Int 2F Fn 4B20  - Ms Windows 3+ - Win.com - Set Program To Execute On Exi  [W]

   AX = 4B20h

Return: AX = 0000h if successful
       DX:CX -> 256-byte buffer for pathname and commandline (see #2510)

Notes: when the Windows function ExitWindows is called with an exit code of
     44h, WIN.COM executes the program specified in the returned buffer
     and then restarts Windows
   the returned address is a real-mode segment:offset value

See Also: AX=4B21h

Format of WIN.COM buffer:
Offset Size    Description (Table 2510)
 00h 128 BYTEs commandline for program (count byte, command tail, 0Dh)
 80h 128 BYTEs ASCIZ pathname of program to execute

Note:  the order above is for a Windows95 DOS box; it may be reversed under
     Windows 3.x