[VC++] Hiding application button from Taskbar

If you do not want to show your application on Windows Taskbar while it is running, modify the CMainFrame::PreCreateWindow() by adding WS_EX_TOOLWINDOW style and removing WS_EX_APPWINDOW style to Create Structure. See the below code which will do the same.

BOOL CMainFrame::PreCreateWindow(CREATESTRUCT& cs)
{
 if( !CFrameWnd::PreCreateWindow(cs) )
  return FALSE;
    // Adding Tool window style
    cs.dwExStyle = WS_EX_TOOLWINDOW ;
    // Removing App window style
    cs.dwExStyle &= ~WS_EX_APPWINDOW ;
    return TRUE;
}