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Hi! I'm trying to integrate XNA and the Wiilib. I started creating a new XNA Game project and them mixing the example provided in the library within the game project. I have added on my Game.cs almost the same code that exist in MultipleWiimoteForm.cs. Besides that I created the WiimoteInfo class, which is pratically the same as the one provided except that I removed all components. The idea is to have the skeleton of things on my Game. I could compile everything successfully but when I run the Game I receive: System.InvalidOperationException was unhandled Message="Invoke or BeginInvoke cannot be called on a control until the window handle has been created." Source="System.Windows.Forms" StackTrace: at System.Windows.Forms.Control.MarshaledInvoke(Control caller, Delegate method, Object[ args, Boolean synchronous) at System.Windows.Forms.Control.BeginInvoke(Delegate method, Object[ args) at XAnimationTest.WiimoteInfo.UpdateState(WiimoteChangedEventArgs args) in C:\Documents and Settings\Server\Desktop\Caio\XAnimationTest\XAnimationTest\WiimoteInfo.cs:line 38 at XAnimationTest.Game1.wm_WiimoteChanged(Object sender, WiimoteChangedEventArgs e) in C:\Documents and Settings\Server\Desktop\Caio\XAnimationTest\XAnimationTest\XAnimationTest\Game1.cs:line 352 at WiimoteLib.Wiimote.OnReadData(IAsyncResult ar) at System.IO.FileStream.AsyncFSCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* pOverlapped) at System.Threading._IOCompletionCallback.PerformIOCompletionCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* pOVERLAP) InnerException: How can I fix this? Regards,

You shouldn't need to use Invoke/BeginInvoke within XNA...just call the methods directly.

That was me who posted the topic above.

Instead of:

BeginInvoke(new UpdateWiimoteStateDelegate(UpdateWiimoteChanged), args);

Should I call only UpdateWiimoteChanged this way:

UpdateWiimoteChanged(args);

?

If so, should I remove the delegate(s) declaration which is on top of WiimoteInfo.cs (see below) ?

private delegate void UpdateWiimoteStateDelegate(WiimoteChangedEventArgs args);
private delegate void UpdateExtensionChangedDelegate(WiimoteExtensionChangedEventArgs args);

Thanks in advance,

That is correct.

 Thank you very much!