internal static object CreateInstance(LibraryModule libraryModule, Guid clsid)
{
var classFactory = GetClassFactory(libraryModule, clsid);
var iid = new Guid("00000000-0000-0000-C000-000000000046"); // IUnknown
object obj;
classFactory.CreateInstance(null, ref iid, out obj);
return(obj);
}
public static LibraryModule LoadModule(string filePath)
{
var libraryModule = new LibraryModule(Win32.LoadLibrary(filePath), filePath);
if (libraryModule._handle == IntPtr.Zero)
{
int error = Marshal.GetLastWin32Error();
throw new Win32Exception(error, "Cannot load library: " + filePath);
}
return(libraryModule);
}
internal static IClassFactory GetClassFactory(LibraryModule libraryModule, Guid clsid)
{
IntPtr ptr = libraryModule.GetProcAddress("DllGetClassObject");
var callback = (DllGetClassObject)Marshal.GetDelegateForFunctionPointer(ptr, typeof(DllGetClassObject));
var classFactoryIid = new Guid("00000001-0000-0000-c000-000000000046");
IClassFactory classFactory;
var hresult = callback(ref clsid, ref classFactoryIid, out classFactory);
if (hresult != 0)
{
throw new Win32Exception(hresult, "Cannot create class factory");
}
return(classFactory);
}