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Option Explicit
Usage chose one depending on you needs
sTempFile = fnGetTempPath(sPrefix, sDir)
sTempFile = fnGetTempPath(sPrefix)
sTempFile = fnGetTempPath(, sDir)
sTempFile = fnGetTempPath()
sTempFile = fnGetTempPath

Parms (both are optional)
sPrefix: Use if you want the file name to start with your defined characters. Only first 3 chars are used if ommited file is
named @@@@.tmp
sDir: if you want a temp file in a specfic directory, if omitted the system temp directory is used.

Returns: The name of the empty file created.
_______________________________________________________________________________

' get the directory in the temp enviromental variable
' dir name is returned in lpBuffer
Public Declare Function GetTempDir Lib "kernel32" _
Alias "GetTempPathA" _
(ByVal nBufferLength As Long, _
ByVal lpBuffer As String) As Long

' get the name and allocate the file
' path
Public Declare Function GetTempFilename Lib "kernel32" _
Alias "GetTempFileNameA" _
(ByVal lpszPath As String, _
ByVal lpPrefixString As String, _
ByVal wUnique As Long, _
ByVal lpTempFileName As String) As Long

Private Const MAX_PATH As Long = 256
'
' if path is passed it is used else the temp path is used
' returns temp path & temp file name
' Can be optionaly be passed a filename Prefix
' ----------------------------------------------------------------------
Public Function fnGetTempPath( _
Optional sOptPrefix As String = "", _
Optional sOptDir As String = "") As String
' ----------------------------------------------------------------------
Dim sRoutineID As String

Dim lReturnVal As Long
' be sure variables are long enought
' MAX_PATH is used in API call also
Dim sTempDir As String * MAX_PATH
Dim sTempFilename As String * MAX_PATH

On Error GoTo Handle_Error
sRoutineID = "modGetTempFile fnGetTempPath"

' be sure the string ends with a null char
' or error can result

sOptPrefix = Trim$(sOptPrefix) & vbNullChar

' get the path in the temp enviromental variable
' or use the optional path ( check for ending \)
sOptDir = Trim$(sOptDir)
If Len(sOptDir) < 2 Then
lReturnVal = GetTempDir(MAX_PATH, sTempDir)
Else
If Right$(sOptDir, 1) <> "\" Then
sOptDir = sOptDir & "\"
End If
sTempDir = sOptDir & vbNullChar
End If

' now get and create a temp file in that path
lReturnVal = GetTempFilename(sTempDir, sOptPrefix, 0, sTempFilename)
'return the name of the file
fnGetTempPath = sTempFilename

Exit_Point:
Exit Function

Handle_Error:

MsgBox "Unexpected Error Returned" & vbCrLf _
& "At " & sRoutineID & vbCrLf _
& "Nmbr " & Err.Number & vbCrLf _
& "Desc " & Err.Description & vbCrLf _
& "Srce " & Err.Source & vbCrLf _
& "Time " & Now & vbCrLf _
& "Path " & App.Path, _
16, "You have a Problem!"

fnGetTempPath = ""
Resume Exit_Point
End Function
 Get temp-file

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