Query Regarding the download Specific Attachment mail and Currency multiplier

Question

I want to download specific attachment mails from my mail server into the application bin folder using the MAPI control at runtime. Even though i tried using the mapi controls fetch method but it makes all my unread messages to read. Will you please help me in solving this problem. Your help will be highly appreciated. Another help i want from you people is regarding the currency multiplier. i want to make my application currency multiplier compatible will you people provide me some help regarding these two querries.