检测dll是32/64位？（直接读dll文件包含的某几个字节进行判断）

检查dll是32位还是64位？

#include "stdafx.h"
#include <Windows.h>

int _tmain(int argc, _TCHAR* argv[])
{
    BYTE buf[4];
    FILE *fp = fopen("D:\plugin_d.dll", "rb");
    fseek(fp, 0x40-4, 0);
    fread(buf, sizeof(char), 4, fp);

    int a = int(buf[0]);
    int b = int(buf[1])*256;
    int c = int(buf[2])*256*256;
    int d = int(buf[3])*256*256*256;
    int sum = a+b+c+d;
    fseek(fp, sum+4, 0);

    BYTE bufMachine[2];
    fread(bufMachine, sizeof(char), 2, fp);

    int machine = (int)bufMachine[0] + (int)(bufMachine[1])*256;

    if(machine == 0x14C)//332
    {
        printf("32 bit
");
    }
    else if(machine == 0x8664)//34404
    {
        printf("64 bit
");
    }
    else
    {
        printf("Unknow bit
");
    }

    //system("pause");
    getchar();
    return 0;
}

https://blog.csdn.net/hellokandy/article/details/73863510