private void A_TextChanged(object sender, EventArgs e)
{
A.SelectionStart = 0;
A.SelectionLength = A.TextLength;
}
private void A_Click(object sender, EventArgs e)
{
A.SelectionStart = 0;
A.SelectionLength = A.TextLength;
}
private void textBox1_Click(object sender, EventArgs e) { textBox1.SelectionStart = 0; textBox1.SelectionLength = textBox1.TextLength; }