ListBox items and intercepting messages

Hello, :)..

2 Questions.

1) How do I add items to a listbox I created with CreateWindowEx
2) How can I intercept messages going to a certain application, or at least determine what messages can be sent so that I may send them from my application.

Kindest regards,
Michael.

1. Use SendMessage() to send LB_ADDSTRING messages.
2. Use Spy++ or similar, (comes with VC).

Excellent! :)
I don't have VC++ but I found Winspector which has heaps more stuff than spy++..

I never knew what spy++ was, we have visual studio at school and I've seen it but never used it.

Thanks again! :)