I posted this message on microsoft.public.dotnet.framework.windowsforms
since the original thread related to an error that results when trying to
show a form when I create it on a worker thread. (Error creating window
handle.) The problem only occurs when I manually host the CLR and then use a
worker thread to construct a windows form, but then show the form on the
main application thread. I realize that it's not the done thing to post on
multiple forums, but the main content of this question is much more
appropriate to this forum, and I didn't get any answer on
microsoft.public.dotnet.framework.windowsforms.

So, is there anywhere I can find an example of how to host the CLR?

The way I am doing it now is:

a) Call CorBindToRuntimeEx
CComPtr<ICorRuntimeHost> spRuntimeHost;
CorBindToRuntimeEx(_T("v1.1.4322"), _T("wks"),
   STARTUP_LOADER_OPTIMIZATION_SINGLE_DOMAIN | STARTUP_CONCURRENT_GC,
   CLSID_CorRuntimeHost, IID_ICorRuntimeHost, (LPVOID*)(&spRuntimeHost));

b) Starting the CLR
spRuntimeHost->Start();

c) Getting _AppDomain interface
CComPtr<IUnknown> spUnk;
spRuntimeHost->GetDefaultDomain(&spUnk);
_AppDomainPtr spDefAppDomain;
spUnk->QueryInterface(&spDefAppDomain);

d) Getting IDispatch of the managed object (calling GetIDsOfNames on the
managed object directly seems to fail. Mangled method names?)
CComPtr<_ObjectHandle> spObjectHandle;
spDefAppDomain->CreateInstance( _bstr_t("MyName"),
_bstr_t("MyNamespace.MyClass"), &spObjectHandle);
CComVariant VntUnwrapped;
spObjectHandle->Unwrap(&VntUnwrapped);
if (VntUnwrapped.vt != VT_DISPATCH) return FALSE;
CComPtr<IDispatch> pDisp;
pDisp = VntUnwrapped.pdispVal;

e) Invoking the method on the managed class (entry point to managed code)
OLECHAR FAR* szMember = _T("StartMyManagedApplication");
DISPID dispid;
DISPPARAMS dispparamsNoArgs = {NULL, NULL, 0, 0};
pDisp->GetIDsOfNames (IID_NULL, &szMember, 1, LOCALE_SYSTEM_DEFAULT,
&dispid);
pDisp->Invoke(dispid, IID_NULL, LOCALE_SYSTEM_DEFAULT, DISPATCH_METHOD,
    &dispparamsNoArgs, NULL, NULL, NULL);

I'd be very interested to know if this is the correct way, or if not, where
I can
find out further information on how to do this correctly.

Thanks in advance,
David.