See http://msdn.microsoft.com/en-us/library/aa595058.aspx
To create a display method, place the display keyword immediately in front of the method’s return type. For example:
display Amount amount()
display methods must have a return type. The return value is typically a calculated value (for example, a sum). For an example, see How to: Create Form Controls.
There should no parameters in a display method unless it is on a form data source where you must include the data source as a parameter.
For example:
display InventQty accumulated(InventBudgetInvent Budget)
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| You must use display on a form data source method when the return value is to be shown on a grid control. |
