private void Box2_KeyPress(object sender, KeyPressEventArgs e)
{
//Only Accept a ':', a '-', a numeral, a - f / A - F, or backspace
if (IsValidChar(e.KeyChar) || e.KeyChar.ToString() == ":" || e.KeyChar.ToString() == "-" || Char.IsDigit(e.KeyChar) || e.KeyChar == 8)
{
//If the key pressed is a ':' or '-'
if (e.KeyChar.ToString() == ":" || e.KeyChar.ToString() == "-")
{
//If the Text is valid move to the next box
if (Box2.Text != "" && Box2.Text.Length != Box2.SelectionLength)
{
Box3.Focus();
}
e.Handled = true;
}
//If we are not overwriting the whole text
else if (Box2.SelectionLength != Box2.Text.Length)
{
//Check that the new Text value will be valid
// then move on to next box
if (Box2.Text.Length == 1)
{
if (e.KeyChar != 8)
{
KeyPressBuffer.KeyChar = e.KeyChar;
Box3.Focus();
}
}
}
}
//Do nothing if the keypress is not a hex value, backspace, '-', or ':'
else
{
e.Handled = true;
}
}
