Forms :: Copy Data From Record In SubformA To SubformB?

I would like my users to be able to view stock items in one (sub)form and when they double click on an item, then certain data is copied to an orders (sub)form.

I have therefore embedded two unbound subforms into a master form.

The master form (Frm Stock) has no fields, but it has 2 subforms.

Frm_Stock_Subform and Frm_OrderDetail_Subform

So I have 2 problems here.

Problem 1:I would like the following code trigger when the user double clicks anywhere on the record that the user wants to order.Thus far, I can only make it fire only when the user doubl;es clicks in a specific field (in this case, the ID field is the trigger)

Problem 2:I cannot activate the Frm_OrderDetail_Subform in order to create the new record. (I have looked at this link - Refer to form and subform

Code:
Private Sub ID_DblClick(Cancel As Integer)
On Error GoTo Err_ID_DblClick
Dim MyOrderID As Variant
Dim MyStockID As Variant
Dim MyAmt As Variant

[code]....