求助各位大虾，用vb编写上位界面，除了编写以下程序外，还需要做什么？
第一步：申明dll
Declare Function OpenPmacDevice Lib "pmac.dll" (ByVal pmac As Long) As Long
Declare Function ClosePmacDevice Lib "pmac.dll" (ByVal pmac As Long) As Long
Declare Function PmacGetResponseA Lib "pmac.dll" (ByVal pmac As Long, ByVal response$, ByVal dummy As Integer, ByVal com_string$) As Long

第二步：连接Pmac
m_bDriverOpen = 0
'connect device
'The PMAC device number is 0 for the first PMAC in your system, 1 for
'the second and so on.
m_dwDevice = 0
m_bDriverOpen = OpenPmacDevice(m_dwDevice)
……

第三步：y轴正转
Dim response As String * 2
Call PmacGetResponseA(0, response, 2, "#2j+")

第四步：断开链接
Call ClosePmacDevice(0)

大虾，我以前没做过这种连接，也没用过PMAC卡，这些是在网上看的，不知道对不对，请问应该怎么做啊？

谢谢了！
再请教各位大虾：
我没有光盘，只有安装软件，是否在软硬件的安装目录下能找到相应的底层函数，
是否还需要硬件程序安装引导？