)
Values asynchronous notification routine defined by man.stream 8Ah called with:
	ES:DI = handle of window
	DS:SI is 32-bit value set by 8Bh manager stream opcode
	   mailbox contains message indicating event
	      Opcode
	       40h  horizontal movement
		   DWORD object handle of window
		   BYTE	 new row
		   BYTE	 new col
	       41h  vertical movement
		   DWORD object handle of window
		   BYTE	 new row
		   BYTE	 new col
	       42h  horizontal size change
		   DWORD object handle of window
		   BYTE	 new rows
		   BYTE	 new cols
	       43h  vertical size change
		   DWORD object handle of window
		   BYTE	 new rows
		   BYTE	 new cols
	       44h  scrolled horizontally
		   DWORD object handle of window
		   BYTE	 mouse row within window
		   BYTE	 mouse column within window
		   BYTE	 field mouse is on, 0 if none
		   BYTE	 amount moved: >0 right, <0 left, 0 done
	       45h  scrolled vertically
		   DWORD object hande of window
		   BYTE	 mouse row within window
		   BYTE	 mouse column within window
		   BYTE	 field mouse is on, 0 if none
		   BYTE	 amount moved: >0 down, <0 up, 0 done
	       46h  window close request
		   DWORD object handle of window
		   BYTE	 mouse pointer row
		   BYTE	 mouse pointer column
		   BYTE	 field mouse is on, 0 if none
	       47h  application's windows hidden
	       48h  Help for Program selected
		   DWORD object handle of window
		   BYTE	 mouse pointer row
		   BYTE	 mouse pointer column
		   BYTE	 field mouse is on, 0 if none
	       49h  pointer message sent to window
		   DWORD pointer handle which received message
	       4Ah  switched to window from another ("raise")
	       4Bh  switched away from the window ("lower")
	       4Ch  video mode changed
		   BYTE new BIOS video mode
	       4Dh  Scissors/cUt selected
		   DWORD object handle of window
		   BYTE	 row of upper left corner
		   BYTE	 column of upper left corner
		   BYTE	 field number ul corner is in, 0=none
		   DWORD handle of orphaned window created with
			 copy of data from specified region
		   BYTE	 height of region
		   BYTE	 width of region
	       4Eh  Scissors/Copy selected
		   DWORD object handle of window
		   BYTE	 row of upper left corner
		   BYTE	 column of upper left corner
		   BYTE	 field number ul corner is in, 0=none
		   DWORD handle of orphaned window created with
			 copy of data from specified region
		   BYTE	 height of region
		   BYTE	 width of region
	       4Fh  Scissors/Paste selected
		   DWORD object handle of window
		   BYTE	 row of upper left corner
		   BYTE	 column of upper left corner
		   BYTE	 field number ul corner is in, 0=none
		   DWORD handle of orphaned window with data
		   BYTE	 height of region
		   BYTE	 width of region
			Note: orphaned data window should be adopted or freed
				when done
	       50h  main menu about to pop up
	       51h  main menu popped down
Return: all registers unchanged