Vb. The simplest example of DLL authoring and invocation in net

DLL (dynamic link library) is a very useful thing, in the development of large projects, it is very important, because many people in cooperation development, you can assign a task to each person, with the DLL to complete, the final combination, there will be no conflicting issues. Here is the simplest example of DLL writing and invocation, I am not high level, you crossing mock not a.

First, we open vb.net, select Class Library, change the name to test
Then we enter the following code

Public Class Test

Public Function Test (ByVal A as long, ByVal B as long) as long

Return A + b

End Function

End Class

After saving, build the DLL file.




This is the simplest DLL, the following is an example of calling the DLL

Create a new project, click Project--Add Reference




Locate the DLL you just built, double-click it



After adding the reference, it seems like nothing happened, then we enter the following code:

Imports Test.test

In this way, the class that contains the DLL is included.

Then we define a class

Dim Test as New test.test

In this way, you can use the function inside, here is the program example

Imports Test.test

Public Class Form1

Private Sub Form1_Load (ByVal sender as System.Object, ByVal e as System.EventArgs) Handles MyBase.Load

Dim Test as New test.test

MsgBox (Test.test (1, 2))

End Sub

End Class




Running the program, you can see that the function inside the DLL is called.

This is the simplest example of a DLL, and we can integrate some of the complex code into the DLL, which is easier to upgrade or reuse later.

Vb. The simplest example of DLL authoring and invocation in net