Now you have completed your ExternalFileServices reusable part, it's time to test it.
Create a server module called TestFileServicesModule and add the following code to the server module:

• Fields
  Define Field(#Fld_SourcePath) Type(*NVARCHAR) Length(1000)
  Define Field(#Fld_TargetPath) Type(*NVARCHAR) Length(1000)
  Define Field(#Fld_Message) Type(*NVARCHAR) Length(2000)
• Server routine
  Srvroutine Name(TestFileCopy)
     Field_Map For(*INPUT) Field(#Fld_SourcePath) Parameter_Name(SourcePath)
     Field_Map For(*INPUT) Field(#Fld_TargetPath) Parameter_Name(TargetPath)
     Field_Map For(*OUTPUT) Field(#Fld_Message) Parameter_Name(Message)
     * Create an instance of the FileServices reusable part
     Define_Com Class(#ExternalFileServices) Name(#Services)
     * Create an instance of the invocation status object
     Define_Com Class(#ExternalServiceInvocationStatus) Name(#Status)
     * Invoke the Copy method
     #Services.Copy SourcePath(#Fld_SourcePath) TargetPath(#Fld_TargetPath) InvocationStatus(#Status)
     * If not OK status, get the error message
     If (*Not #Status.OK)
        #Fld_Message := #Status.ErrorMessage
     Endif
  Endroutine
  Create a webpage to invoke your server module:
  Evtroutine Handling(#Com_owner.Initialize)
     Define_Com Class(#TestFileServicesModule.TestFileCopy) Name(#FileCopy)
     Define_Com Class(#PRIM_DC.UnicodeString) Name(#Message)
     * Invoke the copy service via the server routine
     * Adjust the source & target file paths
     #FileCopy.Execute SourcePath('/home/tony/a.txt') TargetPath('/home/tony/b.txt') Message(#Message)
     * Check if the server routine returns any error message
     If (#Message.CurChars > 0)
        #SYS_WEB.Alert( #Message )
     Else
        #SYS_WEB.Alert( 'All good!' )
     Endif
  Endroutine
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