如何获得混音器音量

Question

我使用win32api函数编写了一个应用程序来获取和设置混音器音量。我遇到一个问题，需要将混音器音量调到我的应用程序（检索值）。 GetVolume -

public static int GetVolume()  
{  //method level variables  
    int currVolume;  
    int mixerControl;  
    //create a new volume control  
    VolumeStructs.Mixer mixer = new VolumeStructs.Mixer();  
    //open the mixer  
   PCWin32.mixerOpen(out mixerControl, 0, 0, 0, 0);  
    //set the type to volume control type  
    int type = VolumeConstants.MIXERCONTROL_CONTROLTYPE_VOLUME;  
    //get the mixer control and get the current volume level  
     GetMixer(mixerControl, VolumeConstants.MIXERLINE_COMPONENTTYPE_DST_SPEAKERS, type, out mixer, out currVolume);  
   //close the mixer control since we are now done with it  
    PCWin32.mixerClose(mixerControl);  
    //return the current volume to the calling method  
   return currVolume;  
 }