Hi,
My mainframe window has close,mini amd maxi buttons.
But it does not work.
I cannot close or minimize the window.
Whats the reason.
My Precreatewindow codes like

BOOL CMainFrame::PreCreateWindow(CREATESTRUCT& cs)
{
cs.style = WS_POPUP | WS_OVERLAPPED | WS_CAPTION | FWS_ADDTOTITLE
| WS_SYSMENU | WS_MINIMIZEBOX | WS_MAXIMIZEBOX | WS_MAXIMIZE;

return CMDIFrameWnd::PreCreateWindow(cs);
}
Whats the reason?