For that, you are very, very smart. The built-in browser function in VB sends passwords as stings *Plain Text* so if someone was packet sniffing you, or watching the line, they could very, very easily grab your password, or the person writing the application could easily record it to a .txt file. Not saying the OP would, just saying =)
Anyway, congrats on your first VB application, it's a good milestone. VB is rather easy to learn, but it is also rather powerful, and lightweight. VB.NET is something you might want to look for, less flexible, but more powerful.