使用Windows API控制系统音量及静音代码,CSharp代码库,德仔网

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【CSharp】使用Windows API控制系统音量及静音

作者:三角猫 / 发布于2011/7/20/ 854

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实现的代码如下：
<h3>一、引入API定义</h3>
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[<span style="color: rgb(43,145,175)">DllImport</span>(<span style="color: rgb(163,21,21)">"user32.dll"</span>, CharSet = <span style="color: rgb(43,145,175)">CharSet</span>.Auto, SetLastError = <span style="color: blue">true</span>)]
<span style="color: blue">static extern </span><span style="color: rgb(43,145,175)">IntPtr </span>SendMessage(<span style="color: rgb(43,145,175)">IntPtr </span>hWnd, <span style="color: blue">uint </span>Msg, <span style="color: blue">uint </span>wParam, <span style="color: blue">uint </span>lParam);

<span style="color: blue">const uint </span>WM_APPCOMMAND = 0x319;
<span style="color: blue">const uint </span>APPCOMMAND_VOLUME_UP = 0x0a;
<span style="color: blue">const uint </span>APPCOMMAND_VOLUME_DOWN = 0x09;
<span style="color: blue">const uint </span>APPCOMMAND_VOLUME_MUTE = 0x08;</pre>
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<h3>二、 提高音量</h3>

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SendMessage(<span style="color: blue">this</span>.Handle, WM_APPCOMMAND, 0x30292, APPCOMMAND_VOLUME_UP * 0x10000);</pre>
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<h3>三、 降低音量</h3>
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SendMessage(<span style="color: blue">this</span>.Handle, WM_APPCOMMAND, 0x30292, APPCOMMAND_VOLUME_DOWN * 0x10000);</pre>
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<h3>四、 静音与恢复（执行2次恢复原状态）</h3>
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SendMessage(<span style="color: blue">this</span>.Handle, WM_APPCOMMAND, 0x200eb0, APPCOMMAND_VOLUME_MUTE * 0x10000);</pre>
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