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CWindow::SetWindowPos

BOOL SetWindowPos( HWND hWndInsertAfter, int x, int y, int cx, int cy, UINT nFlags );

BOOL SetWindowPos( HWND hWndInsertAfter, LPCRECT lpRect, UINT nFlags );

1 BOOL CXXX::OnInitDialog()
2 {
3 　　CRect rect;
4    GetWindowRect(&rect);
5     ::SetWindowPos(this->m_hWnd,HWND_TOPMOST,Rect.left,Rect.top,
6             Rect.Width(),Rect.Height(),SWP_NOMOVE | SWP_NOSIZE);
7 }

BringWindowToTop

This function brings the specified window to the top of the z-order. If the window is a top-level window, it is activated. If the window is a child window, the top-level parent window associated with the child window is activated.

BOOL BringWindowToTop( 
HWND hWnd );

Parameters

hWnd

Handle to the window to bring to the top of the z-order.

Return Values

Nonzero indicates success. Zero indicates failure. To get extended error information, call GetLastError.

bringwindowtotop 如果窗口为顶层窗口，则该窗口被激活；如果窗口为子窗口，则相应的顶级父窗口被激活。

窗口置顶方法

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原文地址：http://www.cnblogs.com/wuguoqiang/p/5955683.html