How do I reset a control from the big RED X?

[Nobody/Anonymous]

I am using windows forms and have add an openglcontrol on a control. I am trying to learn this and so I have been playing with a program that selectively lets me apply openGL commands to this window so that I can try and teach myself.  The problem is that when I try something stupid like GL.glEnd() with no GL.glBegin  I get a big red X on the graphics control.  What I have not been able to do is figure out if there is any way of resetting this control within the program. 

Also is this big red X an openGL generated thing, a windows forms control thing, or a CsGL thing.  Any help or nudges in the correct direction would be helpful...

Thanks

[Lloyd Dupont]

nice X, it isn't ?
there is no way to reset that.
and this peace of code of mine is quite controversed.
after calling glDraw() I call OpenGLException.Assert(), and bing....
hack that, remove it !....

[Nobody/Anonymous]

B-E-A-U-T-I-F-U-L X ..just not what I want :-)
Hmm....not sure if I am quite up to the task of hacking it yet!

Thanks for the quick reply...

Mike in Paradise,NL

[Lloyd Dupont]

Not too hard.
open CsGL/OpenGL/OpenGLControl.cs
look for OnPaint()
remove the last line.
double-clic on buildcs.bat.
that's it !

good luck :-)

[Nobody/Anonymous]

Great...That did it...I changed that code as follows

//Comment out original
//OpenGLException.Assert();
// test OpenGL engine ...
uint error = GL.glGetError();
if(error != GL.GL_NO_ERROR)
{
MessageBox.Show("GL Error "+error+" Cleared");
}

Thanks again for the quick response..

Mike in Paradise,NL