C# Definition:

[StructLayout(LayoutKind.Sequential)]
public struct COMPONENTSOPT
[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Unicode, Pack = 8)]
public struct COMPONENT
{
     public static readonly int SizeOf = Marshal.SizeOf(typeof(COMPONENTSOPT));
     private const int INTERNET_MAX_URL_LENGTH = 2084; // = INTERNET_MAX_SCHEME_LENGTH (32) + "://\0".Length +   INTERNET_MAX_PATH_LENGTH (2048)
     public static readonly int SizeOf = Marshal.SizeOf(typeof(COMPONENT));

     public int dwSize;
     public int dwID;
     public CompType iComponentType;
     [MarshalAs(UnmanagedType.Bool)]
     public bool fEnableComponents;
     public bool fChecked;
     [MarshalAs(UnmanagedType.Bool)]
     public bool fActiveDesktop;
}

VB Definition:

<StructLayout(LayoutKind.Sequential)> _
Public Structure COMPONENTSOPT
    Public Shared ReadOnly SizeOf As Integer
    Public dwSize As Integer
    <MarshalAs(UnmanagedType.Bool)> _
    Public fEnableComponents As Boolean
    <MarshalAs(UnmanagedType.Bool)> _
    Public fActiveDesktop As Boolean
    Shared Sub New()
    COMPONENTSOPT.SizeOf = Marshal.SizeOf(GetType(COMPONENTSOPT))
    End Sub
End Structure
     public bool fDirty;
     [MarshalAs(UnmanagedType.Bool)]
     public bool fNoScroll;
     public COMPPOS cpPos;
     [MarshalAs(UnmanagedType.ByValTStr, SizeConst=260)]
     public string wszFriendlyName;
     [MarshalAs(UnmanagedType.ByValTStr, SizeConst=INTERNET_MAX_URL_LENGTH)]
     public string wszSource;
     [MarshalAs(UnmanagedType.ByValTStr, SizeConst=INTERNET_MAX_URL_LENGTH)]
     public string wszSubscribedURL;

User-Defined Field Types:

None.

     public int dwCurItemState;
     public COMPSTATEINFO csiOriginal;
     public COMPSTATEINFO csiRestored;
}

Notes:

VB Definition:

Structure COMPONENT
   Public TODO
End Structure

User-Defined Field Types:

None.

Notes:

static readonly Guid CLSID_ActiveDesktop = new Guid("{75048700-EF1F-11D0-9888-006097DEACF9}");

public static IActiveDesktop GetActiveDesktop()
{
     Type typeActiveDesktop = Type.GetTypeFromCLSID(CLSID_ActiveDesktop);
     return (IActiveDesktop) Activator.CreateInstance(typeActiveDesktop);
}

IActiveDesktop dt = GetActiveDesktop();
int iCount;
dt.GetDesktopItemCount( out iCount, 0 );
COMPONENT comp = new COMPONENT();
for ( int i = 0; i < iCount; i++ )
{
    comp.dwSize = COMPONENT.SizeOf;
    dt.GetDesktopItem( i, ref comp, 0 );
    //...
}

.

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