How to: Display the Customization Window
This example shows how to invoke the customization window. To do this, call the ASPxClientTreeList.ShowCustomizationWindow method. To hide this window, use the ASPxClientTreeList.HideCustomizationWindow method.
<ClientSideEvents Click="function(s, e) {
if(!treeList.IsCustomizationWindowVisible()) {
treeList.ShowCustomizationWindow();
e.proceessOnServer = false;
}
}"></ClientSideEvents>