[gears-users] Re: How to integrate gears into dotnet webbrowser

[Michael Nordman]

This page looks like it discusses the relevant .NET / COM Interop stuff.
http://msdn.microsoft.com/en-us/library/aa645736(VS.71).aspx


Looks like something like the following is needed...


using System.Runtime.InteropServices;

// Declare GearsBHO as a COM coclass
[ComImport, Guid("...")]
class GearsBHO
{
}

// Declare IObjectWithSite as a COM interface which
// derives from the IDispatch interface.
[Guid("..."), InterfaceType(ComInterfaceType.InterfaceIsDual)]
interface IObjectWithSite // cannot list any base interfaces here
{
    // Note that the members of IUnknown and Interface are NOT
    // listed here

    void SetSite([In, MarshalAs(UnmanagedType.Interface)]  object unk );
}


void initGears(object browserControl) {
  // Create an instance of a COM coclass:
  GearsBHO gearsBHO= new GearsBHO ();

  // See if it supports the IObjectWithSite COM interface.
  // Note that this will throw a System.InvalidCastException if
  // the cast fails. This is equivalent to QueryInterface for
  // COM objects:
  IObjectWithSite iobjectWithSite = (IObjectWithSite ) gearsBHO;

  // Call it
  objectWithSite.SetSite(browserControl);
}