yes.
do you want both combos using the same data .. or .. the data in one combo to be decided by the selection value in another ?
Have a look at
(dcl_ComboBox_AddString Form_ComboBox
NewString [as String])
and
(dcl_ComboBox_DeleteString Form_ComboBox
nIndex [as Integer])
and
(dcl_ComboBox_AddList Form_ComboBox
StringList [as List of Strings])
and
(dcl_ComboBox_Clear Form_ComboBox)