private void toolStripButton_Click(object sender, EventArgs e) { foreach (ToolStripButton b in toolStrip1.Items) { b.Checked = false; } ToolStripButton click = (ToolStripButton)sender; if (click.Checked) { m_act = Act.None; } ShowMessage("act:" + m_act); click.Checked = !click.Checked; //MT.ClearEvent(); if (m_act == Act.DefinePoint || m_act == Act.DefineId || m_act == Act.DefineName || m_act == Act.DefineChoose || m_act == Act.DefineUnChoose || m_act == Act.SeclectionToDark || m_act == Act.SeclectionToWhite) { MT.StartDraw(true); //MT.completevent += CompleteSelection; } }