Class TMDIClient    Inherits from Class TWindow
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 DATA
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 aWnd                 Array of TMDIChild objects

 METHODS
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 New                  Generic constructor method
 Tile                 Tile Child windows
 Cascade              Cascade child windows
 ArrangeIcons         Arrange all minimized document child windows. It does
                      not affect child windows that are not minimized.
 NextWindow           Activate the child window immediately behind the
                      currently active child window and place the currently
                      active child window behind all other child windows.
 GetActive            Retrieves the TMDIChild window that is active.
 Add                  Add an TMDIChild object to ::aWnd instance array.
 ChildNew             Creates an New TMDIChild object an add it to ::aWnd
 ChildActivate        Activate a different TMDICchild window.
 ChildMaximize        Maxize a TMDICchild window.
 ChildRestore         Restore a TMDICchild window.
 ChildDestroy         Destroy a TMDICchild window.