SetUnhandledExceptionFilter不生效

参考文档：https://blog.csdn.net/kevin3683/article/details/19040809

分析发现SetUnhandledExceptionFilter 返回值不为空，可能是被其他覆盖，设置后调用如下函数：

SetUnhandledExceptionFilter(WinCrashUnhandledExceptionFilter);

    void * addr = (void*)GetProcAddress(LoadLibraryA("kernel32.dll"),"SetUnhandledExceptionFilter");
    if (addr)
    {    
        unsigned char code[16];
        int size = 0;
        code[size++] = 0x33;
        code[size++] = 0xC0;
        code[size++] = 0xC2;
        code[size++] = 0x04;
        code[size++] = 0x00;

        DWORD oldFlag, tmpFlag;
        VirtualProtect(addr, size, PAGE_READWRITE, &oldFlag);
        WriteProcessMemory(GetCurrentProcess(), addr, code, size, NULL);
        VirtualProtect(addr, size, oldFlag, &tmpFlag);
    }