BOOL SetWindowPos( const CWnd* pWndInsertAfter, int x, int y, int cx, int cy, UINT nFlags );
Nonzero if the function is successful; otherwise 0.
Identifies the CWnd object that will precede this CWnd object in the Z-order. This parameter can be a pointer to a CWnd or a Pointer to one of the following values:
wndBottom Places the window at the bottom of the Z-order. If this CWnd is a topmost window, the window loses its topmost status; the system places the window at the bottom of all other windows.
wndTop Places the window at the top of the Z-order.
wndTopMost Places the window above all nontopmost windows. The window maintains its topmost position even when it is deactivated.
wndNoTopMost Repositions the window to the top of all nontopmost windows (that is, behind all topmost windows). This flag has no effect if the window is already a nontopmost window.
See the “Remarks” section for this function for rules about how this parameter is used