private IntPtr HwndHook(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
if (OnSessionSwitch == null)
{
return(IntPtr.Zero);
}
// handler of console display state system event
if (msg == WM_POWERBROADCAST)
{
if (wParam.ToInt32() == PBT_POWERSETTINGCHANGE)
{
var s = (POWERBROADCAST_SETTING)Marshal.PtrToStructure(lParam, typeof(POWERBROADCAST_SETTING));
if (s.PowerSetting == GUID_CONSOLE_DISPLAY_STATE)
{
Microsoft.Win32.SessionSwitchReason reason = new Microsoft.Win32.SessionSwitchReason();
switch (s.Data)
{
case (0x0):
reason = Microsoft.Win32.SessionSwitchReason.SessionLock;
break;
case (0x1):
case (0x2):
reason = Microsoft.Win32.SessionSwitchReason.SessionUnlock;
break;
}
Microsoft.Win32.SessionSwitchEventArgs args = new Microsoft.Win32.SessionSwitchEventArgs(reason);
OnSessionSwitch(this, args);
}
}
}
return(IntPtr.Zero);
}
public SessionSwitchEventArgs(Microsoft.Win32.SessionSwitchReason reason)
{
}