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waveOutSetVolume (coredll)
 

coredll is for smart devices, not desktop Windows. Therefore, this information only applies to code using the .NET Compact Framework. To see if information for waveOutSetVolume in other DLLs exists, click on Find References to the right.

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Summary
This function sets the output audio volume of the pocket pc device.

C# Signature:

[DllImport("coredll.dll", SetLastError=true)]
protected static extern int waveOutSetVolume(IntPtr device, uint volume);

VB Signature:

Declare Function waveOutSetVolume Lib "coredll.dll" (ByVal device As IntPtr, ByVal volume As Integer) As Integer

User-Defined Types:

None.

Notes:

values for 'volume' are between value between 0 (off) and 65536 (max)

if there is only one audio device, you can set 'device' to null (or IntPtr.Zero)

Tips & Tricks:

Please add some!

Sample Code:

  // The volume to pass in (0xffff or 65535 equals max volume)
  uint newVolume = (uint)0xffff;

  // Set this value in the left and right channels
  uint NewVolumeAllChannels = ((( uint )newVolume & 0x0000ffff) | (( uint )newVolume << 16));

  // Call func to set volume.
  waveOutSetVolume(IntPtr.Zero, NewVolumeAllChannels);

RichardW
Fixed the example code. It didn't work because the range of volume values are 0 to 65535 and the value passed in the example was 65536, which is set the right volume to 1 (out of 65535) and the left volume to 0.
RichardW
Fixed the example code. It didn't work because the range of

volume values are 0 to 65535 and the value passed in the example was

65536, which is set the right volume to 1 (out of 65535) and the left

volume to 0.

But I create this example below.

  public enum Volumes : int {

public enum Volumes : int {

    OFF = 0,
    LOW = 858993459,
    NORMAL = 1717986918,
    MEDIUM = -1717986919,
    HIGH = -858993460,
    VERY_HIGH = -1
}

}

[DllImport("coredll.dll", SetLastError=true)]
internal static extern int waveOutSetVolume(IntPtr device, int volume);

[DllImport("coredll.dll", SetLastError=true)]

internal static extern int waveOutSetVolume(IntPtr device, int volume);

[DllImport("coredll.dll", SetLastError=true)]
internal static extern int waveOutGetVolume(IntPtr device, ref int volume);

[DllImport("coredll.dll", SetLastError=true)]

internal static extern int waveOutGetVolume(IntPtr device, ref int volume);

public static Volumes Volume {

public static Volumes Volume {

    get {
    int v = (int)0;
    waveOutGetVolume(IntPtr.Zero, ref v);
    switch (v) {
        case (int)Volumes.OFF: return Volumes.OFF;
        case (int)Volumes.LOW: return Volumes.LOW;
        case (int)Volumes.NORMAL: return Volumes.NORMAL;
        case (int)Volumes.MEDIUM: return Volumes.MEDIUM;
        case (int)Volumes.HIGH: return Volumes.HIGH;
        case (int)Volumes.VERY_HIGH: return Volumes.VERY_HIGH;
        default: return Volumes.OFF;
    }
     }
     set { waveOutSetVolume(IntPtr.Zero, (int)value); }
}

}

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