Which online or other sources could help you through your coarse work ?

For on-line resources I recommend you This  forum. This was really helpful during the days I created my project. Just register and start posting your queries!!! 

For other sources I recommend you buy any of the following books to help you.

1. AIKMAN Series

     Visual BASIC 

     CM ASLAM & TA Qureshi

2. Using Visual Basic 6.0

     Brian Siler & Jeff Spotts

OR,

You could use any other book that your teacher recommends or that suits you.