Here's what I need to do....

I have a invoice form. It has a datagrid on it....

I have a label that I click which opens a "parts form"..

from the parts form you click the part you want to add to the invoice.. (this form displays the parts in a datagrid aswell)

But If the part already exsists in the invoice form datagrid..I dont want to add it again...but add 1 to the Qty of the exsisting part??

Thanks for the help in advance!!