Menustrip in MDI child form doesn't show when run

You tell me that you are creating a textbox in the child but the textbox is not showing. If you are asking for help with that, then be sure to add the control to the form's control collection. For example the following will create and show a form with a textbox in it.

Form Form2 = new Form();

Form2.MdiParent = this;

TextBox tb = new TextBox();

tb.Dock = DockStyle.Fill;

tb.Multiline = true;

Form2.Controls.Add(tb);

Form2.WindowState = FormWindowState.Maximized;

Form2.Show();

Do you have VS 2008 also so you can try it with that?
 
Can you provide simple instructions for reproducing the problem?