Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.

What does the Upgrade Wizard create when it encounters ActiveX components in a Visual Basic 6.0 application?

April 26, 2017ActiveX application components create encounters upgrade visual basic Wizard

0

Posted

What does the Upgrade Wizard create when it encounters ActiveX components in a Visual Basic 6.0 application?

1 Answer

0

Posted

The upgrade wizard generates two types of wrappers around each component: • A runtime callable wrapper (RCW): The .NET Framework’s Type Library Importer (Tlbimp.exe) creates a RCW for the ActiveX component and all dependent assemblies. • A Windows Forms wrapper (WFW): A WFW “merges” the ActiveX component’s native properties, methods, and events with those of System.Windows.Forms.AxHost. This is a class that inherits from System.Windows.Forms.Control and exposes ActiveX controls to the .NET Framework as fully functional Windows Forms controls. The upgrade wizard adds these wrappers to the project as DLLs, migrates references to the ActiveX component and its properties, methods, and events, and adds any design-time initializations of the component’s properties to the InitializeComponent method.