Hello All, Today, as once in a while, I would like to contribute some lines for those to need 'em. The following code uses functions created by "MSLx Fanboy" (_FindGUID) and "PsaltyDS" (_2DArrayAdd): Thank you, guys! Due to the fact, that the WMI class "Win32_Volume" does not exist on Windows XP and Windows 2000, I instead use the CLI-tool "mountvol.exe" (comes with Windows) to do un- and remounts. The new drive letters are hardcoded, but it is simple to read them from an .ini-file or an i