INT 2F - Btrieve Multi-User - EXECUTE Btrieve OPERATION

	AX = AB01h
	BX = process ID
	DS:DX -> 38-byte parameter record (see #03840 at INT 7B"Btrieve")
Return: AL = status
	    00h OK
	    other retry after calling INT 7F/AX=0200h
SeeAlso: AX=AB00h"Btrieve",AX=AB02h"Btrieve",INT 7B"Btrieve",INT 7F/AX=0200h