private void submitBtn_Click(object sender, EventArgs e) { try { WindowCustomizationUtility.SetInactiveAccentColor((byte)_red, (byte)_green, (byte)_blue); } catch (UnauthorizedAccessException) { MessageBox.Show( Strings.RegistryInaccessibleErrorMessage, Strings.RegistryUpdateErrorTitle, MessageBoxButtons.OK, MessageBoxIcon.Error); } }