1<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 2<HTML> 3<HEAD> 4<META http-equiv="Content-Type" content="text/html; charset=windows-1252"> 5<title>SNDEX_SetVolumeSwitchCallback</title> 6<link rel="stylesheet" href="../../css/nitro.css" type="text/css"> 7</HEAD> 8<BODY> 9<H1>SNDEX_SetVolumeSwitchCallback <IMG src="../../image/TWL.gif" width="24" height="12" border="0" align=middle></H1> 10 11<H2>Syntax</H2> 12<DL> 13<DD><CODE>#include <twl/snd.h></CODE></DD> 14<DD><PRE><CODE>void SNDEX_SetVolumeSwitchCallback( SNDEXCallback callback, void* arg );</CODE></PRE></DD> 15</DL> 16 17<H2>Arguments</H2> 18<TABLE> 19<TBODY> 20<TR> 21<TH width="25%"><SPAN class="argument">callback</SPAN></TH> 22<TD width="75%"><A href="SNDEXCallback.html"><CODE>SNDEXCallback</CODE></A>-type function that will be notified when the volume button on the TWL console is pressed.</TD> 23</TR> 24<TR> 25<TH width="25%"><SPAN class="argument">arg</SPAN></TH> 26<TD width="75%">Argument to pass to the function specified in <SPAN class="argument">callback</SPAN>.</TD> 27</TR> 28</TBODY> 29</TABLE> 30<H2>Description</H2> 31<P> 32Sets the callback function to be notified when the volume button on the TWL console is pressed. 33</P> 34<P> 35Note that a PXI receive interrupt will send notification when the volume button is pressed, so callbacks will not occur if PXI receive interrupts are prohibited. 36</P> 37<P> 38If other processing related to extended sound features is running when the volume button is pressed, the callback will not occur. 39</P> 40 41<H2>Note</H2> 42<P>SNDEX functions cannot be used because exclusive control is used during callback execution. Returns <CODE>SNDEX_RESULT_EXCLUSIVE</CODE> even if called. 43 44<H2>See Also</H2> 45<P> 46<A href="SNDEXCallback.html"><CODE>SNDEXCallback</CODE></A> 47</P> 48 49<H2>Revision History</H2> 50<P> 512008/10/10 Standardized terminology and added information about restrictions when a callback is executing.<BR> 2008/06/30 Initial version. 52</P> 53<hr><p>CONFIDENTIAL</p></body> 54</HTML>
