private void button20_Click(object sender, EventArgs e)
{
HeightBox.Clear();
LengthBox.Clear();
WidthBox.Clear();
AreaBox.Clear();
PermiterBox.Clear();
VolumeBox.Clear();
}
//WidthBox Validation
private void WidthBox_Validating(object sender, CancelEventArgs e)
{
string errorMsg;
if (!ValidWidth(WidthBox.Text, out errorMsg))
{
//Cancel the event and select the text to be corrected by the user.
e.Cancel = true;
WidthBox.Select(0, WidthBox.Text.Length);
//Set the ErrorProvider error with the text to display.
this.errorProvider1.SetError(WidthBox, errorMsg);
}
}
