Handle
TextBox.ModifiedChanged[
^] events.
When user has enter enough text, you can set focus to the next TextBox.
private void TextBox1_TextChanged(object sender, EventArgs e)
{
this.textBox1.Modified = false;
if (this.textBox1.Text.ToUpper() == "AGREE")
{
Control nextInTabOrder = GetNextControl(this, true);
nextInTabOrder.Focus();
}
}