// Bring all values to default
private void Reset()
{
TxtClientNumber.ResetText();
CmbAuthors.ResetText();
CmbBooks.ResetText();
NumInterval.Value = 30;
}
// Show only the books of the selected author...
private void CmbAuthors_SelectedIndexChanged(object sender, EventArgs e)
{
FillCmbBooks();
CmbBooks.ResetText();
}