64bit OS인지 체크 하는 코드. (IsWow64Process())

BOOL IsWow64Process(
  [in]  HANDLE hProcess,
  [out] PBOOL  Wow64Process
);

 

#include <windows.h>
#include <stdio.h>

typedef BOOL (WINAPI *LPFN_ISWOW64PROCESS) (HANDLE, PBOOL);

BOOL IsWow64()
{
    BOOL bIsWow64 = FALSE;

    LPFN_ISWOW64PROCESS fnIsWow64Process = (LPFN_ISWOW64PROCESS)GetProcAddress(
        GetModuleHandle(TEXT("kernel32")),"IsWow64Process");
  
    if (NULL != fnIsWow64Process)
    {
        if (!fnIsWow64Process(GetCurrentProcess(),&bIsWow64))
        {
            // handle error
        }
    }
    return bIsWow64;
}

void main()
{
    if(IsWow64())
        printf("Running on WOW64\n");
    else printf("Running on 32-bit Windows\n");
}

 

출처: https://learn.microsoft.com/en-us/windows/win32/api/wow64apiset/nf-wow64apiset-iswow64process