How to fill comboboxes on a custom control the return the selected values

I have a headercontrol.dll I created with 3 comboboxes. I put the control on my new project form1, how do i fill the comboboxes in my headercontrol.dll based on some query on form1 load.
cboBuyer
cboVendor
cboreason.
LeeHopkinsAsked:
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kerryw60Commented:
If you store your query in a DataTable you can:

With myCombo
            .DataSource = dtMyDataTable
            .DisplayMember = "FieldName"
            .ValueMember = "UniquID"    '(Optional, but usefull)
End With
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LeeHopkinsAuthor Commented:
??
I am confused i have my form1.
i put the control  headercontrol on the form
headercontrol contains there comboboxs,
cbobuyer,
cbovendor,
cboreason
on form1 I also have a list box based on this listbox selection i need to fill the three cbo's on  headercontrol. I can seem to see cbobuyer or cbovendor or cboreason? from from 1
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anyoneisSoftware DeveloperCommented:
Have you exposed cbobuyer, cbovendor, and cboreason by marking them public? If so, you should be able to reference this.HeaderControl1.cboBuyer....
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