Hi Eduardo,
Glad to see your reply again 
Let me explain my requirement clearly.
Actually in case of sales documents when we change some value in Target quantity field for a particular line item and press enter then the pricing procedure will get triggered and net value will be calculated accordingly.
I want the same function to happen for the above fields, That is whenever i change a value in the fields mentioned above and i press "enter" the value of net value must be changed accordingly.
Pricing procedure must get triggered when i press enter on these fields.
Hope am clear with the requirement
Now can you please help on how to acheive this functionality. How to call the pricing procedure on the enter functionality Can you explain with the sample code
Thanks,
Satish