Show Progress Bar in Outlook Addins

Question

i m developing a Outlook Add ins using C#. hare i extract all the attachment(in doc or docx) which is attach with selected mail. i have create a button on tool bar using add in.when i click on button then all the attachment with selected mail come in to my database.now my question is that when i click on button that time some processing happens during the processing time i want to show a progress bar on my outlook window untill its finish extraction.Can any one help me to out this problem. here i include code also with extract mails attachment and sent to database