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Editorial Team
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Asked: 2026-05-22T16:36:55+00:00

I’ve created a derived WinForm textbox control that knows how to provide a hint

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I’ve created a derived WinForm textbox control that knows how to provide a hint (those grayed out words that say things like “Password” or “Enter search here”) as well as allowing for the beep on enter to be disabled.

I have two public properties BeepOnEnter, and HintText, a single method – ResetHint and then overrides for the Text property, the OnGotFocus event and the OnKeyPress event.

This code works fine until I have a need for a textbox on a tool strip also known as a ToolStripTextBox.

I’d like to use the same code for both the TextBox AND the ToolStripTextBox. Is there a way minimize/reduce redundancy? I definitely need code that has classes that are derived from TextBox and ToolStripTextBox so the ui designer allows me to drop these new controls on a form or tool strip but can’t figure out how to do it in an OO way.

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1 Answer

  1. Editorial Team

    ToolStripTextBox is derived from ToolStripControlHost and TextBox is derived from TextBoxBase and as multiple inheritance is not allowed, you will be best off creating a 3rd utility class and putting all similar functions in it. You can then leverage an instance of this class in your derived controls to get the common functionality you want.

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