public KeyboardListener()
{
//The last hook will be garbage collected if we assign it again
if (_HookID == IntPtr.Zero)
{
_HookID = KeyInterceptor.Hook(HookCallback);
}
}
private IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam)
{
try
{
return(InnerHookCallback(nCode, wParam, lParam));
}
catch (Exception)
{
//Ignore this
}
return(KeyInterceptor.CallNextHookEx(_HookID, nCode, wParam, lParam));
}
private IntPtr InnerHookCallback(int nCode, IntPtr wParam, IntPtr lParam)
{
if (nCode >= 0)
{
if (wParam == (IntPtr)KeyInterceptor.KeyDown)
{
KeyDown(this, new RawKeyEventArgs(Marshal.ReadInt32(lParam), false));
}
else if (wParam == (IntPtr)KeyInterceptor.KeyUp)
{
KeyUp(this, new RawKeyEventArgs(Marshal.ReadInt32(lParam), false));
}
}
return(KeyInterceptor.CallNextHookEx(_HookID, nCode, wParam, lParam));
}
public void Dispose()
{
KeyInterceptor.UnhookWindowsHookEx(_HookID);
}