"如何在VB中处理输出参数为UINT8*和UINT16*的DLL函数"

Question

C++ 代码：

BOOL ReadVersion(UINT8 *MajorVersion, UINT8 *MinorVersion1, UINT16 *MinorVersion2, UINT16 *MinorVersion3)

我们将介绍 *MajorVersion,*MinorVersion1,*MinorVersion2,*MinorVersion3 如何调用并从 vb.net 获取输出。

带有 func def 的 VB.net DLL 导入：

<DllImport("eCAMFwSw.dll", CharSet:=CharSet.Unicode, CallingConvention:=CallingConvention.Cdecl)>

Public Shared Function ReadVersion(ByVal MajorVersion() As Byte,
                                               ByVal MinorVersion1() As Byte,
                                               ByVal MinorVersion2() As UInt16,
                                               ByVal MinorVersion3() As UInt16) As Boolean

vb.net 代码：

Dim FWVer1(),FWVer2() As Byte

Dim FWVer3(),FWVer4() As UInt16

ReadVersion(FWVer1, FWVer2, FWVer3, FWVer4)

出现错误：访问冲突写入位置 0x0000000000000000。