I have an MDI-Application with Automation support created
with VC++ 6 application wizard and statically linked MFC
libraries. So it has a COM Interface mapped to the
I want to call some methods of this interface from C#-
written aspx. ASPCompat flag for the page is set to true.
I've given to ASPNET all possible rights to the COM server
in dcomcnfg.exe, and created a wrapper dll from the
typelib using tblimp.exe.
Now I start the application and then call the page via IE
on localhost. In Page_Load I call
The call it brings the _COMPlusExceptionCode 0xe0434f4d.
Trying to make a new object brings the same.
"MYProcess.Document" ProgID is valid, I see it in the
Why the call fails ?
Alternatively, I tried to do following
Type type = typeof(DocumentClass);
Type dcomtype = Type.GetTypeFromCLSID( type.GUID, false );
object dcomobj = Activator.CreateInstance( dcomtype );
doc = (DocumentClass)Marshal.CreateWrapperOfType( dcomobj,
In this way I get an exception
System.InvalidCastException: QueryInterface for interface
when I call the method.
Could somebody please comment ?
Thanks in advance.