How to check if my pc is 32 bit or 64 bit

Hi i have know read alot of the topics about this, and ppl are saying use @OSArch, or @ProssereArch, but non of them is in my AutoIt? can any one help me with a command, so i can check if my pc is 32 bit or 64 bit? im making a script for my work, where we need to install programmes diffrent if 32 bit then 64 bit.

Best Regards
Patrick Ølholm