Problem for Resizing and Repainting Window

I use Codejock 11.2 and VC++6.0.

Please Follow me....
I open the pane sample of Codejock samples and execute,

1 Step: make a command for resizing window size. for example, make ID_RESIZEWINSIZE  in view submenu.
2 Step: Generate Message Map for Command and Function. for example, OnResizeWinSize()
3 Step: Add a code Resizing Window Size using MoveWindow Function.
BOOL CMainFrame::OnResizeWinSize()
{
   CRect rc;
   GetWindowRect(&rc);
   rc.right -= 100;
   rc.bottom -= 100;
   MoveWindow(&rc, TRUE);
}