I am trying to make a game run smoothly on fast and slow systems. The best way I have found to do this is to modify the screen resolution and the bpp according to the user''s system. I need a way to check the user''s computer for his/her ram and video card ....and then change the resolution and bpp according to the inquiry.

To check the memory on win32 systems, call GlobalMemoryStatus() (check the MSDN for info on it)

Btw: what the heck is alphanumeric? just letters & digits?