Object in use exception when accessing a Graphics object

[Martin]

Hi,

I have create a Graphics object from a HWND
Both the Window and the Graphics object are created by the same thread,
nevertheless when i dispose the object, I get an exception indicating that
the object is in use some where else.

Any comments?

Best regards
Martin

P.S.: Code looks like:

myGraphics=Graphics.FromHwnd(Parent.Parent.Handle) ;
parentColorValue=GetPixel(myGraphics.GetHdc(),1,To p+(Height/2));
myGraphics.Dispose();

P.P.S: exception in detail:

A first chance exception of type 'System.InvalidOperationException' occurred
in system.drawing.dll

Additional information: The object is currently in use elsewhere.