//EXTERNAL LOCATION
private void ExternalToolStripMenuItem_Click(object sender, EventArgs e)
{
Form external = new FrmExternal();
external.MdiParent = this;
external.Show();
}
private void StripBtnExternal_Click(object sender, EventArgs e)
{
Form external = new FrmExternal();
external.MdiParent = this;
external.Show();
}