【求帮助】VC如何调用按键精灵插件？？？

#define QMPLUGIN_API extern "C" __declspec(dllexport)
typedef int (*QMPLUGIN_HANDLER)(char *lpszParamList, char *lpszRetVal);
typedef struct {
      char *m_lpszCommandName;
      char *m_lpszCommandDescription;
      QMPLUGIN_HANDLER m_pHandlerFunction;
      UINT m_nParamNumber;
} QMPLUGIN_CMD_INFO;
typedef QMPLUGIN_CMD_INFO* (*CommandFunc)(int iCommandNum);
      HINSTANCE thDll;
      thDll = LoadLibrary("xxxxxplugin.dll");
      if (thDll != NULL)
      {
          CommandFunc someFunc = (CommandFunc)GetProcAddress(thDll, "GetCommand");
          if (someFunc != NULL)
          {
              QMPLUGIN_CMD_INFO* abc = someFunc(0);
              printf("the function description is %s\n", abc->m_lpszCommandDescription);
          }else
          {
              printf("Load Function Error\n");
          }
          FreeLibrary(thDll);
      }else{
          printf("Load DLL Error\n");
      }
这是别人做过的源码，但是我想知道有了这个源码以后如何调用？？？？
比如在按键精灵里后台模拟按键是Call Plugin.Bkgnd.KeyPress(Hwnd, 53)，那么在VC里这个源码后面该怎么写？？？
求大神帮助