Category: <b>MS Windows</b>
<br>Flags: Undocumented function<p>
<pre><b>INT 2F - MS Windows v3.0 - INSTALLATION CHECK</b>

	AX = 4680h
Return: AX = result
	    0000h MS Windows 3.0 running in real (/R) or standard (/S) mode,
		  or DOS 5 DOSSHELL active
	    nonzero  no Windows, Windows prior to 3.0, or Windows3 in enhanced
		  mode
Note:	Windows 3.1 finally provides an installation check which works in all
	  modes (see AX=160Ah)
SeeAlso: AX=1600h,AX=160Ah
</pre>