RichTextBox RichTextBox RichTextBox Constructor


Initializes a new instance of the RichTextBox class.

public RichTextBox ();
Public Sub New ()


The following code example creates a RichTextBox control that loads an RTF file into the control and searches for the first instance of the word "Text." The code then changes the font style, font size, and font color of the selected text and saves the changes back to the original file. The example code finishes by adding the control to its Form. This example requires that the method created in the example code is added to a Form class and called from the constructor of the form. The example also requires that an RTF file is created, in the root of the C drive, containing the word "Text."

   void CreateMyRichTextBox()
      RichTextBox^ richTextBox1 = gcnew RichTextBox;
      richTextBox1->Dock = DockStyle::Fill;

      richTextBox1->LoadFile( "C:\\MyDocument.rtf" );
      richTextBox1->Find( "Text", RichTextBoxFinds::MatchCase );

      richTextBox1->SelectionFont = gcnew System::Drawing::Font(
         "Verdana", 12, FontStyle::Bold );
      richTextBox1->SelectionColor = Color::Red;

      richTextBox1->SaveFile( "C:\\MyDocument.rtf",
         RichTextBoxStreamType::RichText );

      this->Controls->Add( richTextBox1 );
public void CreateMyRichTextBox()
    RichTextBox richTextBox1 = new RichTextBox();
    richTextBox1.Dock = DockStyle.Fill;

    richTextBox1.Find("Text", RichTextBoxFinds.MatchCase);

    richTextBox1.SelectionFont = new Font("Verdana", 12, FontStyle.Bold);
    richTextBox1.SelectionColor = Color.Red;

    richTextBox1.SaveFile("C:\\MyDocument.rtf", RichTextBoxStreamType.RichText);


Public Sub CreateMyRichTextBox()
    Dim richTextBox1 As New RichTextBox()
    richTextBox1.Dock = DockStyle.Fill
    richTextBox1.Find("Text", RichTextBoxFinds.MatchCase)
    richTextBox1.SelectionFont = New Font("Verdana", 12, FontStyle.Bold)
    richTextBox1.SelectionColor = Color.Red
    richTextBox1.SaveFile("C:\MyDocument.rtf", RichTextBoxStreamType.RichText)
End Sub


By default, the Multiline property of the control is set to true.

Applies to

See also