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Asked: 2026-05-11T11:54:29+00:00

I have a small form that displays some progress information. Very rarely I have

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I have a small form that displays some progress information.
Very rarely I have to show a rather long message and I want to be able to resize this form when needed so that this message fits in the form.

So how do I find out how wide string S will be rendered in font F?

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  1. It depends on the rendering engine being used. You can basically switch between GDI and GDI+. Switching can be done by setting the UseCompatibleTextRendering property accordingly

    When using GDI+ you should use MeasureString:

    string s = 'A sample string';  SizeF size = e.Graphics.MeasureString(s, new Font('Arial', 24));

    When using GDI (i.e. the native Win32 rendering) you should use the TextRenderer class:

    SizeF size = TextRenderer.MeasureText(s, new Font('Arial', 24));

    See this article: Text Rendering: Build World-Ready Apps Using Complex Scripts In Windows Forms Controls

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