VBEx .net use of .dll

[John H.]

I'm trying to create a .dll in VB Express with multiple functions and subs.

For the .dll program, I create a class module with:
Public Class Class1

Public Function ReturnOne(ByRef MyVar As Integer) As Integer
MyVar = 1
End Function
Public Sub ReturnString(ByRef MyVar As String)
MyVar = "ABCDEF"
End Sub
End Class

For the caller, I create a form with buttons:
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim MyVar1 As Integer
ReturnOne(MyVar1)
TextBox1.Text = MyVar1.ToString
End Sub

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim MyVar2 As String = "ABCD"
ReturnString(MyVar2)
TextBox1.Text = MyVar2
End Sub
End Class

Along with the form, I have a module with:
Module Module1
Public Declare Function ReturnOne Lib "C:\...\Test_DLL.dll" (ByRef MyVar1 As Integer) As Integer
Public Declare Sub ReturnString Lib "C:\...\Test_DLL.dll" (ByRef MyVar2 As String)
End Module

Upon execution, it tells me that it cannot find the entry point in the .dll. What am I missing?

TIA

John

 

[JuggaloBrotha]

This is just a guess, have you tried:

Public Shared Class Class1

? I think that'll tell it that the functions are all general and that it doesn't need an entry point. Or it could be that I don't understand the situation enough.

 

[John H.]

I tried that and the compiler told me that classes can't be shared. Any other ideas? I'm desperate!!!

 

[JohnH]

Building a Class Library Component and Consumer Client Application with VB.NET

 

[John H.]

Great article! Sure wish I had seen it before reading those other 9,265,129 (or was it 9,265,128?) articles on the web.

I think that my problem was not creating an instance of my class.

Thanks for the help.