C / C++ / MFC

void CMainFrame::OnDestroy() 
{
	WINDOWPLACEMENT wndPlace;
	if ( GetWindowPlacement( &wndPlace ) )
	{
		AfxGetApp()->WriteProfileInt( "WndPos", "Left", wndPlace.rcNormalPosition.left );
		AfxGetApp()->WriteProfileInt( "WndPos", "Top", wndPlace.rcNormalPosition.top );
		AfxGetApp()->WriteProfileInt( "WndPos", "Right", wndPlace.rcNormalPosition.right );
		AfxGetApp()->WriteProfileInt( "WndPos", "Bottom", wndPlace.rcNormalPosition.bottom );
		AfxGetApp()->WriteProfileInt( "WndPos", "Max", wndPlace.showCmd == SW_SHOWMAXIMIZED );
	}

	CFrameWnd::OnDestroy();
}
 
void CMainFrame::ActivateFrame(int nCmdShow) 
{
	CRect r;

	r.top = AfxGetApp()->GetProfileInt( "WndPos", "Top", 0 );
	r.left = AfxGetApp()->GetProfileInt( "WndPos", "Left", 0 );
	r.bottom = AfxGetApp()->GetProfileInt( "WndPos", "Bottom", 400 );
	r.right = AfxGetApp()->GetProfileInt( "WndPos", "Right", 600 );
	MoveWindow( r );

	if ( AfxGetApp()->GetProfileInt( "WndPos", "Max", -1 ) == -1 )
	{
		CenterWindow();
		nCmdShow = SW_MAXIMIZE;
	}

	if ( AfxGetApp()->GetProfileInt( "WndPos", "Max", 0 ) == 1 )
		nCmdShow = SW_MAXIMIZE;
	
	CFrameWnd::ActivateFrame(nCmdShow);
}

#include <multimon.h>

        if ( WinPlatform() & ( WIN_98 | WIN_NT5 )
          && GetSystemMetrics( SM_CMONITORS ) > 1    // if > one monitor.
           )
        {
            // SM_CXVIRTUALSCREEN, SM_CYVIRTUALSCREEN  are the width and height,
            // in pixels, of the virtual screen.
            // SM_XVIRTUALSCREEN, SM_YVIRTUALSCREEN metrics are the coordinates
            // of the top left corner of the virtual screen.
            // The virtual screen is the bounding rectangle of all display monitors.
            // See also: SM_CMONITORS, SM_SAMEDISPLAYFORMAT.
            pRect->top    = GetSystemMetrics( SM_YVIRTUALSCREEN );
            pRect->left   = GetSystemMetrics( SM_XVIRTUALSCREEN );
            pRect->right  = GetSystemMetrics( SM_CXVIRTUALSCREEN ) + pRect->left;
            pRect->bottom = GetSystemMetrics( SM_CYVIRTUALSCREEN ) + pRect->top;
        }