How to retrieve the path of the Windows temporary folder
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When you want to create and use a temporary file,it's very convinient to
just create it in the current folder,and erase it when you're done.This
is not however the *right* way to do it,since Windows has a standard 
folder for storing temporary files,it's usually C:\Windows\Temp\ but
you can't hard code this string in your program,it's just an assunption.
The safest way to go about it,is to use the GetTempPath API. You can 
use this little wraper function (GetWindowsTempPath) that I wrote,since
GetTempPath is a somewhat bitchy API.



Option Explicit

Private Declare Function GetTempPath Lib "kernel32" Alias "GetTempPathA" (ByVal nBufferLength As Long, ByVal lpBuffer As String) As Long

Private Sub Form_Load()

   MsgBox "The path of your system's temp folder is: " & vbcrlf & GetWindowsTempPath
   Unload Me

End Sub

Public Function GetWindowsTempPath() As String
   Dim TempPathLen As Long
   GetWindowsTempPath = String(500, " ")
   Call GetTempPath(500, GetWindowsTempPath)
   GetWindowsTempPath = RTrim(GetWindowsTempPath)
End Function






Create a new project and paste the above code in the code module of Form1.
All it does is display a string containing the path of the Windows
temporary folder of your system.