How to pass parameters from Form to Class

Hi, 
To pass the parameters from form to class is straightforward.
1.Create a class yourClass
class yourClass { }
2. override the new method

void new(PurchID purchid)

{

;

info(Itemid);

}

---------- Class Completed

Go to form purchTable

1. Add a button

2. override the click method of the button with following code

void clicked() 
{  
PurchID purchId;
Args args=new Args();
YourClass yourClass;  
;
purchId=args.parm(purchTable.purchid);  
yourClass=new YourClass(purchid); 
}
Save and Compile
now when u will hit the button on purchTable form it will return the current purchid of the data source . I hope it will help
Cheers,