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WINDOWPOS info  Overview  Group

The WINDOWPOS structure contains information about the size and position of a window.

typedef struct _WINDOWPOS { // wp  

    HWND hwnd;                     

    HWND hwndInsertAfter;          

    int  x;                        

    int  y;                        

    int  cx;                       

    int  cy;                       

    UINT flags;                    

} WINDOWPOS; 

 

Members

hwnd
Identifies the window.
hwndInsertAfter
Specifies the position of the window in Z order (front-to-back position). This member can be the handle of the window behind which this window is placed, or can be one of the special values listed with the SetWindowPos function.
x
Specifies the position of the left edge of the window.
y
Specifies the position of the top edge of the window.
cx
Specifies the window width, in pixels.
cy
Specifies the window height, in pixels.
flags
Specifies the window position. This member can be one of the following values:

Value

Meaning

SWP_DRAWFRAME

Draws a frame (defined in the window’s class description) around the window.

SWP_FRAMECHANGED

Sends a WM_NCCALCSIZE message to the window, even if the window’s size is not being changed. If this flag is not specified, WM_NCCALCSIZE is sent only when the window’s size is being changed.

SWP_HIDEWINDOW

Hides the window.

SWP_NOACTIVATE

Does not activate the window. If this flag is not set, the window is activated and moved to the top of either the topmost or non-topmost group (depending on the setting of the hWndInsertAfter parameter).

SWP_NOCOPYBITS

Discards the entire contents of the client area. If this flag is not specified, the valid contents of the client area are saved and copied back into the client area after the window is sized or repositioned.

SWP_NOMOVE

Retains the current position (ignores the X and Y parameters).

SWP_NOOWNERZORDER

Does not change the owner window’s position in the Z order.

SWP_NOREDRAW

Does not redraw changes. If this flag is set, no repainting of any kind occurs. This applies to the client area, the nonclient area (including the title bar and scroll bars), and any part of the parent window uncovered as a result of the window being moved. When this flag is set, the application must explicitly invalidate or redraw any parts of the window and parent window that need redrawing.

SWP_NOREPOSITION

Same as the SWP_NOOWNERZORDER flag.

SWP_NOSENDCHANGING

Prevents the window from receiving the WM_WINDOWPOSCHANGING message.

SWP_NOSIZE

Retains the current size (ignores the cx and cy parameters).

SWP_NOZORDER

Retains the current Z order (ignores the hWndInsertAfter parameter).

SWP_SHOWWINDOW

Displays the window.

See Also

EndDeferWindowPos, SetWindowPos, WM_NCCALCSIZE 

See also:


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