How to change System.Windows.Forms.ToolStripButton highlight/background color when checked?

Question

I have a ToolStripButton that is used as a radio button. When it is checked, a blue outline surrounds the button, but there is no background color. It is not clear enough fo

Answer 1

on Event click for every toolStripButton

private void toolStripButton4_Click(object sender, EventArgs e)
        {
            toolStrip1.Items[0].BackColor = SystemColors.ActiveCaption;
            toolStrip1.Items[1].BackColor = SystemColors.Control;
            toolStrip1.Items[2].BackColor = SystemColors.Control;
            toolStrip1.Items[3].BackColor = SystemColors.Control;

        }