Re: Center an SDI application on startup

Ian Semmel <>
Sat, 17 Jun 2006 05:37:00 +1000
Just another point, if you have a toolbar down the side of the screen,
GetSystemMetrics doesn't take it into account, so you can use

    RECT screen;

    BOOL rv = SystemParametersInfo ( SPI_GETWORKAREA, 0, & screen, 0 ); = screen.right; = screen.bottom;
    cs.y =;
    cs.x = screen.left;

Mark F. wrote:

"JoeB" <> wrote in message


How simple is it to center an SPI application when it starts up in a
non-maximized window?


Here is another cool trick to center the mainframe at 90% of the screen
size. The code is added in the PreCreateWindow function.

--- snip ---
BOOL CMainFrame::PreCreateWindow(CREATESTRUCT& cs)
 if( !CMDIFrameWnd::PreCreateWindow(cs) )
  return FALSE;

 // add this ------------------------------
 int xSize = ::GetSystemMetrics(SM_CXSCREEN);
 int ySize = ::GetSystemMetrics(SM_CYSCREEN); = xSize * 9 / 10; = ySize * 9 / 10;
 cs.x = (xSize - / 2;
 cs.y = (ySize - / 2;
 // ---------------------------------------

 return CMDIFrameWnd::PreCreateWindow(cs);

--- snip ---


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