private void btnOk_Click(object sender, EventArgs e)
{
// If there's a validation function, check and only set if valid, otherwise assume all text is valid.
if (EntryValidation != null)
{
if (!EntryValidation.Invoke(tbInput.Text)) // Validation fails.
{
MessageBox.Show("Invalid Entry!", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
}
Hide();
}