//////////////////////////////////////////////////////////////////////////////
// MFC Tip #7 -- Vision X Software -- http://www.visionx.com/mfcpro
// Sizing an MDI Child Window
//
// This source code is provided for instructional purposes, and is released
// to the public domain. No claim of ownership is made. Use it at your own
// risk. No warranties are expressed or implied. The resulting program may
// not be fully functional. No animals were used to test this code.
//////////////////////////////////////////////////////////////////////////////

    // Get the parent frame window. This CWnd function searches up the
    // parent chain until a CFrameWnd (or derived class) object is found.
    CFrameWnd *pFrame = GetParentFrame();

    // Get the size of the client portion of the window.
    CRect cRect;
    pFrame->GetClientRect( &cRect );

    // Get the size of the entire window.
    CRect wRect;
    pFrame->GetWindowRect( &wRect );

    // Calculate the new window size by subtracting out the client
    // size, and adding 100 (we want the *client* area to be 100).
    wRect.right  = wRect.right  - cRect.Width()  + 100;
    wRect.bottom = wRect.bottom - cRect.Height() + 100;

    // Now resize the window. Ta-da!
    pFrame->SetWindowPos( NULL, 0, 0, Rect.Width(), wRect.Height(), 
                          SWP_NOZORDER | SWP_NOMOVE);