DLL檔如何於模組裡宣告?(編號:6423)

請問這是一個由VC++ LINK 出來的檔, 該如何於 VB6 的模組裡宣告
檔名: IOPORT.DLL 裡的一個 FUNCTION
//-------------------------------------------------------// FUNCTION:IOP_Read(int port, LPSTR buffer, int count)
//
// PORPOSE:Read characters from a specified serial port.
//--------------------------------------------------------
DWORD APIENTRY IOP_Read(int port, LPSTR buffer, int count)
{
BOOL fReadStat ;
  DWORD dwError;
  DWORD dwBytesRead ;
  
  memset( buffer, 0x0, 256 ) ;   

fReadStat = ReadFile( COMDEV[port], buffer, count,
          &dwBytesRead, &READ_OS ) ;
if (!fReadStat)
  {
    if (GetLastError() == ERROR_IO_PENDING)
    {
     // We have to wait for read to complete
     while(!GetOverlappedResult( COMDEV[port],
            &READ_OS, &dwBytesRead, TRUE ))
     {
       dwError = GetLastError() ;
       if (dwError == ERROR_IO_INCOMPLETE)
        return (dwBytesRead) ;
       else
       return (FAIL) ;  
     }
    }
    else
     return (FAIL) ;
  }   
  
  return (dwBytesRead) ;
}