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WM_SIZING Overview  Group

The WM_SIZING message is sent to a window that the user is resizing. By processing this message, an application can monitor the size and position of the drag rectangle and, if needed, change its size or position. 

fwSide = wParam;         // edge of window being sized 

lprc = (LPRECT) lParam;  // screen coordinates of drag rectangle 

 

Parameters

fwSide
Value of wParam. Indicates which edge of the window is being sized. This parameter can be a combination of the following values:

Value

Meaning

WMSZ_BOTTOM

Bottom edge

WMSZ_BOTTOMLEFT

Bottom-left corner

WMSZ_BOTTOMRIGHT

Bottom-right corner

WMSZ_LEFT

Left edge

WMSZ_RIGHT

Right edge

WMSZ_TOP

Top edge

WMSZ_TOPLEFT

Top-left corner

WMSZ_TOPRIGHT

Top-right corner

lprc
Address of a RECT structure with the screen coordinates of the drag rectangle. To change the size or position of the drag rectangle, an application must change the members of this structure.

Return Values

An application should return TRUE if it processes this message.

See Also

RECT, WM_MOVING, WM_SIZE

file: /Techref/os/win/api/win32/mess/src/msg28_3.htm, 3KB, , updated: 2000/4/7 12:20, local time: 2025/5/12 18:21,
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