private void TimerCPV_Tick(object sender, EventArgs e) { if (isCollapseCPV) { BtnCPV.Image = Resources.ArrowDown16; PanelCPV.Height -= 10; if (PanelCPV.Size == PanelCPV.MinimumSize) { TimerCPV.Stop(); isCollapseCPV = false; } } else { BtnCPV.Image = Resources.ArrowUp16; PanelCPV.Height += 10; if (PanelCPV.Size == PanelCPV.MaximumSize) { TimerCPV.Stop(); isCollapseCPV = true; } } }