How to catch the event of "number box lost focus"?

Dear all,

I use a C++ COM as development tool, and the version of API is SolidWorks 2009.

I tried to catch the event when the number box is changed or lost its focus. (Press Enter or leave number box)

I can catch the event from IPropertyManagerPage2Handler6::OnNumberBoxChanged() when the number box is changed.

But I do not know how to catch the event of "number box losts its focus.".

Does anyone have any suggestions to catch the event of "number box lost its focus"?

Thanks a lot

Joe

SolidworksApi macros