VB如何调用C语言编写DLL文件中函数

[wangbin1986]

此函数如何调用？
BOOL WINAPI GX_GetMonitorData(unsigned short* ChannelNo,unsigned char* IsFinish,unsigned char* pMonitorData,unsigned short*DataLen,unsigned short Len);

我的代码：
Declare Function GX_GetMonitorData Lib "GxMonitor.dll" (ByRef ChannelNo As Integer, ByRef IsFinish As Integer, ByRef pMonitorData As String, ByRef DataLen As Integer, ByVal Lens As Integer) As Boolean

Dim num As Integer
Dim IsFinish As Integer
Dim DataLen As Integer
Dim cMonitorData As String * 4000

GX_GetMonitorData(num, IsFinish, cMonitorData, DataLen, 65535)