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Editorial Team
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Asked: 2026-05-11T19:27:13+00:00

I have a base Windows Form with a control. I have declared the control

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I have a base Windows Form with a control. I have declared the control to be protected so his siblings will be able to handle properties, methods and events. This form is written in c#.

One of my clients is using VB.NET, and they have created a new inherited form in their project. Everything works fine …

But, When they want to handle the control’s clicked event in vb.net they’re getting this error message:

“Handles clause requires a WithEvents variable defined in the containing type or one of its base types”.

Can anybody tell me what should i do on the c# form to let the inherited form in vb.net use the control events?

Thanks for your help!

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1 Answer

  1. Editorial Team

    Two options:

    • Write some VB which declares a protected WithEvents variable, then decompile it to see what the VB compiler does. (I believe that it makes it a property for one thing, and probably adds a bunch of other bits and pieces.)

    • Tell them not to use a Handles clause – get them to subscribe explicitly in the same way that you would from C#, using AddHandler and AddressOf.

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