Windows: known folders

Querying the location of a known folder with PowerShell and SHGetKnownFolderPath

#
#   https://stackoverflow.com/a/25094236
#

add-type @"

    using System;
    using System.Runtime.InteropServices;
  
    public class shell32  {
        [DllImport("shell32.dll")]
        private static extern int SHGetKnownFolderPath(
             [MarshalAs(UnmanagedType.LPStruct)] 
             Guid       rfid,
             uint       dwFlags,
             IntPtr     hToken,
             out IntPtr pszPath
         );

         public static string GetKnownFolderPath(Guid rfid)  {
            IntPtr pszPath;
            if (SHGetKnownFolderPath(rfid, 0, IntPtr.Zero, out pszPath) != 0) {
                return "Could not get folder";
            }
            string path = Marshal.PtrToStringUni(pszPath);
            Marshal.FreeCoTaskMem(pszPath);
            return path;
         }
    }

"@

$downloadFolder = $([shell32]::GetKnownFolderPath('{374DE290-123F-4565-9164-39C4925E467B}'))

See also