Code for implementing the full screen function of MFC

Many players have shortcut key control windows displayed in full screen mode. Adding the full screen function to an application does not require a lot of code. For example, adding the full screen function to a dialog box-based application requires only a small amount of code to work.

Void CFullScreenDlg: FullScreenView (void)
{
RECT rectDesktop;
WINDOWPLACEMENT wpNew;
If (! IsFullScreen ())
{
// Well need these to restore the original state.
GetWindowPlacement (& m_wpPrev );
// Adjust RECT to new size of window
: GetWindowRect (: getwindowtopwindow (), rectDesktop );
: AdjustWindowRectEx (rectDesktop, GetStyle (), FALSE, GetExStyle ());
// Remember this for OnGetMinMaxInfo ()
M_rcFullScreenRect = rectDesktop;
WpNew = m_wpPrev;
WpNew. showCmd = SW_SHOWNORMAL;
WpNew. rcNormalPosition = rectDesktop;
M_bFullScreen = true;
}
Else
{
// Restore to the original window status when you exit the full screen
M_bFullScreen = false;
WpNew = m_wpPrev;
}
SetWindowPlacement (& wpNew );
}
Void CFullScreenDlg: OnGetMinMaxInfo (MINMAXINFO * lpMMI)
{
// TODO: Add your message handler code here and/or call default
If (IsFullScreen ())
{
LpMMI-> ptMaxSize. y = m_rcFullScreenRect.Height ();
LpMMI-> ptMaxTrackSize. y = lpMMI-> ptMaxSize. y;
LpMMI-> ptMaxSize. x = m_rcFullScreenRect.Width ();
LpMMI-> ptMaxTrackSize. x = lpMMI-> ptMaxSize. x;
}
CDialog: OnGetMinMaxInfo (lpMMI );
}
Bool CFullScreenDlg: IsFullScreen (void)
{
// Record whether the window is in full screen status
Return m_bFullScreen;
}