C# Definition:

[StructLayout(LayoutKind.Sequential)]
struct MENUITEMINFO {
   public uint cbSize;
   public uint fMask;
   public uint fType;
   public uint fState;
   public uint wID;
   public HandleRef hSubMenu;
   public HandleRef hbmpChecked;
   public HandleRef hbmpUnchecked;
   public string dwTypeData;
   public IntPtr dwItemData;
   public uint cch;
   public HandleRef hbmpItem;
}

VB Definition:

   <StructLayout(LayoutKind.Sequential)>
   Public Structure MENUITEMINFO
      Public cbSize As Integer
      Public fMask As Integer
      Public fType As Integer
      Public fState As Integer
      Public wID As Integer
      Public hSubMenu As IntPtr
      Public hbmpChecked As IntPtr
      Public hbmpUnchecked As IntPtr
      Public dwItemData As IntPtr
      Public dwTypeData As String
      Public cch As Integer
      Public hbmpItem As IntPtr
   End Structure

User-Defined Field Types:

None.

Notes:

Untested.