c++ builder 调用动态库 显示加载

//先将库文件拷贝到项目文件夹

#include <iostream>
using namespace std;

int _tmain(int argc, _TCHAR* argv[])
{   HINSTANCE hHandle;
    typedef float (__stdcall * MY_FUNC)(float,float);
    MY_FUNC func;
    hHandle=LoadLibraryW(L"Mydll.dll");
    if (hHandle==NULL)
    { cout<<"can not Load dll" <<endl;
      return -1;
    }
    func=(float(__stdcall *)(float,float)) GetProcAddress(hHandle,"sum" );
    if (func==NULL)
    { cout<<"can not find dll function" <<endl;
      return -1;
    }
    cout<<func(1,2)<<endl;
    FreeLibrary(hHandle);
    system("pause");
    return 0;
}