SendMessage的使用请帮助

[redjuly]

在对话框程序内想通过 SendMessage 函数发送 WM_SIZING
不知道 SendMessage 的另外两个参数应该怎样填充
才能把 (UINT fwSide, LPRECT pRect)
两个参数给填上？

[zx_sanjin]

以下摘自MSDN:

WM_SIZING
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.

A window receives this message through its WindowProc function.

LRESULT CALLBACK WindowProc(
HWND hwnd, // handle to window
UINT uMsg, // WM_SIZING
WPARAM wParam, // edge of window
LPARAM lParam // drag rectangle (LPRECT)
);
Parameters
wParam
Specifies which edge of the window is being sized. This parameter can be one or more 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


lParam
Pointer to 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.

Requirements
Windows NT/2000: Requires Windows NT 4.0 or later.
Windows 95/98: Requires Windows 95 or later.
Header: Declared in Winuser.h; include Windows.h.



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[herojx]

如果你的WM_SIZING消息处理中,不需要另外两个参数传递值的话,都设NULL吧

[redjuly]

555，偶越来越土了。。