C# Definition:

[StructLayout(LayoutKind.Sequential, Pack = 4, CharSet = CharSet.Unicode)]
private struct ACTCTX
{
     public int cbSize;
     public uint dwFlags;
     public string lpSource;
     public ushort wProcessorArchitecture;
     public Int16 wLangId;
     public string lpAssemblyDirectory;
     public string lpResourceName;
     public string lpApplicationName;
     public IntPtr hModule;
}

VB Definition:

Private Structure ACTCTX
    Public cbSize As Integer
    Public dwFlags As UInteger
    Public lpSource As String
    Public wProcessorArchitecture As System.UInt16
    Public wLangId As Int16
    Public lpAssemblyDirectory As String
    Public lpResourceName As String
    Public lpApplicationName As String
    Public hModule As IntPtr
End Structure

User-Defined Field Types:

None.

Notes:

None.