private void cboUnit_SelectedIndexChanged(object sender, EventArgs e) { if (this.m_CanDo) { for (int i = 0; i < this.tabControl1.TabPages.Count; i++) { CommonInterface interface2 = this.tabControl1.TabPages[i].Controls[0] as CommonInterface; if (interface2 != null) { interface2.ChangeUnit(this.point_unit_to[this.cboUnit.SelectedIndex]); } } } }