How to read / write binary file with Unicode filename in VB6 - unicode

Question

I have this code:
Function cpyBIN(cpFilename As String)
Dim litefile() As Byte
Dim FN As Integer
Dim xlof As Long
FN = 1
Open cpFilename For Binary As FN
xlof = LOF(FN)
ReDim litefile(xlof)
Get FN, , litefile
Open cpFilename & "Backup" For
Binary As #2
Put #2, , litefile
Close #2
Close FN
End Function
and I use it in a Form like this :
Private Sub cmdBackup_Click()
Dim strComputer, objWMIService, colFiles, objfile
strComputer = "."
Set objWMIService = GetObject("winmgmts:" _
& "{impersonationLevel=impersonate}!\\" & strComputer & "\root\cimv2")
Set colFiles = objWMIService.ExecQuery("Select * from CIM_Datafile where Drive='D:' and path='\\contoh\\'")
For Each objfile In colFiles
cpyBIN (objfile.Name)
Next
End Sub
in the contoh folder there are 2 sample files:
namafile.exe
namafile♣♣♠.exe
when I run the code there is an error message like in the picture:
the error is in the line as shown in the picture:
how to make it supports unicode filename?
or
is there any replacement for this function??

Answer 1

There are several ways to make a copy of a file with Unicode file names. The first way is by using the Windows API:
Declare Function CopyFileW Lib "kernel32.dll" (ByVal lpExistingFileName As Long, _
ByVal lpNewFileName As Long, Optional ByVal bFailIfExists As Long) As Long
For Each objfile In colFiles
CopyFileW StrPtr(objfile.Name), StrPtr(objfile.Name & ".Backup")
Next
The second way is by using a FileSystemObject:
Dim fso As FileSystemObject
Set fso = New FileSystemObject
For Each objfile In colFiles
fso.CopyFile objfile.Name, objfile.Name & ".Backup", True
Next
The third way is by using an ADO Stream:
Dim s As ADODB.Stream
Set s = New ADODB.Stream
s.Open
s.Type = adTypeBinary
For Each objFile In colFiles
s.LoadFromFile objFile.Name
s.SaveToFile objFile.Name & ".Backup", adSaveCreateOverWrite
Next
s.Close
If you want to read data, I would use an ADO Stream:
Dim s As ADODB.Stream
Set s = New ADODB.Stream
s.Open
s.Type = adTypeBinary
For Each objFile In colFiles
s.LoadFromFile objFile.Name
data = s.Read()
'use the data somehow
Next
s.Close