Is _WINDOWHANDLE working properly?

[RhoSigma]

I played with _SCREENEXISTS, but on my machine it didn't seem to always prevent to problem, so I went back to using _DELAY.  In Terry's code using it didn't work for me either.  Perhaps I'm calling it wrong.  Here's how I was calling it:

DO: LOOP UNTIL _SCREENEXISTS

- Dav

And when you combine both as shown in the SCREENEXISTS wiki example?

I mean it might be hard for the GL thread to set up the screen, if the main program does use all CPU power in a tight busy loop.