Is it possible to design a control of my own in c#

I would like to de开发者_StackOverflow中文版sign a richTextBox control of my own with rounded rectangular edges or liek some other is it possible to customize this

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Yes it is.

Add a new UserControl and then inherit from the existing RichTextBox. You will have to override the onPaint method to create a richtextbox with rounded corners.

This article here may help you. It is based on a TextBox control (in VB) rather than a RichTextBox Control.

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yes by using the user Control you can also inherits an existing control and changing it