return GetTempFileName(prefix, unique, Path.GetTempPath());

    return GetTempFolderName(prefix, unique, Path.GetTempPath());

static extern uint GetTempPath(uint nBufferLength,

Declare Function GetTempPath Lib "kernel32.dll" (nBufferLength As Integer, _

Note that there are two entrypoints to GetTempPath in kernel32.dll called "GetTempPathA" and "GetTempPathW". So if you want to use GetTempPath you have to set the EntryPoint on the DllImport-Attribute as follows (C#):

[DllImport("kernel32.dll", EntryPoint = "GetTempPathA")]

         lngRet = GetTempPath(MAX_PATH - 14, tempPath)

    TempFile.GetShortPathName(Path.GetTempPath, shortPath, TempFile.MAX_PATH)

    expected = shortPath.ToString + Left(fPrefix, 3) ' GetTempPath end with "\"

[System.IO.Path.GetTempPath]