private void artistesButton_Click(object sender, RoutedEventArgs e)
{
if (mArtistes == null)
{
mArtistes = new Artistes();
mArtistes.Closed += new EventHandler(mArtistes_Closed);
}
mArtistes.Hide();
mArtistes.Show();
}
void mArtistes_Closed(object sender, EventArgs e)
{
mArtistes = null;
}
