程式判斷Windows系統是32bit還是64bit

http://msdn.microsoft.com/en-us/library/ms684139%28VS.85%29.aspx

或者是通過讀取系統資料庫

HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Control/Session Manager/Environment

鍵值 PROCESSOR_ARCHITECTURE可以判斷出來