libZPlay documentation (Win32)
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ZPlay::SetMasterVolume Method

Set external volume.

C++
bool SetMasterVolume(int LeftVolume, int RightVolume);
Parameters 
Description 
int LeftVolume 
Specifies volume for left channel. Volume range is from 0 to 100. 
int RightVolume 
Specifies volume for right channel. Volume range is from 0 to 100. 
Return Values 
Description 
True 
All OK. 
False 
Error. To get error message read here

This function will change wave out device driver volume affecting all volume on computer. 

Note: Use player volume control if you need to control volume of specific song. 

Copyright (c) 2010. Zoran Cindori - All rights reserved.

Web: http://libzplay.sourceforge.net/

Email: zcindori@inet.hr