ATL_IDM_FIRST_MDICHILD  901 third_party/wtl/include/atlframe.h 				else if(wID >= ATL_IDM_FIRST_MDICHILD && wID <= ATL_IDM_LAST_MDICHILD)   // MDI child windows
ATL_IDM_FIRST_MDICHILD 1575 third_party/wtl/include/atlframe.h 	HWND CreateMDIClient(HMENU hWindowMenu = NULL, UINT nID = ATL_IDW_CLIENT, UINT nFirstChildID = ATL_IDM_FIRST_MDICHILD)