ActiveX Example 3 - Use Components as Business Objects

In this example you create and use two non-visual LANSA ActiveX components (business objects) which provide functionality to manage employee and skills information in the LANSA Personnel System demonstration files:

This example shows you how to:

• Dynamically build and manage objects using collections

• Invoke business rules from the LANSA repository

• Handle messages issued from LANSA

Source that makes up this example:

Name Type Description AXOBJECTA Visual LANSA Component Reusable Part AXOBJECTA AXOBJECTB Visual LANSA Component Reusable Part AXOBJECTB Project1 Visual Basic Project Project Definition Form1 Visual Basic Form Visual Basic - Code Session.cfg Configuration file Session Configuration (Session.cfg)

Refer to Using Components as Business ObjectS for the source code.

Step 1. Add the Visual LANSA Components

In this step you create two non-visual ActiveX LANSA business objects which provide functionality for managing employee information. These objects are used by the Visual Basic form.

1.      Open the LANSA editor and create a new component named AXOBJECTA, type Reusable Part.

2.      Copy and paste into the Visual LANSA Editor the source code for Reusable Part AXOBJECTA into the component.

4.      Use the Set ActiveX Attributes command in the ribbon.

         This step exposes the Visual LANSA component as an ActiveX Control.

5.      Repeat steps 1 to 3 for component Reusable Part AXOBJECTB.

6.      Compile components AXOBJECTB and AXOBJECTA.

Step 2. Add the Visual Basic Form

In this step you create the Visual Basic form which uses the non-visual LANSA ActiveX components to manage employee information in the LANSA Personnel System demonstration files:

1.      Complete the General Setup Tasks to create a new Visual Basic project.

2.      Close Visual Basic.

3.      Start Notepad and open the form (Form<n>.frm) created in the General Setup Tasks.

4.      Replace the code in Notepad the source code from Case 3 - Visual Basic - Object, then Save.

5.      Open the Project (Project<n>.vbp) in your Visual Basic development environment.

6.      Open the form (Form<n>.frm)

7.      Replace the code with the source code from Case 3 - Visual Basic - Code, then Save.

8.      Select the Project menu and then the References…option.

9.      Scroll down and select LANSA.AXOBJECTA and LANSA.AXOBJECTB.  Click OK. This will add a Reference for each object to the project.

         Notes:

• If your Toolbox is not displayed, click View then Toolbox.

• To view the form's user interface, Click View, then click Object from the Menu or by using the Project Pane.

• If you have an empty list at runtime then check the view style, it should be lvwReport

• You do not need to add the LANSA ActiveX business objects to the toolbox or the form.

10.     In the LOAD routine modify the login script below to your requirements. For example:

Call ConnectToLansa("user1", "mypassword", "c:\ActiveXTests\session.cfg")

 

11.     Save, then compile the Visual Basic Project using the Make Project<n>.exe option in the File menu.