C++动态加载DLL调用方法

一、构建DLL路径

  char szTmp[_MAX_PATH];

  char* szPath = getcwd(szTmp, _MAX_PATH);//获取当前工作目录
  //构建dll路径
 
  strcat(szTmp, DLLNAME);
 
  TCHAR wLocation[_MAX_PATH] = { 0 }; 
 
  MultiByteToWideChar(0, 0, szTmp, _MAX_PATH, wLocation, _MAX_PATH * 2);
 

二、加载DLL

//dll资源加载

HINSTANCE hActive = LoadLibrary(wLocation);

三、调用DLL中函数

typedef void (_stdcall *pfnGetStatus)(long*);

bool CLASSNAME::IsActive()

{

    long lStatus = ;

    pfnGetStatus Func = (pfnGetStatus)GetProcAddress(hActive, "GetStatus");

    if(!Func)

    {

        // Error;

    }

    else

    {

        Func(&lStatus);

    }

    return lStatus;

} 

四、释放DLL

    if(hActive != NULL)

    {

        FreeLibrary(hActive);

    }