AnimateWindow function (winuser.h)
Enables you to produce special effects when showing or hiding windows. There are four types of animation: roll, slide, collapse or expand, and alpha-blended fade.
Syntax
BOOL AnimateWindow(
[in] HWND hWnd,
[in] DWORD dwTime,
[in] DWORD dwFlags
);
Parameters
[in] hWnd
Type: HWND
A handle to the window to animate. The calling thread must own this window.
[in] dwTime
Type: DWORD
The time it takes to play the animation, in milliseconds. Typically, an animation takes 200 milliseconds to play.
[in] dwFlags
Type: DWORD
The type of animation. This parameter can be one or more of the following values. Note that, by default, these flags take effect when showing a window. To take effect when hiding a window, use AW_HIDE and a logical OR operator with the appropriate flags.
Return value
Type: BOOL
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. The function will fail in the following situations:
- If the window is already visible and you are trying to show the window.
- If the window is already hidden and you are trying to hide the window.
- If there is no direction specified for the slide or roll animation.
- When trying to animate a child window with AW_BLEND.
- If the thread does not own the window. Note that, in this case, AnimateWindow fails but GetLastError returns ERROR_SUCCESS.
Remarks
To show or hide a window without special effects, use ShowWindow.
When using slide or roll animation, you must specify the direction. It can be either AW_HOR_POSITIVE, AW_HOR_NEGATIVE, AW_VER_POSITIVE, or AW_VER_NEGATIVE.
You can combine AW_HOR_POSITIVE or AW_HOR_NEGATIVE with AW_VER_POSITIVE or AW_VER_NEGATIVE to animate a window diagonally.
The window procedures for the window and its child windows should handle any WM_PRINT or WM_PRINTCLIENT messages. Dialog boxes, controls, and common controls already handle WM_PRINTCLIENT. The default window procedure already handles WM_PRINT.
If a child window is displayed partially clipped, when it is animated it will have holes where it is clipped.
AnimateWindow supports RTL windows.
Avoid animating a window that has a drop shadow because it produces visually distracting, jerky animations.
Requirements
Requirement | Value |
---|---|
Minimum supported client | Windows 2000 Professional [desktop apps only] |
Minimum supported server | Windows 2000 Server [desktop apps only] |
Target Platform | Windows |
Header | winuser.h (include Windows.h) |
Library | User32.lib |
DLL | User32.dll |
API set | ext-ms-win-ntuser-window-l1-1-0 (introduced in Windows 8) |
See also
Conceptual
Other Resources
Reference