How to handle mouse hover in objects of the array

[nam_h_tran]

I create the object. Now how can i make my mouse event when hover near the base point ( rectangle and triangle base point)  it will automatic picked that blue point. 
I using the acedGetPoint.. should i add something before that to track the base point of the array?

[daniel_cadext]

maybe AcEdInputPointMonitor?

https://help.autodesk.com/view/OARX/2025/ENU/?guid=GUID-BBDA79D3-A509-4C96-966E-72592BD32ACD

https://help.autodesk.com/view/OARX/2023/ENU/?guid=OARX-RefGuide-AcEdInputPointMonitor