Transfer text box data to subform

[Gazza2]

This is a price check form so it doesnt need to be saved it just needs to display the part no info and quantities with price
If i enter a part no into a text box(PN1) on the main form it enters the data into a textbox(PN2) on a subform.
Im using a continuous form on the subform and the master/child link is the Part No text box.
is there a way to lock the first item to the first line and then be able to enter a second item to display on the next line.
I have made the size of the continuous form to one line in my subform but i am only able to enter one part no into the subform because when i setfocus to the PN1 textbox on the main form it clears the first line.

thanks

 

[Gazza2]

This is either a very stupid idea or very hard idea.

Really all i need to do is type in a number that is in a product table and get it to show the record on a subform but i need to be able to enter and have multiple items show up in the subform.

Product table
part no
discription
cost

Main form
textbox1 = Part no
textbox2 = Quantity

Subform
Unbound textbox = quantity
textbox3 = part no
textbox4 = description