/// <summary>
/// method for setting the volume to a specific level
/// </summary>
/// <param name="volumeLevel">volume level we wish to set volume to</param>
public static void SetSystemVolume(int volumeLevel)
{
try
{
int curVolume;
int mixerCtrl;
//create a new volume control
VolumeStructures.MixerStruct volumeCtrl = new VolumeStructures.MixerStruct();
//open the mixer control
WinXPSystem.mixerOpen(out mixerCtrl, 0, 0, 0, 0);
//set the type to volume control type
int controlType = VolumeConstants.MIXERCONTROL_CONTROLTYPE_VOLUME;
//get the current mixer control and get the current volume
GetSystemMixer(mixerCtrl, VolumeConstants.MIXERLINE_COMPONENTTYPE_DST_SPEAKERS, controlType, out volumeCtrl, out curVolume);
//Check for volume level. If the volume level
//is greater than the maximum level then set the volume to
//the maximum level. If it's less than the minimum level
//then set it to the minimun level
if (volumeLevel > volumeCtrl.lMaximum)
{
volumeLevel = volumeCtrl.lMaximum;
}
else if (volumeLevel < volumeCtrl.lMinimum)
{
volumeLevel = volumeCtrl.lMinimum;
}
//set the volume
SetSystemMixer(mixerCtrl, volumeCtrl, volumeLevel);
//now re-get the mixer control
GetSystemMixer(mixerCtrl, VolumeConstants.MIXERLINE_COMPONENTTYPE_DST_SPEAKERS, controlType, out volumeCtrl, out curVolume);
//make sure the volume level is equal to the current volume
if (volumeLevel != curVolume)
{
throw new Exception("Cannot Set Volume");
}
//close the mixer control as we are finished with it
WinXPSystem.mixerClose(mixerCtrl);
}
catch (Exception ex)
{
ChefmateLogger.Instance.LogError("SetSystemVolume", ex.Message);
}
}
/// <summary>
/// method for retrieving the current volume from the system
/// </summary>
/// <returns>int value</returns>
public static int GetSystemVolume()
{
//method level variables
int curVolume;
int mixerCtrl;
//create a new volume control
VolumeStructures.MixerStruct mixer = new VolumeStructures.MixerStruct();
//open the mixer
WinXPSystem.mixerOpen(out mixerCtrl, 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
GetSystemMixer(mixerCtrl, VolumeConstants.MIXERLINE_COMPONENTTYPE_DST_SPEAKERS, type, out mixer, out curVolume);
//close the mixer control since we are now done with it
WinXPSystem.mixerClose(mixerCtrl);
//return the current volume to the calling method
return(curVolume);
}
