INT 15 - TopViewTopView, DESQview, TaskView, OmniView, other compatibles - "GETVER" - GET VERSION
	AX = 1022h
	BX = 0000h
Return: BX nonzero, TopViewTopView, DESQview, TaskView, OmniView, other compatibles or compatible loaded
	(BL = major version, BH = minor version)
Notes:	TaskView returns BX = 0001h, DESQview v2.00+ returns BX = 0A01h