delphi 调节音量代码

unit UnitVolumeWin7;

interface

uses messages, Windows, Forms;

///

/// 增大音量

///

procedure VolumeUp;

///

/// 减小音量

///

procedure VolumeDown;

///

/// 切换静音

///

procedure VolumeMute;

implementation

procedure VolumeUp;

begin

SendMessage(Application.Handle, WM_APPCOMMAND, $30292, APPCOMMAND_VOLUME_UP * $10000);

end;

procedure VolumeDown;

begin

SendMessage(Application.Handle, WM_APPCOMMAND, $30292, APPCOMMAND_VOLUME_DOWN * $10000);

end;

procedure VolumeMute;

begin

SendMessage(Application.Handle, WM_APPCOMMAND, $200EB0, APPCOMMAND_VOLUME_MUTE * $10000);

end;

end.

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