private void Mute()
{
try
{
VolumeManager volume = GetVolumeManager();
if (volume != null && !volume.IsMute)
{
volume.IsMute = true;
oldMuteState = false;
}
}
catch { }//浏览器已打开但未载入网页
}
private VolumeManager GetVolumeManager()
{
if (volumeManager == null)
{
//获得浏览器进程的窗口句柄
IntPtr browserHwnd = NativeMethods.FindWindowEx(mainForm.Browser.Handle, IntPtr.Zero, null, null);
if (browserHwnd == IntPtr.Zero)
{
return(null);
}
//获得浏览器进程的PID
uint processID;
NativeMethods.GetWindowThreadProcessId(browserHwnd, out processID);
if (processID == 0U)
{
return(null);
}
volumeManager = new VolumeManager(processID);
}
return(volumeManager);
}