wince/mobile 控制音量

copy from：http://www.pinvoke.net/default.aspx/coredll/waveOutSetVolume.html

 

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 waveOutGetVolume(IntPtr device, ref int 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); }

}