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  • delphi 控制音量 静音的类

    unit ttSound;
    
    interface
    
    uses winapi.windows, winapi.Messages;
    
    type
    SimpleSoundControl = class
    class procedure Mute(); static;
    class procedure VolumeUp(); static;
    class procedure VolumeDown(); static;
    end;
    
    implementation
    
    { SimpleSoundControl }
    
    class procedure SimpleSoundControl.Mute;
    begin
    keybd_event(VK_VOLUME_MUTE, MapVirtualKey(VK_VOLUME_MUTE, 0), KEYEVENTF_EXTENDEDKEY, 0);
    keybd_event(VK_VOLUME_MUTE, MapVirtualKey(VK_VOLUME_MUTE, 0), KEYEVENTF_EXTENDEDKEY or KEYEVENTF_KEYUP, 0);
    end;
    
    class procedure SimpleSoundControl.VolumeDown;
    begin
    keybd_event(VK_VOLUME_DOWN, MapVirtualKey(VK_VOLUME_DOWN, 0), KEYEVENTF_EXTENDEDKEY, 0);
    keybd_event(VK_VOLUME_DOWN, MapVirtualKey(VK_VOLUME_DOWN, 0), KEYEVENTF_EXTENDEDKEY or KEYEVENTF_KEYUP, 0);
    end;
    
    class procedure SimpleSoundControl.VolumeUp;
    begin
    keybd_event(VK_VOLUME_UP, MapVirtualKey(VK_VOLUME_UP, 0), KEYEVENTF_EXTENDEDKEY, 0);
    keybd_event(VK_VOLUME_UP, MapVirtualKey(VK_VOLUME_UP, 0), KEYEVENTF_EXTENDEDKEY or KEYEVENTF_KEYUP, 0);
    end;
    
    end.
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  • 原文地址:https://www.cnblogs.com/westsoft/p/9908556.html
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