serial communication between visual basic6.0 and arduino


I want to communicate with my arduino uno r3 and pc through visual basic 6.0. I have searched for an example in vain for some time.

I'm trying to make a simple code with which I can receive data from arduino and send some command to arduino through visial basic 6.0. I found one visual basic code, which used commPort 1 while my arduino used com port 20. I tried to change com port of vb from 1to 20, which just created a run time error 8 message. I link the site for your reference. Though this link is said not in English, there would not be much trouble to understand the code. Plz read it and give me your advice.

Or, would you let me know any good example code or internet sites for the topic?

Thanks in advance.