Passing Structures from C++ to a VB .NET DLL

[gstarr]

I'm having trouble getting the correct syntax for passing a structure from C++ to VB .NET.

I have a VB .Net DLL program with the following code:

Public Structure testParams
Public iFirst As Integer
Public iSecond As Integer
End Structure

Public Class clsKpdUI
Public Function ShowForm(ByVal Param1 As testParams) As Integer
' Code
End Function
End Class

I have C++ program with the following code:

struct testParams {
int iFirst;
int iSecond;
};

kpdUI::clsKpdUI myUI;
testParams tp;
tp.iFirst = 4;
tp.iSecond = 3;
myintR = myUI.ShowForm3(tp);

When I try to compile the C++ code, I get the following Error:
Error 1 error C2664: 'kpdUI::clsKpdUI::ShowForm' : cannot convert parameter 1 from 'testParams' to 'kpdUI::testParams' c:\test\Form1.h 133 TestKpdUIcpp

How do I correct this error?