monitor the selection changes in revit?

[27925916]

is there any way to monitor the selection changes in revit?

for example , I select some walls now,  the monitor reacts and get  the array of these wall's ID, and  I select others walls next, it reacts again......  just like the function of reactor ,AcEditorReactor::pickfirstModified  ,in CAD API.

is there any way to realize it by revit API?

[Moustafa_K]

have a look on this link... it should contains your answer

https://thebuildingcoder.typepad.com/blog/2015/03/element-selection-changed-event.html