Category: <b>MS Windows</b>
<br>Flags: callout or callback (usually hooked rather than called)<p>
<pre><b>INT 2F - MS Windows - VIRTUAL DEVICE CALL OUT API</b>

	AX = 1607h
	BX = virtual device ID (see <a href=../../it/42/26.html>#02642</a>)
	CX = (usually) callout subfunction
Return: (usually) AX,BX,CX,DX,ES contain results
Notes:	more of a convention than an API, this call specifies a standard
	  mechanism for Windows enhanced-mode virtual devices (VxD's) to talk
	  to DOS device drivers and TSRs
	see below for details on several virtual devices
SeeAlso: AX=1605h,AX=1607h/BX=000Ch,AX=1607h/BX=0014h,AX=1607h/BX=0015h
SeeAlso: AX=1607h/BX=0018h,AX=1684h"DEVICE API",AX=C020h
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