class WEL_MDI_CLIENT_WINDOW Ancestors WEL_COMPOSITE_WINDOW* WEL_MDI_TILE_CONSTANTS Clients WEL_MDI_CHILD_WINDOW WEL_MDI_CLIENT_WINDOW WEL_MDI_FRAME_WINDOW Suppliers INTEGER_32 STRING_32 STRING_8 WEL_CLIENT_CREATE_STRUCT WEL_COMPOSITE_WINDOW* WEL_MDI_CHILD_WINDOW WEL_MDI_CLIENT_WINDOW WEL_MENU