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Creating ActiveX Controls

Posted on 2000-02-23
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Last Modified: 2010-05-02
How do I maintain the methods and properties of an existing VB control.
I am trying to create a "new" VB control which is based on the existing Combo box but wish to keep all of its default properties and methods
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Question by:GScott
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paulstamp earned 50 total points
ID: 2551513
Using the VB control builder wizard you can automatically map them, otherwise you need to one by one add property let and property get statements, ie

Public Property Get Listindex() as Integer

   Listindex = combo1.listindex

End Property

Public Property Let Listindex(byval nIndex as integer)

    '@@@ need error trapping here
    combo1.listindex = nIndex

End Property

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Author Comment

by:GScott
ID: 2551535
Thanks Paul (by the way where is the Control Builder Wizard?)
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Expert Comment

by:Erick37
ID: 2551537
From Books Online:

"Using the ActiveX Control Interface Wizard
The ActiveX Control Interface Wizard can assist you in determining what properties to provide, and in delegating to the appropriate constituent controls.
After you have placed all the constituent controls you’re going to use on your UserControl, start the wizard and select your control. The wizard will examine your constituent controls, and produce a list of all the properties, methods, and events that appear in all their interfaces, plus those in the UserControl object’s interface, and the standard properties listed above. You can select from this list those properties, methods, and events you want in your control’s interface.
The wizard will produce default mappings of your control’s properties to properties of the UserControl object or of constituent controls. In subsequent steps, you can modify these mappings.
When you have finished determining your control’s interface and delegating to existing properties, the wizard will generate property procedure code to implement the properties, using the correct data types for standard properties, and including delegation code for all your property mappings, enormously reducing the amount of work required to generate a full-featured control."
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Expert Comment

by:Erick37
ID: 2551549
The Wizard is an Add-In and can be selected thru Add-Ins->Add-In Manager
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Author Comment

by:GScott
ID: 2551572
Thanks to Erick37
Unfortunately the answer was supplied by paulstamp a minute before your answer was received.
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