Creating Visual Basic DLLs

Creating Visual Basic DLLs

Is it possible to create DLLs in Visual Basic? If so, how?

For example, I want a DLL with a function that can accept 2 integer arguments and returns a boolean value afterwards. How can I call this DLL from another project during runtime. That is, I want the DLL separate from the actual project so if I decide to change the DLL file, I don’t have to recompile the original project.

Is this possible with VB? I’m using VB5 right now.

To make a DLL, you first start by creating an ActiveX DLL project, which is available in both VB 5 and 6. A DLL is made up of one or more classes, and one code module with this Sub Main:

Sub Main' no code requiredEnd Sub

Make sure you set the StartupObject to Sub Main for the library to operate properly.

You then create your class with whatever public methods and properties you want. Compile it, and then you can reference your library in another project. In fact, if you add a Standard EXE project to your workspace, you can trace through the DLL as it is executed.

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