File list (Check if you may need any files):
delphi_opc\demo\DataAccess20Demo.cfg
..........\....\DataAccess20Demo.dof
..........\....\DataAccess20Demo.dpr
..........\....\DataAccess20Demo.res
..........\....\DataAccess20Demo.tlb
..........\....\DataAccess20Demo.~dpr
..........\....\DataAccess20Demo.~tlb
..........\....\Main.dfm
..........\....\Main.pas
..........\....\sOPC_TLB.pas
..........\....\sOPC_TLB.~pas
..........\....\uOPCDemo.pas
..........\src\ComCat.pas
..........\...\uGlobals.pas
..........\...\uGroupForm.dfm
..........\...\uGroupForm.pas
..........\...\uLogging.pas
..........\...\uMessageDlg.pas
..........\...\uOPC.pas
..........\...\uOPC.~pas
..........\...\uOPCAsyncIO2.pas
..........\...\uOPCBrowse.pas
..........\...\uOPCDataAccess.pas
..........\...\uOPCGroup.pas
..........\...\uOPCItem.pas
..........\...\uOPCItemEnumerator.pas
..........\...\uOPCNode.pas
..........\...\uOPCStringEnumerator.pas
..........\...\uRegister.pas
..........\...\uTimer.pas
..........\demo
..........\src
delphi_opc