SMTP + file-attachment + VB.net

Hi guys,
i need help. i want to write a program in vb.net which makes an automatic email with an file attachment and puts this email into the the smtp folder pick-up.
how can i do this with the base64 encoding andso on...are there any tutorials or more information out in the web.. if yes, just paste me the URL and thats already enough..
how to make the email and so on is also a little problem, but as soon as i got the base64 encoding part i can do the rest.. so please help me..

thanks..
bye bye..

i got the solution for this problem.. can be closed..