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Extended Window Styles

The following are the extended window styles.

Constant/valueDescription
WS_EX_ACCEPTFILES
0x00000010L

The window accepts drag-drop files.

WS_EX_APPWINDOW
0x00040000L

Forces a top-level window onto the taskbar when the window is visible.

WS_EX_CLIENTEDGE
0x00000200L

The window has a border with a sunken edge.

WS_EX_COMPOSITED
0x02000000L

Paints all descendants of a window in bottom-to-top painting order using double-buffering. For more information, see Remarks. This cannot be used if the window has a class style of either CS_OWNDC or CS_CLASSDC.

Windows 2000:  This style is not supported.

WS_EX_CONTEXTHELP
0x00000400L

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. If the user then clicks a child window, the child receives a WM_HELP message. The child window should pass the message to the parent window procedure, which should call the WinHelp function using the HELP_WM_HELP command. The Help application displays a pop-up window that typically contains help for the child window.

WS_EX_CONTEXTHELP cannot be used with the WS_MAXIMIZEBOX or WS_MINIMIZEBOX styles.

WS_EX_CONTROLPARENT
0x00010000L

The window itself contains child windows that should take part in dialog box navigation. If this style is specified, the dialog manager recurses into children of this window when performing navigation operations such as handling the TAB key, an arrow key, or a keyboard mnemonic.

WS_EX_DLGMODALFRAME
0x00000001L

The window has a double border; the window can, optionally, be created with a title bar by specifying the WS_CAPTION style in the dwStyle parameter.

WS_EX_LAYERED
0x00080000

The window is a layered window. This style cannot be used if the window has a class style of either CS_OWNDC or CS_CLASSDC.

Windows 8:  The WS_EX_LAYERED style is supported for top-level windows and child windows. Previous Windows versions support WS_EX_LAYERED only for top-level windows.

WS_EX_LAYOUTRTL
0x00400000L

If the shell language is Hebrew, Arabic, or another language that supports reading order alignment, the horizontal origin of the window is on the right edge. Increasing horizontal values advance to the left.

WS_EX_LEFT
0x00000000L

The window has generic left-aligned properties. This is the default.

WS_EX_LEFTSCROLLBAR
0x00004000L

If the shell language is Hebrew, Arabic, or another language that supports reading order alignment, the vertical scroll bar (if present) is to the left of the client area. For other languages, the style is ignored.

WS_EX_LTRREADING
0x00000000L

The window text is displayed using left-to-right reading-order properties. This is the default.

WS_EX_MDICHILD
0x00000040L

The window is a MDI child window.

WS_EX_NOACTIVATE
0x08000000L

A top-level window created with this style does not become the foreground window when the user clicks it. The system does not bring this window to the foreground when the user minimizes or closes the foreground window.

To activate the window, use the SetActiveWindow or SetForegroundWindow function.

The window does not appear on the taskbar by default. To force the window to appear on the taskbar, use the WS_EX_APPWINDOW style.

WS_EX_NOINHERITLAYOUT
0x00100000L

The window does not pass its window layout to its child windows.

WS_EX_NOPARENTNOTIFY
0x00000004L

The child window created with this style does not send the WM_PARENTNOTIFY message to its parent window when it is created or destroyed.

WS_EX_NOREDIRECTIONBITMAP
0x00200000L

The window does not render to a redirection surface. This is for windows that do not have visible content or that use mechanisms other than surfaces to provide their visual.

WS_EX_OVERLAPPEDWINDOW
(WS_EX_WINDOWEDGE | WS_EX_CLIENTEDGE)

The window is an overlapped window.

WS_EX_PALETTEWINDOW
(WS_EX_WINDOWEDGE | WS_EX_TOOLWINDOW | WS_EX_TOPMOST)

The window is palette window, which is a modeless dialog box that presents an array of commands.

WS_EX_RIGHT
0x00001000L

The window has generic "right-aligned" properties. This depends on the window class. This style has an effect only if the shell language is Hebrew, Arabic, or another language that supports reading-order alignment; otherwise, the style is ignored.

Using the WS_EX_RIGHT style for static or edit controls has the same effect as using the SS_RIGHT or ES_RIGHT style, respectively. Using this style with button controls has the same effect as using BS_RIGHT and BS_RIGHTBUTTON styles.

WS_EX_RIGHTSCROLLBAR
0x00000000L

The vertical scroll bar (if present) is to the right of the client area. This is the default.

WS_EX_RTLREADING
0x00002000L

If the shell language is Hebrew, Arabic, or another language that supports reading-order alignment, the window text is displayed using right-to-left reading-order properties. For other languages, the style is ignored.

WS_EX_STATICEDGE
0x00020000L

The window has a three-dimensional border style intended to be used for items that do not accept user input.

WS_EX_TOOLWINDOW
0x00000080L

The window is intended to be used as a floating toolbar. A tool window has a title bar that is shorter than a normal title bar, and the window title is drawn using a smaller font. A tool window does not appear in the taskbar or in the dialog that appears when the user presses ALT+TAB. If a tool window has a system menu, its icon is not displayed on the title bar. However, you can display the system menu by right-clicking or by typing ALT+SPACE.

WS_EX_TOPMOST
0x00000008L

The window should be placed above all non-topmost windows and should stay above them, even when the window is deactivated. To add or remove this style, use the SetWindowPos function.

WS_EX_TRANSPARENT
0x00000020L

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.

To achieve transparency without these restrictions, use the SetWindowRgn function.

WS_EX_WINDOWEDGE
0x00000100L

The window has a border with a raised edge.

Requirements

Minimum supported client

Windows 2000 Professional [desktop apps only]

Minimum supported server

Windows 2000 Server [desktop apps only]

Header

Winuser.h (include Windows.h)

 

 

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