look in your blitz program directory here:
C:\Program Files\Blitz3D\samples\mak\driver\driver.bb
that is if you have the samples, and assuming it is with the current build as Stevie says.
C:\Program Files\Blitz3D\samples\mak\driver\driver.bb
that is if you have the samples, and assuming it is with the current build as Stevie says.