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Changing font in RichTextBox's Text

Updated: Category: Winforms Controls
Author: Member Level: GoldPoints: 10

This article helps to clearing the concept of how to Changing font in RichTextBox's Text

This code sample shows how to find out and changing the font of a single word in RichTextBox.

private void FindAndChangeFont(RichTextBox ptxtRichTextBox, string pstrFind)
if(ptxtRichTextBox != null)
System.Drawing.Font fntFont = new Font("Verdana",10f, System.Drawing.FontStyle.Bold,System.Drawing.GraphicsUnit.Point,178,false);
int i = ptxtRichTextBox.Find(pstrFind);
int j = pstrFind.Length;
ptxtRichTextBox.Select(i, j);
ptxtRichTextBox.SelectionFont = fntFont;
catch(Exception ex)

//Calling above fucntion
private void button6_Click(object sender, System.EventArgs e)
richTextBox1.Text = "";
string strFind = "dotnetspider";
FindAndChangeFont(richTextBox1, strFind);

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