Spring V10, Extensibility, Customtab in the "Article Sheet", how to detect and delegate function when the Customtab itself is chosen?

Question

Spring V10, Extensibility, CustomTab, have a CustomTab created in the "Article Sheet", how to detect when the CustomTab is selected and assigns a function?

When I search the examples, I only find for myself CustomTab:

this.Loading += new Primavera.Extensibility.Patterns.CustomTab.EventDelegate(this.PricesMargins_Loading);
this.Saving += new Primavera.Extensibility.Patterns.CustomTab.EventDelegate(this.PricesMargins_Saving);

Answer 1

I used the function this.VisibleChanged += new System.EventHandler(this.checkTab); to detect when Customtab is visible or not.