Hi there :)
Just to make sure everyone's on the same page, have you seen this set of posts from Raymond Chen's blog?
Displaying the dictionary, part 1: Naive version | The Old New Thing
Displaying the dictionary, part 2: Using text callbacks | The Old New Thing
Displaying the dictionary, part 3: Using an owner-data listview | The Old New Thing
The final part covers LVS_OWNERDATA.
(also, for the benefit of future readers, links to the standard documentation)
About List-View Controls (Windows)
List-View Window Styles (Windows)
Without knowing anything about your application it's going to be really, really hard to make any form of sensible comment. I really don't know what to say beyond what has already been said in those MSDN links.
The best thing for you to do would be to carefully write the code using LVS_OWNERDATA in exactly the way you think it should be, in as minimalistic and reproducible style as possible, and then show us what you've tried, what isn't working, and what you're aiming to achieve.
Richard
