Tabbed MDI

I have written a Tabbed MDI program with a PreCreateWindow function as follows:

BOOL CDigitizeFrame::PreCreateWindow(CREATESTRUCT& cs)
{
  cs.x=cs.y=0;
  cs.cx=cs.cy=32767;
  cs.style |= WS_BORDER;
  cs.style &= ~WS_THICKFRAME;
  cs.style &= ~(WS_MINIMIZEBOX|WS_MAXIMIZEBOX);
  return CMDIChildWnd::PreCreateWindow(cs);
}

The problem is that when I tab to the next window it is drawn as a restored window and not a maximized windows. Does anyone know how to prevent this from happening.

Thanks

Kelvin

I can not do that because I need the windows to remain maximized and not let the user changed them.

Thanks

Kelvin

Kelvin,

Try using this code in your child frame's OnSize() function:

void CChildFrame::OnSize(UINT nType, int cx, int cy)
{
     CMDIChildWnd::OnSize(nType, cx, cy);

      // ADD ->
     if(nType == SIZE_MINIMIZED || nType == SIZE_RESTORED) {
          WINDOWPLACEMENT sWndPos;
          sWndPos.length = sizeof(WINDOWPLACEMENT);
          sWndPos.flags = 0;
          sWndPos.showCmd = SW_SHOWMAXIMIZED;
          SetWindowPlacement(&sWndPos);
     }
     //<- ADD
}

This actually seems to work well with ToolkitPro when combined with a child window that doesn't have Min/Max box styles like yours.  For straight MFC this does not work so well because the Min/Max boxes sometimes show up for some reason.

Also, you might want to remove the FWS_ADDTOTITLE style too because the above code interferes with that process.

If you end up finding a better solution, please post it here.

Thanks oleg that worked ok only you must place it after "LoadCommandBars(_T("Bar State"));"

A fix for the above problem is to place the OnSize code above into ShowWindow.  You still get that annoying redraw flash whenver you click on a tab, but it works:

Any thoughts on how to prevent the redraw flashing?

void CChildFrame::OnShowWindow(BOOL bShow, UINT nStatus)
{
CMDIChildWnd::OnShowWindow(bShow, nStatus);

if (bShow) {
WINDOWPLACEMENT sWndPos;
sWndPos.length = sizeof(WINDOWPLACEMENT);
sWndPos.flags = 0;
sWndPos.showCmd = SW_SHOWMAXIMIZED;
SetWindowPlacement(&sWndPos);
}
}