Hi,
I program opengl with VB.
When I start my program on Windows2000 the performance was very good, then I changed my OS to Windows XP and now my program is much slower!!
What can be the problem??
Most likely the XP boxes only use the display driver that ships with XP. This driver doesnt support OpenGL, so you only get software rendering on those systems.
In order to get hardware accelerated OpenGL you neeed to download and install the drivers from the 3d card manufacturer (for example www.nvidia.com or www.ati.com)..)