private void listView4_MouseDoubleClick(object sender, MouseEventArgs e) { if (viewForm == null || viewForm.IsDisposed) { viewForm = new ViewOverWork(); viewForm.wkot = (ClassLibrary.WorkOverTime)listView4.SelectedItems[0].Tag; viewForm.Show(); } else { viewForm.wkot = (ClassLibrary.WorkOverTime)listView4.SelectedItems[0].Tag; viewForm.init(); viewForm.Focus(); } }