How to open one form when click on menu strip in MDI form

 Just Double click on New Menu Item eg. ABC and Write down the following Code.

private void mnuABC_Click(object sender, EventArgs e)
{
frmForm1 oFrm = new frmForm1();
oFrm.StartPosition = FormStartPosition.CenterScreen;
oFrm.ShowDialog(this);
oFrm.Dispose();
oFrm = null;
}

Hi

http://www.c-sharpcorner.com/UploadFile/mma1979/how-to-access-mdiparent-controls-from-child-forms/

http://www.c-sharpcorner.com/UploadFile/manish1231/creating-an-mdi-child-form-in-C-Sharp/

http://www.c-sharpcorner.com/UploadFile/84c85b/building-mdi-winforms-application-using-C-Sharp/