richtextbox have scroll but checkbox inside not scrolling

richtextbox have scroll but checkbox inside not scrolling

Inside my richtextbox have a checkbox, when scroll down my richtextbox,
checkbox not scrolling.
CheckBox chk = new CheckBox();
chk.Name = "Chk" + i;
chk.Location = new Point(80,10+i);
chk.Text = "Save";
chk.Size = new System.Drawing.Size(20, 100);
richTextBox1.Controls.Add(chk);
i++;
Can you tell me how to solve it.