The action initiates the handler of particular picture event. Generally, picture event handler is a specialized procedure initiates with the keyword
ENTRY (or
ENTRYX).
Picture events generated by graphic objects can be handled in two ways:
- special handler of a picture event for a graphic object
- global handler of a picture event for all graphic objects
The first way (special handler) handles events generated by one graphic object. Such handler contains a special name consisting of the graphic object name (the reference variable connected to graphic object) and picture event name. This method uniquely identifies the handler name (for example: BtnOK_OnClick. _BtnOK is a Reference local variable connected to the graphic object and OnClick is an picture event type).
The second way (global handler) handles all picture events of given type (for example: OnClick) for all graphic objects, for which a special handler of given picture event.
If a picture event handler is defined by the keyword ENTRYX, requests for handling picture events will be reduced so, that last picture event, not handled yet, will be handled first. During generation of a new picture event, all the picture event of the same type waiting to handle will be ignored.
The keyword ENTRYX may not be used for the following picture events: OnClose, OnPopUpMenu_Result, OnSubPictureClosed, OnAXEvent, OnItemValidate, OnFetchDone, OnUserInput.
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