific access functions.
WC_PAGESCROLLER	SysPager	Windows control. There are presently no specific access functions.
WC_TABCONTROL	SysTabControl32	Tab rack control. Use the TabControl functions to access.
WC_TRACKBAR	msctls_trackbar32	Trackbar Control. Use the Trackbar functions to access.
WC_TREEVIEW	SysTreeView32	Tree style control. There are presently no specific access functions.
WC_SCROLLBAR	ScrollBar	Scrollbar control. Use the Scrollbar functions to access.
WC_STATIC	Static	Static display control for text, lines, rectangles, bitmaps and icons. Use the StaticControl functions to access.

Additional window classes can be used but must be manually accessed. Many controls respond to EditSetText and EditGetText.

Application embedded classes can include:

	Class Name		Description
	data_control		Spread sheet style control embedded into Legato. Use the DataControl functions to access.
	img_preview_control		A control to allow the previewing of various image types. Use the EditSetText function to display an image.
	page_view		An HTML page editor. Use the Page Control functions to access. This control is only available on applications with HTML editing enabled.

9.6.4 Button Class Styles

The following table lists the style bits that can be used with the button common control window class. Note that some of the styles dramatically change the appearance and behavior of the control. Also note, that when a control type such as AUTOCHECKBOX is employed, it will automatically fold in certain style bits.

	Constant		Description
	BS_3STATE		Creates a button that is the same as a check box, except that the box can be grayed as well as checked or cleared. Use the grayed state to show that the state of the check box is not determined.
	BS_AUTO3STATE		Creates a button that is the same as a three-state check box, except that the box changes its state when the user selects it. The state cycles through checked, indeterminate, and cleared.
	BS_AUTOCHECKBOX		Creates a button that is the same as a check box, except that the check state automatically toggles between checked and cleared each time the user selects the check box.
	BS_AUTORADIOBUTTON		Creates a button that is the same as a radio button, except that when the user selects it, the system automatically sets the button’s check state to checked and automatically sets the check state for all other buttons in the same group to cleared.
	BS_BITMAP		Specifies that the button displays a bitmap.
	BS_BOTTOM		Places text at the bottom of the button rectangle.
	BS_CENTER		Centers text horizontally in the button rectangle.
	BS_CHECKBOX		Creates a small, empty check box with text. By default, the text is displayed to the right of the check box. To display the text to the left of the check box, combine this flag with the BS_LEFTTEXT style (or with the equivalent BS_RIGHTBUTTON style).
	BS_DEFPUSHBUTTON		Creates a push button that behaves like a BS_PUSHBUTTON style button, but has a distinct appearance. If the button is in a dialog box, the user can select the button by pressing the ENTER key, even when the button does not have the input focus. This style is useful for enabling the user to quickly select the most likely (default) option.
	BS_FLAT		Specifies that the button is two-dimensional; it does not use the default shading to create a 3-D image. Note that the default Windows 10 theme is flat.
	BS_GROUPBOX		Creates a rectangle in which other controls can be grouped. Any text associated with this style is displayed in the rectangle’s upper left corner.
	BS_ICON		Specifies that the button displays an icon.
	BS_LEFT		Left-justifies the text in the button rectangle. However, if the button is a check box or radio button that does not have the BS_RIGHTBUTTON style, the text is left justified on the right side of the check box or radio button.
	BS_LEFTTEXT		Places text on the left side of the radio button or check box when combined with a radio button or check box style. Same as the BS_RIGHTBUTTON style.
	BS_MULTILINE		Wraps the button text to multiple lines if the text string is too long to fit on a single line in the button rectangle.
	BS_NOTIFY		Enables a button to send BN_KILLFOCUS and BN_SETFOCUS notification codes to its parent window. Note that buttons send the BN_CLICKED notification code regardless of whether it has this style. To get BN_DBLCLK notification codes, the button must have the BS_RADIOBUTTON or BS_OWNERDRAW style.
	BS_OWNERDRAW		Creates an owner-drawn button. The owner window receives a WM_DRAWITEM message when a visual aspect of the button has changed. Note that this is not supported well within Legato.
	BS_PUSHBUTTON		Creates a push button that posts a WM_COMMAND message to the owner window when the user selects the button.
	BS_PUSHLIKE		Makes a button (such as a check box, three-state check box, or radio button) look and act like a push button. The button looks raised when it isn’t pushed or checked, and sunken when it is pushed or checked.
	BS_RADIOBUTTON		Creates a small circle with text. By default, the text is displayed to the right of the circle. To display the text to the left of the circle, combine this flag with the BS_LEFTTEXT style (or with the equivalent BS_RIGHTBUTTON style). Use radio buttons for groups of related, but mutually exclusive choices.
	BS_RIGHT		Right-justifies text in the button rectangle. However, if the button is a check box or radio button that does not have the BS_RIGHTBUTTON style, the text is right justified on the right side of the check box or radio button.
	BS_RIGHTBUTTON		Positions a radio button’s circle or a check box’s square on the right side of the button rectangle. Same as the BS_LEFTTEXT style.
	BS_TEXT		Specifies that the button displays text.
	BS_TOP		Places text at the top of the button rectangle.
	BS_VCENTER		Places text in the middle (vertically) of the button rectangle.

9.6.5 ComboBox Class Styles

The following table lists the style bits that can be used with the combobox common control window class.

	Constant		Description
	CBS_AUTOHSCROLL		Automatically scrolls the text in an edit control to the right when the user types a character at the end of the line. If this style is not set, only text that fits within the rectangular boundary is allowed.
	CBS_DISABLENOSCROLL		Shows a disabled vertical scrollbar in the list box when the box does not contain enough items to scroll. Without this style, the scrollbar is hidden when the list box does not contain enough items.
	CBS_DROPDOWN		Similar to CBS_SIMPLE, except that the list box is not displayed unless the user selects an icon next to the edit control.
	CBS_DROPDOWNLIST		Similar to CBS_DROPDOWN, except that the edit control is replaced by a static text item that displays the current selection in the list box.
	CBS_HASSTRINGS		Specifies that an owner-drawn combo box contains items consisting of strings. The combo box maintains the memory and address for the strings so the application can use the CB_GETLBTEXT message to retrieve the text for a particular item. For accessibility issues, see Exposing Owner-Drawn Combo Box Items
	CBS_LOWERCASE		Converts to lowercase all text in both the selection field and the list.
	CBS_NOINTEGRALHEIGHT		Specifies that the size of the combo box is exactly the size specified by the application when it created the combo box. Normally, the system sizes a combo box so that it does not display partial items.
	CBS_OEMCONVERT		Converts text entered in the combo box edit control from the Windows character set to the OEM character set and then back to the Windows character set. This style is most useful for combo boxes that contain file names and applies only to combo boxes created with the CBS_SIMPLE or CBS_DROPDOWN style.
	CBS_OWNERDRAWFIXED		Specifies that the owner of the list box is responsible for drawing its contents and that the items in the list box are all the same height. The owner window receives a WM_MEASUREITEM message when the combo box is created and a WM_DRAWITEM message when a visual aspect of the combo box has changed.
	CBS_OWNERDRAWVARIABLE		Specifies that the owner of the list box is responsible for drawing its contents and that the items in the list box are variable in height. The owner window receives a WM_MEASUREITEM message for each item in the combo box when you create the combo box and a WM_DRAWITEM message when a visual aspect of the combo box has changed.
	CBS_SIMPLE		Displays the list box at all times. The current selection in the list box is displayed in the edit control.
	CBS_SORT		Automatically sorts strings added to the list box.
	CBS_UPPERCASE		Converts to uppercase all text in both the selection field and the list.

9.6.6 Edit Class Styles

	Constant		Description
	ES_AUTOHSCROLL		Automatically scrolls text to the right by 10 characters when the user types a character at the end of the line. When the user presses the ENTER key, the control scrolls all text back to position zero.
	ES_AUTOVSCROLL		Automatically scrolls text up one page when the user presses the ENTER key on the last line.
	ES_CENTER		Centers text in a single-line or multi-line edit control.
	ES_LEFT		Aligns text with the left margin.
	ES_LOWERCASE		Converts all characters to lowercase as they are typed into the edit control.
	ES_MULTILINE		Designates a multi-line edit control. The default is single-line edit control. When the multi-line edit control is in a dialog box, the default response to pressing the ENTER key is to activate the default button. To use the ENTER key as a carriage return, use the ES_WANTRETURN style. When the multi-line edit control is not in a dialog box and the ES_AUTOVSCROLL style is specified, the edit control shows as many lines as possible and scrolls vertically when the user presses the ENTER key. If you do not specify ES_AUTOVSCROLL, the edit control shows as many lines as possible and beeps if the user presses the ENTER key when no more lines can be displayed. If you specify the ES_AUTOHSCROLL style, the multi-line edit control automatically scrolls horizontally when the caret goes past the right edge of the control. To start a new line, the user must press the ENTER key. If you do not specify ES_AUTOHSCROLL, the control automatically wraps words to the beginning of the next line when necessary. A new line is also started if the user presses the ENTER key. The window size determines the position of the Wordwrap. If the window size changes, the Wordwrapping position changes and the text is redisplayed. Multi-line edit controls can have scrollbars. An edit control with scrollbars processes its own scrollbar messages. Note that edit controls without scrollbars. scrolling as described in the previous paragraphs and process any scroll messages sent by the parent window.
	ES_NOHIDESEL		Negates the default behavior for an edit control. The default behavior hides the selection when the control loses the input focus and inverts the selection when the control receives the input focus. If you specify ES_NOHIDESEL, the selected text is inverted, even if the control does not have the focus.
	ES_NUMBER		Allows only digits to be entered into the edit control. Note that, even with this set, it is still possible to paste non-digits into the edit control.
	ES_OEMCONVERT		Converts text entered in the edit control. The text is converted from the Windows character set to the OEM character set and then back to the Windows character set.
	ES_PASSWORD		Displays an asterisk (*) for each character typed into the edit control. This style is valid only for single-line edit controls.
	ES_READONLY		Prevents the user from typing or editing text in the edit control. To change this style after the control has been created, use the EM_SETREADONLY message.
	ES_RIGHT		Right-aligns text in a single-line or multiline edit control.
	ES_UPPERCASE		Converts all characters to uppercase as they are typed into the edit control.
	ES_WANTRETURN		Specifies that a carriage return be inserted when the user presses the ENTER key while entering text into a multiline edit control in a dialog box. If you do not specify this style, pressing the ENTER key has the same effect as pressing the dialog box’s default push button. This style has no effect on a single-line edit control.

9.6.7 ListBox Class Styles

	Constant		Description
	LBS_COMBOBOX		Notifies a list box that it is part of a combo box. This allows coordination between the two controls so that they present a unified UI. The combo box itself must set this style. If the style is set by anything but the combo box, the list box will regard itself incorrectly as a child of a combo box and a failure will result.
	LBS_DISABLENOSCROLL		Shows a disabled horizontal or vertical scrollbar when the list box does not contain enough items to scroll. If you do not specify this style, the scrollbar is hidden when the list box does not contain enough items. This style must be used with the WS_VSCROLL or WS_HSCROLL style.
	LBS_EXTENDEDSEL		Allows multiple items to be selected by using the SHIFT key and the mouse or special key combinations.
	LBS_HASSTRINGS		Specifies that a list box contains items consisting of strings. The list box maintains the memory and addresses for the strings so that the application can use the LB_GETTEXT message to retrieve the text for a particular item. By default, all list boxes except owner-drawn list boxes have this style. You can create an owner-drawn list box either with or without this style.For owner-drawn list boxes without this style, the LB_GETTEXT message retrieves the value associated with an item (the item data).
	LBS_MULTICOLUMN		Specifies a multi-column list box that is scrolled horizontally. The list box automatically calculates the width of the columns, or an application can set the width by using the LB_SETCOLUMNWIDTH message. If a list box has the LBS_OWNERDRAWFIXED style, an application can set the width when the list box sends the WM_MEASUREITEM message. A list box with the LBS_MULTICOLUMN style cannot scroll verticallyâ€“it ignores any WM_VSCROLL messages it receives. The LBS_MULTICOLUMN and LBS_OWNERDRAWVARIABLE styles cannot be combined. If both are specified, LBS_OWNERDRAWVARIABLE is ignored.
	LBS_MULTIPLESEL		Turns string selection on or off each time the user clicks or double-clicks a string in the list box. The user can select any number of strings.
	LBS_NODATA		Specifies a no-data list box. Specify this style when the count of items in the list box will exceed one thousand. A no-data list box must also have the LBS_OWNERDRAWFIXED style, but must not have the LBS_SORT or LBS_HASSTRINGS style. A no-data list box resembles an owner-drawn list box except that it contains no string or bitmap data for an item. Commands to add, insert, or delete an item always ignore any specified item data; requests to find a string within the list box always fail. The system sends the WM_DRAWITEM message to the owner window when an item must be drawn. The itemID member of the DRAWITEMSTRUCT structure passed with the WM_DRAWITEM message specifies the line number of the item to be drawn. A no-data list box does not send a WM_DELETEITEM message.
	LBS_NOINTEGRALHEIGHT		Specifies that the size of the list box is exactly the size specified by the application when it created the list box. Normally, the system sizes a list box so that the list box does not display partial items. For list boxes with the LBS_OWNERDRAWVARIABLE style, the LBS_NOINTEGRALHEIGHT style is always enforced.
	LBS_NOREDRAW		Specifies that the list box’s appearance is not updated when changes are made. To change the redraw state of the control, use the WM_SETREDRAW message.
	LBS_NOSEL		Specifies that the list box contains items that can be viewed but not selected.
	LBS_NOTIFY		Causes the list box to send a notification code to the parent window whenever the user clicks a list box item (LBN_SELCHANGE), double-clicks an item (LBN_DBLCLK), or cancels the selection (LBN_SELCANCEL).
	LBS_OWNERDRAWFIXED		Specifies that the owner of the list box is responsible for drawing its contents and that the items in the list box are the same height. The owner window receives a WM_MEASUREITEM message when the list box is created and a WM_DRAWITEM message when a visual aspect of the list box has changed.
	LBS_OWNERDRAWVARIABLE		Specifies that the owner of the list box is responsible for drawing its contents and that the items in the list box are variable in height. The owner window receives a WM_MEASUREITEM message for each item in the box when the list box is created and a WM_DRAWITEM message when a visual aspect of the list box has changed. This style causes the LBS_NOINTEGRALHEIGHT style to be enabled. This style is ignored if the LBS_MULTICOLUMN style is specified.
	LBS_SORT		Sorts strings in the list box alphabetically.
	LBS_STANDARD		Sorts strings in the list box alphabetically. The parent window receives a notification code whenever the user clicks a list box item, double-clicks an item, or cancels the selection. The list box has a vertical scrollbar, and it has borders on all sides. This style combines the LBS_NOTIFY, LBS_SORT, WS_VSCROLL, and WS_BORDER styles.
	LBS_USETABSTOPS		Enables a list box to recognize and expand tab characters when drawing its strings. Use the ListBoxSetTabPositions function to set the tab stops in dialog units.
	LBS_WANTKEYBOARDINPUT		Specifies that the owner of the list box receives WM_VKEYTOITEM messages whenever the user presses a key and the list box has the input focus. This enables an application to perform special processing on the keyboard input.

9.6.8 Scrollbar Class Styles

	Constant		Description
	SBS_BOTTOMALIGN		Aligns the bottom edge of the scrollbar with the bottom edge of the rectangle defined by the x, y, nWidth, and nHeight parameters of control resource. The scrollbar has the default height for system scrollbars. Use this style with the SBS_HORZ style.
	SBS_HORZ		Designates a horizontal scrollbar. If neither the SBS_BOTTOMALIGN nor SBS_TOPALIGN style is specified, the scrollbar has the height, width, and position specified by the x, y, nWidth, and nHeight parameters of control resource.
	SBS_LEFTALIGN		Aligns the left edge of the scrollbar with the left edge of the rectangle defined by the x, y, nWidth, and nHeight parameters of control resource. The scrollbar has the default width for system scrollbars. Use this style with the SBS_VERT style.
	SBS_RIGHTALIGN		Aligns the right edge of the scrollbar with the right edge of the rectangle defined by the x, y, nWidth, and nHeight parameters of control resource. The scrollbar has the default width for system scrollbars. Use this style with the SBS_VERT style.
	SBS_SIZEBOX		Designates a size box. If you do not specify either the SBS_SIZEBOXBOTTOMRIGHTALIGN or the SBS_SIZEBOXTOPLEFTALIGN style, the size box has the height, width, and position specified by the x, y, nWidth, and nHeight parameters of the control resource.
	SBS_SIZEBOXBOTTOMRIGHTALIGN		Aligns the lower right corner of the size box with the lower right corner of the rectangle specified by the x, y, nWidth, and nHeight parameters of control resource. The size box has the default size for system size boxes. Use this style with the SBS_SIZEBOX style.
	SBS_SIZEBOXTOPLEFTALIGN		Aligns the upper left corner of the size box with the upper left corner of the rectangle specified by the x, y, nWidth, and nHeight parameters of control resource. The size box has the default size for system size boxes. Use this style with the SBS_SIZEBOX style.
	SBS_SIZEGRIP		Same as SBS_SIZEBOX, but with a raised edge.
	SBS_TOPALIGN		Aligns the top edge of the scrollbar with the top edge of the rectangle defined by the x, y, nWidth, and nHeight parameters of the control resource. The scrollbar has the default height for system scrollbars. Use this style with the SBS_HORZ style.
	SBS_VERT		Designates a vertical scrollbar. If you do not specify either the SBS_RIGHTALIGN or the SBS_LEFTALIGN style, the scrollbar has the height, width, and position specified by the x, y, nWidth, and nHeight parameters of the control resource.

9.6.9 Static Class Styles

	Constant		Description
	SS_BITMAP		A bitmap is to be displayed in the static control. The text is the name of a bitmap (not a filename) defined elsewhere in the resource file. The style ignores the nWidth and nHeight parameters; the control automatically sizes itself to accommodate the bitmap.
	SS_BLACKFRAME		A box with a frame drawn in the same color as the window frames. This color is black in the default color scheme.
	SS_BLACKRECT		A rectangle filled with the current window frame color. This color is black in the default color scheme.
	SS_CENTER		A simple rectangle and the text is centered in the rectangle. The text is formatted before it is displayed. Words that extend past the end of a line are automatically wrapped to the beginning of the next centered line. Words that are longer than the width of the control are truncated.
	SS_CENTERIMAGE		A bitmap is centered in the static control that contains it. The control is not resized so a bitmap too large for the control will be clipped. If the static control contains a single line of text, the text is centered vertically in the client area of the control. Unused portions of the control will remain the background color.
	SS_EDITCONTROL		The static control duplicates the text-displaying characteristics of a multi-line edit control. Specifically, the average character width is calculated in the same manner as with an edit control, and the function does not display a partially visible last line.
	SS_ENDELLIPSIS		If the end of a string does not fit in the rectangle, it is truncated and ellipses are added. If a word that is not at the end of the string goes beyond the limits of the rectangle, it is truncated without ellipses. Using this style will force the control’s text to be on one line with no word wrap. Compare with SS_PATHELLIPSIS and SS_WORDELLIPSIS.
	SS_ENHMETAFILE		An enhanced metafile is to be displayed in the static control. The text is the name of a metafile. An enhanced metafile static control has a fixed size; the metafile is scaled to fit the static control’s client area.
	SS_GRAYFRAME		A box with a frame drawn with the same color as the screen background (desktop). This color is gray in the default color scheme.
	SS_GRAYRECT		A rectangle filled with the current screen background color. This color is gray in the default color scheme.
	SS_ICON		An icon to be displayed in the dialog box. If the control is created as part of a dialog box, the text is the name of an icon (not a filename) defined elsewhere in the resource file.
	SS_LEFT		A simple rectangle and the text is left-aligned in the rectangle. The text is formatted before it is displayed. Words that extend past the end of a line are automatically wrapped to the beginning of the next left-aligned line. Words that are longer than the width of the control are truncated.
	SS_LEFTNOWORDWRAP		A simple rectangle and the text is left-aligned in the rectangle. Tabs are expanded, but words are not wrapped. Text that extends past the end of a line is clipped.
	SS_NOPREFIX		Prevents interpretation of any ampersand (&) characters in the control’s text as accelerator prefix characters. These are displayed with the ampersand removed and the next character in the string underlined. This static control style may be included with any of the defined static controls. You can combine SS_NOPREFIX with other styles. This can be useful when filenames or other strings that may contain an ampersand (&) must be displayed in a static control in a dialog box.
	SS_NOTIFY		Sends the parent window STN_CLICKED, STN_DBLCLK, STN_DISABLE, and STN_ENABLE notification codes when the user clicks or double-clicks the control.
	SS_PATHELLIPSIS		Replaces characters in the middle of the string with ellipses so that the result fits in the specified rectangle. If the string contains backslash (\) characters, SS_PATHELLIPSIS preserves as much as possible of the text after the last backslash. Using this style will force the control’s text to be on one line with no word wrap. Compare with SS_ENDELLIPSIS and SS_WORDELLIPSIS.
	SS_REALSIZECONTROL		Adjusts the bitmap to fit the size of the static control. For example, changing the locale can change the system font, and thus controls might be resized. If a static control had a bitmap, the bitmap would no longer fit the control. This style bit dictates automatic redimensioning of bitmaps to fit their controls. If SS_CENTERIMAGE is specified, the bitmap or icon is centered (and clipped if needed). If SS_CENTERIMAGE is not specified, the bitmap or icon is stretched or shrunk. Note that the redimensioning in the two axes are independent, and the result may have a changed aspect ratio. Compare with SS_REALSIZEIMAGE.
	SS_REALSIZEIMAGE		Specifies that the actual resource width is used and the icon is loaded using LoadIcon. SS_REALSIZEIMAGE is always used in conjunction with SS_ICON. SS_REALSIZEIMAGE uses LoadIcon, overriding the process normally followed under SS_ICON.
	SS_RIGHT		A simple rectangle and the text is right-aligned in the rectangle. The text is formatted before it is displayed. Words that extend past the end of a line are automatically wrapped to the beginning of the next right-aligned line. Words that are longer than the width of the control are truncated.
	SS_RIGHTJUST		The lower right corner of a static control with the SS_BITMAP or SS_ICON style is to remain fixed when the control is resized. Only the top and left sides are adjusted to accommodate a new bitmap or icon.
	SS_SIMPLE		A simple rectangle and displays a single line of left-aligned text in the rectangle. The text line cannot be shortened or altered in any way. Also, if the control is disabled, the control does not gray its text.
	SS_SUNKEN		Draws a half-sunken border around a static control.
	SS_TYPEMASK		A composite style bit that results from using the OR operator on SS_* style bits. Can be used to mask out valid SS_* bits from a given bitmask. Note that this is out of date and does not correctly include all valid styles. Thus, you should not use this style.
	SS_WHITEFRAME		A box with a frame drawn with the same color as the window background. This color is white in the default color scheme.
	SS_WHITERECT		A rectangle filled with the current window background color. This color is white in the default color scheme.
	SS_WORDELLIPSIS		Truncates any word that does not fit in the rectangle and adds ellipses. Using this style will force the control’s text to be on one line with no word wrap. Compare with SS_ENDELLIPSIS and SS_PATHELLIPSIS.

9.6.10 Trackbar Class Styles

	Constant		Description
	TBS_AUTOTICKS		The trackbar control has a tick mark for each increment in its range of values. The frequency of the ticks can be adjusted via the TrackbarSetTickFrequency function.
	TBS_BOTH		The trackbar control displays tick marks on both sides of the control. This will be both top and bottom when used with TBS_HORZ or both left and right if used with TBS_VERT.
	TBS_BOTTOM		The trackbar control displays tick marks below the control. This style is valid only with TBS_HORZ.
	TBS_DOWNISLEFT		By default, the trackbar control uses down equal to right and up equal to left. Use the TBS_DOWNISLEFT style to reverse the default, making down equal left and up equal right.
	TBS_ENABLESELRANGE		The trackbar control displays a selection range only. The tick marks at the starting and ending positions of a selection range are displayed as triangles (instead of vertical dashes), and the selection range is highlighted.
	TBS_FIXEDLENGTH		The trackbar control allows the size of the slider to be changed with TrackbarSetSliderSize function.
	TBS_HORZ		The trackbar control is oriented horizontally. This is the default orientation.
	TBS_LEFT		The trackbar control displays tick marks to the left of the control. This style is valid only with TBS_VERT.
	TBS_NOTHUMB		The trackbar control does not display a slider.
	TBS_NOTICKS		The trackbar control does not display any tick marks.
	TBS_NOTIFYBEFOREMOVE		Trackbar should notify parent before repositioning the slider due to user action (enables snapping). When present, the TRBN_THUMBPOSCHANGING is sent via the action procedure.
	TBS_REVERSED		This style bit is used for "reversed" trackbars, where a smaller number indicates "higher" and a larger number indicates "lower." It has no effect on the control; it is simply a label that can be checked to determine whether a trackbar is normal or reversed.
	TBS_RIGHT		The trackbar control displays tick marks to the right of the control. This style is valid only with TBS_VERT.
	TBS_TOP		The trackbar control displays tick marks above the control. This style is valid only with TBS_HORZ.
	TBS_TOOLTIPS		The trackbar control supports tooltips. When a trackbar control is created using this style, it automatically creates a default tooltip control that displays the slider's current position. You can change where the tooltips are displayed by using the TrackbarSetToolTipPosition function.
	TBS_TRANSPARENTBKGND		Background is painted by the parent.
	TBS_VERT		The trackbar control is oriented vertically. The default is horizontal.

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