As described in http://www.excelforum.com/forum-rule...rum-rules.html :
9. Acknowledge the responses you receive, good or bad. If your problem is solved, please say so clearly, and mark your thread as Solved: Click Thread Tools above your first post, select "Mark your thread as Solved". Or click the Edit button on your first post in the thread, Click Go Advanced, select [SOLVED] from the Prefix dropdown, then click Save Changes. If more than two days have elapsed, the Dropdown option or Edit button will not appear -- ask a moderator to mark it.

Would be also nice if you add some roeputation by clicking small star-shaped icons in lowerleft corners of the post(s) to those who helped.