INT 15 - DESQview - QEXT.SYS - INSTALLATION CHECK                               
	AX = 11DEh
Return: CF clear if installed
	    AX = segment at which QEXT.SYS is located
Desc:	QEXT.SYS is Quarterdeck's HMAsee High Memory Area manager for DESQview; more recent
	  versions also implement the XMSsee Extended Memory Specification standard
Note:	a private entry point (see #00434) may be found by searching the
	  beginning of the returned segment for the signature string
	  "QUARTERDECK EXTENDED MEMORY MANAGER 286"; the word immediately
	  prior to the signature contains the QEXT version number in BCD(Binary Coded Decimal) A method of data storage where two decimal digits are stored in each byte, one in the upper four bits and the other in the lower four bits.  Since only the values 0 through 9 are used in each half of a byte, BCD values can be read as decimal numbers on a hexadecimal display of memory or a file.,
	  and the word prior to that contains the offset within the QEXT
	  code segment of the private entry point
SeeAlso: INT 2F/AX=4310h"XMSsee Extended Memory Specification",INT 67/AH=3Fh


(Table 00434)
Call QEXT.SYS private entry point with:
	AH = 00h ???
	AH = nonzero ???