C# Signature:

[DllImport("kernel32.dll", SetLastError=true, CharSet=CharSet.Auto)]
static extern uint GetWindowsDirectory([Out] StringBuilder lpBuffer,
   uint uSize);

VB Signature

Declare Function GetWindowsDirectory Lib "kernel32" Alias "GetWindowsDirectoryA" _
   (ByVal Buffer As String, ByVal Size As Integer) As Integer

User-Defined Types:

None.

Notes:

None.

Tips & Tricks:

Please add some!

Here are two ways to get the Windows path

   Private Sub test()
      Dim sSystemPath As String = System.Environment.GetFolderPath(Environment.SpecialFolder.System)
      MessageBox.Show(sSystemPath.Substring(0, sSystemPath.LastIndexOf("\")))
      MessageBox.Show(System.Environment.GetEnvironmentVariable("windir"))
   End Sub

VB Sample Code:

   Dim WinDir As String = Space(255)
   Dim Res As Integer = GetWindowsDirectory(WinDir, WinDir.Length)
   WinDir = WinDir.Substring(0, Res)

C# Sample Code:

   const int MaxPathLength = 255;
   StringBuilder sb = new StringBuilder(MaxPathLength);
   int len = (int)GetWindowsDirectory(sb, MaxPathLength);
   _windowsDirectory = sb.ToString(0, len);

Alternative Managed API:

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