Total focus on a Form: ignore all others

in my VB.NET application, my main Form can show other Forms. That works fine, but I need to set "focus" on the newly opene开发者_开发技巧d form, and don't allow the user use the main form until the opened Form is closed. How do I do that?

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The Form.ShowDialog() method shows a form as a dialog box; this should keep the focus on that form until it is closed (by the user or your code).

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Use the Form.ShowDialog() method.

It will show you the form as a dialog box, so focusing is at total, and it will ignore all other forms or objects.