Hi Daniel,
Sorry for not explaining clearly and thanks for your response.
1/ Yes I created a dockpane
2/ A button on my dockpane to do search and zoom to selection on active map.
3/ lslSubjAcct is the name of a listbox that stores single or multiple account numbers to search
4/ SelectByAttributeAsync is a custom method that DoSearch call.
I hard coded my where clause for the query and it works fine. What I'm trying to accomplish is to get all accounts on my listbox lslSubjAcct. The queryString (for the codes above) should be '1234','5678',9101'. Then I'll add FieldNameString, parentheses later. Final queryString should be Fieldname in ('1234', '5678')
In ArcObject everything is in 1 place, much more simple for me to understand.
Thank you so much.