private void tabControl_KeyUp(object sender, KeyEventArgs e) { if ((int)Keys.LControlKey == e.KeyValue) { this.CtrlDown = false; } if (this.tabControl.TabCount > 0) { TabPage tabPage = this.tabControl.SelectedTab; PageNode node = tabPage.Tag as PageNode; STPage panel = node.panel as STPage; panel.KeyUps(e); } }