C++判斷操作系統是32位還是64位

C++判斷操作系統是32位還是64位：

1. BOOL Is64Bit_OS()
2. {
3. BOOL bRetVal = FALSE;
4. SYSTEM_INFO si = { 0 };
5. LPFN_PGNSI pGNSI = (LPFN_PGNSI) GetProcAddress(GetModuleHandle(_T("kernel32.dll")), "GetNativeSystemInfo");
6. if (pGNSI == NULL)
7. {
8. return FALSE;
9. }
10. pGNSI(&si);
11. if (si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64 ||
12. si.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_IA64 )
13. {
14. bRetVal = TRUE;
15. }
16. else
17. {
18. //32 位操作系統
19. _tprintf(_T("is 32 bit OS\r\n"));
20. }
21. return bRetVal;
22. }