RichTextBox flickers when using HideSelection property

[Sakharam Phapale]

Hi All,

When I runs following code RichTextBox control on form flickers.
I don't know why it's so?
Is any idea to avoid flickering?

private void cmdBold_Click(object sender, System.EventArgs e)

{
RtbData.HideSelection =true;
int intCounter;
int intEnd=RtbData.SelectionStart + RtbData.SelectionLength;
for (intCounter=RtbData.SelectionStart ;intCounter<intEnd
;intCounter++ )
{
RtbData.Select (intCounter,1);
System.Drawing.Font fOld;
fOld= RtbData.SelectionFont;
FontStyle fStyle;
fStyle= fOld.Style ^ FontStyle.Bold;
RtbData.SelectionFont = new System.Drawing.Font (
fOld.FontFamily, fOld.Size, fStyle);
}
RtbData.HideSelection =false;
}

Thanks and Regards,
Sakharam Phapale