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Asked: 2026-05-11T09:09:31+00:00

My mdi VB.Net application performs a long operation on some data. Ideally I should

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My mdi VB.Net application performs a long operation on some data. Ideally I should use a separate thread to prevent the dreaded “Not Responding” message.

My problem is if I use a separate thread users then have the ability to click on other controls in the application which can directly affect the operation my background thread is working on, creating an error.

Is there any way to prevent all the mdi windows, toolbars and other controls from receiving mouse clicks and keyboard input during my background thread’s operation?

Or is there a way to clear the message que before performing a Application.DoEvents?

Thanks

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1 Answer

  1. I would say that the best choice when you don’t want a user to click on a control is to set Enabled to False for that control.

    CLARIFICATION: Setting Enabled to False for a parent control will also disable any children. So, setting Enabled to False on the main window and and MDI windows, will do the trick.

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