Question

How do I handle right click in RichTextBox in C#?

For example:

When I right-click mouse over a RichTextBox the program will display a MessageBox.

Answer 1

You have to catch Mouse_Down event, not Mouse_Click as follows:

private void richTextBox1_MouseDown(object sender, MouseEventArgs e)
{
    if (e.Button == System.Windows.Forms.MouseButtons.Right)
    {
        MessageBox.Show("you got it!");
    }
}