C++ 动态链接库有关问题

C++ 动态链接库问题
大家好，我在写一个C++动态链接库，软件已经给了，就是从软件中抓取所需要的函数，但是这个动态链接库中所需要的WriteData23xx函数在另外一个动态库中，于是我就是用句柄打开这个动态库，但是一直出错。
void WriteData() 
{
  int ret;
unsigned char buf[136];
  HINSTANCE hDll; //DLL句柄
  lpAddFun addFun; //读取函数指针
  lpAddFun1 addFun1; //写入函数指针

buf[0]=0xFF;buf[1]=0xFF;buf[2]=0x10;buf[3]='Q';
  buf[4]='e';buf[5]='r';buf[6]='t';buf[7]=0x15;
//ret=WriteData23xx(1,buf,136);
  hDll = LoadLibrary("..\\Debug\\EasyUSB23xx.dll");
if(addFun!=NULL)
{
addFun = (lpAddFun)GetProcAddress(hDll,"WriteData23xx");
{  
ret =addFun(1,buf,136);
}
FreeLibrary(hDll);
}

Sleep(100);
ZeroMemory(buf,136);
//ret=ReadData23xx(0,buf,136);
hDll = LoadLibrary("..\\Debug\\EasyUSB23xx.dll");
if(addFun1!=NULL)
{
addFun1 = (lpAddFun1)GetProcAddress(hDll,"ReadData23xx");
{  
ret =addFun1(0,buf,136);
}
FreeLibrary(hDll);
}

Sleep(100);
if(ret!=8)
{
//MessageBox("数据保护卡工作不正确，请查验原因 ！","提示");
}
else
{
//MessageBox("已写入ID ！","提示");
}
}

出错如下所示：
:\Documents and Settings\Administrator\桌面\getid\Getid\lib.cpp(390) : error C2064: term does not evaluate to a function
C:\Documents and Settings\Administrator\桌面\getid\Getid\lib.cpp(403) : error C2064: term does not evaluate to a function
C:\Documents and Settings\Administrator\桌面\getid\Getid\lib.cpp(436) : error C2064: term does not evaluate to a function
C:\Documents and Settings\Administrator\桌面\getid\Getid\lib.cpp(448) : error C2064: term does not evaluate to a function
执行 cl.exe 时出错.

lib.obj - 1 error(s), 0 warning(s)


------解决方案--------------------
addFun1 = (lpAddFun1)GetProcAddress(hDll,"ReadData23xx"); 这个步骤成功没？估计没成功？