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Piotr Ryszkiewicz
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Hi, I just started experimenting with ABL.NET GUI programming (and OOP as well), and now stumbling with few quite basic questions. 1. I have class constructor which draws my window. But before it does so, it should run some business controls to check if the window can be really started. If the result of such control is false, how can I prevent the window from starting ? I discovered that RETURN ERROR from constructor does the job, but is it the only and recommended option ? 2. How to simulate RETURN NO-APPLY in leave trigger of textbox to force user to enter correct value ? 3. How to implement business validation on pressing "Save" or "OK" button. Or specifically - how to stop window from write data if the result of validation is false ? 4. Is there something like {&SELF-NAME} which I can use inside the trigger ? Any help would be appreciated 
Piotr
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