C# Signature:

[DllImport("winmm.dll", SetLastError=true, CallingConvention=CallingConvention.Winapi)]
public static extern uint waveOutSetVolume(int uDeviceID, uint dwVolume);
public static extern int waveOutSetVolume(int uDeviceID, int dwVolume);

[DllImport("winmm.dll", SetLastError=true, CallingConvention=CallingConvention.Winapi)]
public static extern uint waveOutSetVolume(IntPtr uDeviceID, uint dwVolume);
public static extern int waveOutSetVolume(IntPtr uDeviceID, int dwVolume);

VB Signature:

Declare Auto Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As IntPtr, ByVal dwVolume As UInteger) As UInteger
Declare Auto Function waveOutSetVolume Lib "winmm.dll" (ByVal uDeviceID As Integer, ByVal dwVolume As Integer) As Integer

User-Defined Types:

None.

Alternative Managed API:

Do you know one? Please contribute it!

Notes:

VB - Use "Auto" in the Declare statement to have VB automatically marshal strings using the proper coding. ANSI is default.

Tips & Tricks:

Please add some!

Sample Code:

    // Each volume setting must be in the range between &H0 (silence) and &HFFFF (maximum volume).
    // ' Set the volume for all channels to &H7FFF (50%)
    // retval = waveOutSetVolume(0, &H7FFF7FFF)  ' for both channels, if needed
    public void SetVolume(uint volume)
    public void SetVolume(int volume)
    {
        if (m_WaveOut != IntPtr.Zero)
        WaveNative.waveOutSetVolume(m_WaveOut,volume);
    }

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