private void movies__btn_Click(object sender, EventArgs e)
{
this.Hide();
MoviesForm movies_form = new MoviesForm();
movies_form.Show();
}
private void ShowMoviesBtn_Click(object sender, EventArgs e)
{
foreach (Form frm in this.MdiChildren)
{
frm.Close();
}
MoviesForm form = new MoviesForm {
MdiParent = this,
Dock = DockStyle.Fill
};
form.Show();
Slider.Top = ShowMoviesBtn.Top;
Slider.Height = ShowMoviesBtn.Height;
}