private void button1_Click(object sender, System.EventArgs e)
{
button1.BackColor = SystemColors.Control;
RichTextBoxFinds options = 0;
int end = atb.TextLength - 1;
int start = atb.SelectionStart + atb.SelectionLength;
if (checkBox1.Checked)
{
options |= RichTextBoxFinds.MatchCase;
}
if (checkBox2.Checked)
{
options |= RichTextBoxFinds.WholeWord;
}
if (checkBox3.Checked)
{
options |= RichTextBoxFinds.Reverse;
end = start - 1;
start = 0;
}
if (checkBox4.Checked)
{
options |= RichTextBoxFinds.NoHighlight;
}
int pos;
string pat = lastfind = comboBox1.Text;
pos = atb.Find(pat, start, end, options);
if (pos != -1)
{
atb.Select(pos, pat.Length);
atb.ScrollToCaret();
}
else
{
button1.Enabled = false;
}
}