Format of HSCMP parameter block:
Offset	Size	Description	)
 00h	WORD	0005h (length of following data)
 02h	DWORD	comparison color
 06h	BYTE	logical operation
		00h True
		01h pel > testcolor
		02h pel == testcolor
		03h pel < testcolor
		04h False
		05h pel >= testcolor
		06h pel <> testcolor
		07h pel <= testcolor