public static bool IsScreenLocked()
{
var h = CGSessionCopyCurrentDictionary();
if (h == IntPtr.Zero)
{
throw new ApplicationException("Not running within Quartz GUI session");
}
using (var d = new CFDictionary(h, true))
{
var kCGSSessionScreenIsLocked = new CFString("CGSSessionScreenIsLocked");
var locked = CFDictionary.GetBooleanValue(d.Handle, kCGSSessionScreenIsLocked.Handle);
return(locked);
}
}