The COM control provides you with another option for invoking Chameleon from Visual Basic. In this case, you will need to modify the code of your Visual Basic form in the following manner:

Dim WithEvents Engine As HL7Engine

The Stubcode Generation Wizard will generate the control for you automatically the first time. If you ever need to create a project from scratch that supports these controls, you will need to go to the References Window from the menu options by clicking Project > References in Visual Basic:

References Window

The reference you need to include will be called <prefix>Parser, which is implemented in the file called <prefix>Parser.dll. This will be located in a directory called ./<prefix>, just below the location of your message definition file.