DLLImports

  • Thread starter Thread starter John Dann
  • Start date Start date
J

John Dann

One detail about using DLLImports as part of the PInvoke process that
I don't understand:

I'm trying to access a function (eg MyFunction) in a 3rd party DLL so
I create a class:

Imports System.Runtime.InteropServices
Public Class Myclass
<DllImport("MyDLL")> _
Public Shared Function MyFunction()
End Function
End class

Then is there some way of calling MyFunction from within Myclass?

The only way I can get it to work at present is to instantiate Myclass
in another class and then call MyFunction via oMyclass.MyFunction.

JGD
 
John Dann said:
One detail about using DLLImports as part of the PInvoke process
that I don't understand:

I'm trying to access a function (eg MyFunction) in a 3rd party DLL
so I create a class:

Imports System.Runtime.InteropServices
Public Class Myclass
<DllImport("MyDLL")> _
Public Shared Function MyFunction()
End Function
End class

Then is there some way of calling MyFunction from within Myclass?

The only way I can get it to work at present is to instantiate
Myclass in another class and then call MyFunction via
oMyclass.MyFunction.
Click to expand...

Why? What happens if you call it within Myclass? BTW, I think it is not
really MyClass because it is a reserved word, or it is "public class
[Myclass]". There is also the return type missing. Anyway, I have no problem
calling Myfunction within the class:

Public Class Myclass
<DllImport("MyDLL")> _
Public Shared Function MyFunction() As Integer
End Function

Sub test()
Dim i As Integer
i = MyFunction()
End Sub
End class




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Armin

How to quote and why:
http://www.plig.net/nnq/nquote.html
http://www.netmeister.org/news/learn2quote.html
 
John,

* John Dann said:
One detail about using DLLImports as part of the PInvoke process that
I don't understand:

I'm trying to access a function (eg MyFunction) in a 3rd party DLL so
I create a class:

Imports System.Runtime.InteropServices
Public Class Myclass
<DllImport("MyDLL")> _
Public Shared Function MyFunction()
End Function
End class

Then is there some way of calling MyFunction from within Myclass?
Click to expand...

'MyClass' is a keyword, so don't call the class 'MyClass'.
The only way I can get it to work at present is to instantiate Myclass
in another class and then call MyFunction via oMyclass.MyFunction.
Click to expand...

\\\
<class name>.<function name>(<arguments>)
///

You don't need an instance.
 
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