How do I say thx to a yahoo question solved?

You wait a minimum of 1 hour, maximum of 4 days. During that time, buttons should appear by each answer to select one as Best Answer. Click the one by the answer you think was best - and say thanks in the comment box. (You're welcome, BTW).

Choose their answer as best answer. You must wait at least an hour and have at least one answer then. Return to your question , click the blue best answer button below the answer you choose then follow the prompts to rate and comment.It's always a good idea to do that because asking the question cost you 5 points and you will get 3 points back for choosing the best answer which makes the question resolved. After four days, seven if you extended the time, if you haven't chosen best answer it goes to voting and the community chooses. Should you wish you could put your question to "in voting" early, click the edit pencil below your question follow the prompts. The voting period is two days after that the answer having the most number of votes wins and the question is considered resolved.

http://help.yahoo.com/kb/index?page=content&id=SLN...

vote their answer as best and then you can write a message