Confuse which to choose for user intercace to control Arduino: VB or Processing?

Hmm, thank you for your respond.

But can processing gives me a sample of visual like this:
http://www.pjrc.com/teensy/firmata_test/firmata_test.exe
and these FirmataVB - Downloads page

I think I can learn from what has been existed then I improve...
Do you have any example of processing to read data from arduino and show it in Graphical User Interface, write to arduino to turn on of which pin ????
Any help and respon are really appreciated!