No AfterLoading event in BO Extension

Hi all.

I need to enhance a standard BO and need to add a field-A. The newly added field has to dynamically enabled/disabled.

My Approach is to add a new field called "EnableIndicator" to the BO and populate this field based on some logic in AfterLoading event. In the

Extensibility Explorer i will adjust the properties of field-A to bound to the EnableIndicator.

But the AfterLoading() event is not available when i extended the standard BO. Is there any way to meet this requirement.

Thanks,

Naga