FIX: CFormView Does Not Change Child Positions on WM_MDINEXT (122184)

RESOLUTION

Modify the MFC source code and re-build the libraries. To re-build the libraries, please follow the steps outlined in the section titled "How to Build Other Library Versions" in the Class Library User's Guide.

NOTE: If you are rebuilding the MFC DLL (for example, MFC250D.DLL), you should also rename the DLL. This is also mentioned in MFC TechNote #33.

The changes necessary are in the file VIEWSCRL.CPP. In this file you will find two calls to ScrollWindow -- one in the ScrollToDevicePosition function and other in the OnScrollBy function. Replace the call to ScrollWindow in each of these functions with the following code; note that the first two lines are different in each function:

  // In ScrollToDevicePosition use the following two lines :
        int xAmount = xOrig - ptDev.x;
        int yAmount = yOrig - ptDev.y;
  // In OnScrollBy use the following two lines:
        int xAmount = -(x-xOrig);
        int yAmount = -(y-yOrig);
  // The rest of the following replacement code is the same in
  // both functions:
        if (IsWindowVisible())
        {
           // When visible, let Windows do the scrolling
           ScrollWindow(xAmount, yAmount);
        }
        else
        {
           // Windows does not perform any scrolling if the window
           // is not visible.  This leaves child windows unscrolled.
           // To account for this oversight, the child windows are
           // moved directly instead.
           HWND hWndChild = ::GetWindow(m_hWnd, GW_CHILD);
           if (hWndChild != NULL)
           {
             for (; hWndChild != NULL;
                hWndChild = ::GetNextWindow(hWndChild, GW_HWNDNEXT))
             {
               CRect rect;
               ::GetWindowRect(hWndChild, &rect);
               ScreenToClient(&rect);
               ::SetWindowPos(hWndChild, NULL,
               rect.left+xAmount, rect.top+yAmount, 0, 0,
               SWP_NOSIZE|SWP_NOACTIVATE|SWP_NOZORDER);
             }
            }
          }