Questions And Answers for PowerBuilder Interviews

Question

I need to declare an Instance variable for a DataWindow control ONLY, in a window. What should I do?

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Answer

When you declare an instance variable at a window, it is accessible to all controls in the window. First of all, you can't declare an Instance/Shared variable for a specific control in a window. If you have the need of that, you need to create a user object of that specific control and declare instance/shared variables in the user object. Then place the user object in the window. In summary, a window control can't have it's own instance/shared variables, but the user object can (in the user object painter ONLY, not in Window Painter).

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