Help with Compile error: Can't find Project or Library

Inventory System Version: VB6
Author: Jomar Pabuaya

I have downloaded the above source code, registered the .ocx files but when trying to run the project i get the following error:

Compile error: Can't find Project or Library

with the following sub highlighted

'Procedure used to fill list view
Public Sub FillListView(ByRef sListView As ListView, ByRef sRecordSource As Recordset, ByVal sNumOfFields As Byte, ByVal sNumIco As Byte, ByVal with_num As Boolean, ByVal show_first_rec As Boolean, Optional srcHiddenField As String)

All help will be appreciated as I'm reatively new to VB6

Inventory System Version: VB6
Author: Jomar Pabuaya