void onHelpSettingsCommand(IUICommand command) { helpPopup = setupSettings(helpPopup); SettingsFlyout.HelpFlyout helppane = new SettingsFlyout.HelpFlyout(); helppane.Width = settingsWidth; helppane.Height = windowBounds.Height; // Place the SettingsFlyout inside our Popup window. helpPopup.Child = helppane; // Let's define the location of our Popup. helpPopup.SetValue(Canvas.LeftProperty, SettingsPane.Edge == SettingsEdgeLocation.Right ? (windowBounds.Width - settingsWidth) : 0); helpPopup.SetValue(Canvas.TopProperty, 0); helpPopup.IsOpen = true; }