INT 15 - DESQview - GET PROGRAM NAME
        AX = DE00h
Return: AX = offset into DESQVIEW.DVO of program most recently selected from
                the "Switch Windows" menu (see below)
Note:   always returns AX=0000h under DESQview/X

Format of program entry in DESQVIEW.DVO:
Offset  Size    Description
 00h    BYTE    length of name (FFh if end of file)
 01h  N BYTEs   name
      2 BYTEs   keys to invoke program (second = 00h if only one key used)
        BYTE    program type
                00h normal program
                04h divider
                80h Delete a Program
                81h Change a Program
        WORD    ??? apparently always 0000h