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4.1.1.2.6 Handling Origin Object Events

Event macros for origin object events include:

Macro	Description
ON_LAYER_DESTROY(_ocHandler)	When destroy one layer the function _ocHandleris run. _ocHandler has the prototype: BOOL ''_ocHandler''( Layer lay, DWORD dwCntrl );
ON_GROBJ_DESTROY(_ocHandler)	When destroy one graph object the function _ocHandleris run. _ocHandler has the prototype: BOOL _ocHandler( GraphObject go, DWORD dwCntrl );