private void DivBtn_Click(object sender, EventArgs e)
{
CBox.Text += CEBox.Text + "÷";
CEBox.Clear();
}
private void BackBtn_Click(object sender, EventArgs e)
{
CEBox.Select(CBox.Text.Length, 0);
}
private void CEclearBtn_Click(object sender, EventArgs e)
{
CEBox.Clear();
}
