Combo Box selection / AUTO POPULATE combo box in a different form

If I have a combo box [VENDORNAME] on one form [frmPO_ISSUE]

and

another combo box [PART_NO] on a different form (actually, it's a subform of
frmPO_ISSUE) [frmORDER_DETAILS]

Can I populate the second combo box based on a selection made in the first
combo box?


When the form [frmPO_ISSUE] is opened, and the user makes a selection in the
combo box [VENDORNAME] to select which vendor we are cutting a purchase order
to, I would like my form to look in a table [tblBUY] which is all the parts
that we currently have an open request for, and select all parts (one or
more) [PART_NO] that match on the field [VENDORNAME] with the selection made
in the combo box [VENDORNAME].

frmPO_ISSUE
cboVENDORNAME


tblBUY
VENDORNAME
PART_NO
MANUF
MANUF_PN
QTY_ORDER
PROJECT


I want the resulting combo box [PART_NO] in my subform [frmORDER_DETAILS] to
look like this

PART_NO = Column(0)
MANUF = Column(1)
MANUF_PN = Column(2)
QTY_ORDER = Column(3)
PROJECT = Column(4)



Thank you very much for any help you can give me with this!!!