vb如何调用c++语言编写的dll函数？

欲调用此函数
BOOL WINAPI GX_GetMonitorData(unsigned short* ChannelNo,unsigned char* IsFinish, unsigned char* pMonitorData,unsigned short*DataLen,unsigned short Len);

在模块中加入
Declare Function GX_GetMonitorData Lib "*.dll" (ByRef ChannelNo As Long, ByRef IsFinish As Long, ByRef pMonitorData As Long, ByRef DataLen As Long, ByVal Lens As Long) As Boolean

1.在工程－引用中将asdfg.dll引用过来 2.dim AAA as asdfg 'asdfg是类模块的名称 Private Sub Form_Load() dim x Set AAA = New asdfg x = AAA.zxc(参数1,参数2)'参数1，2自己写 End Sub 建议你了解一下下面dll的制作方法，理解就更透彻了。下面内容来自百度。 1.新建一个ActiveX Dll,工程名字为vbmytestdll,类模块名字为mytestdll 2.类模块内容只有一个函数,主要返回DLL的HELLO WORLD Public Function dlltest1() As String dlltest1 = "HELLO WORLD" End Function 3.保存,生成DLL,名字为 vbmytestdll.dll 4.新建一个EXE工程,在菜单: 工程---引用---浏览里找到vbmytestdll.dll,把它引用进来 5.EXE工程代码如下: Option Explicit Dim testdll As mytestdll'类模块名字 Private Sub Form_Load() Set testdll = New mytestdll 'DLL的一个新实例 Me.Caption = testdll.dlltest1 '我的标题=返回DLL的HELLO WORLD End Sub OK,编译成EXE即可看到效果.