private void SetBackButton_Click(object sender, EventArgs e)
{
BackFormcs dialog = new BackFormcs();
dialog.Owner = this;
dialog.ApplyHandler += new EventHandler(setColour);
dialog.Show();
}
private void setColour(object sender, System.EventArgs e)
{
BackFormcs dialog = (BackFormcs)sender;
this.BackColor = Color.FromArgb(dialog.Red, dialog.Green, dialog.Blue);
}