How do I disable an item in a listbox [duplicate]

This question already has answers here: Closed 11 years ago.

Possible Duplicate:

WinForms ListBox with readonly/disabled items

How do I disable a single item in a listbox? I still want it to show, but the user cant choose it as an i开发者_如何学编程tem. Do I need to write my own disable() function? If I do, any pointers on how it would work?

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see WinForms ListBox with readonly/disabled items