INT 15 - DESQview v2.20+ - "GETCRIT" - GET CRITICAL NESTING COUNT
	AX = DE13h
Return: BX = number of calls to BEGINC or ENTERC
	      (see INT 15/AX=101Bh,INT 15/AX=DE1Ch) without matching ENDC
	      (see INT 15/AX=101Ch)
Note:	this API(Application Program[ming] Interface) The defined set of calls which a program may make to interact with or request services of the operating system or environment under which it is running.  Because the inputs and outputs of the calls are well-defined, a program using the API can continue using the identical calls even if the internal organization of the program providing the API changes. call may be made from within a hardware interrupt handler
SeeAlso: AX=101Bh,AX=101Ch,AX=DE1Bh,AX=DE1Ch