MFC to achieve full screen function code example

Many of the players in Windows applications have shortcut control Windows that are displayed on a full screen. The MFC implementation adds full-screen functionality to an application without a lot of code, such as adding full-screen functionality to a dialog-based application with only a few of the following code.

The implementation code is as follows:

void CFullScreenDlg::FullScreenView(void)
{
RECT rectDesktop;
WINDOWPLACEMENT wpNew;
if (!IsFullScreen())
{
// We'll need these to restore the original state.
GetWindowPlacement (&m_wpPrev);
//Adjust RECT to new size of window
::GetWindowRect ( ::GetDesktopWindow(), &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
{
//Return to the original window state when exiting 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 currently in full screen state
return m_bFullScreen;
}