Hi All,
I'm trying to implement a COM object in C#. This COM object implements
an interface defined in a tlb. One of the methods in this interface has the
signature:
HRESULT GetAddFormForTab( [in] BSTR strParentType,
[in] BSTR strParentUniqueID,
[in] BSTR strTabName,
[out, retval] IcolFormElements **pFormElements );
'IcolFormElements' is another interface defined in another tlb.
I've used tlbimp to produce assemblies for both tlb's and implemented
an object in C#.
The compiling goes fine but when regasm is called on the produced assembly,
i
get a strange error as shown in the next paragraph:
COM Interop registration failed. Type library exporter encountered an error
while processing 'DotNetPlugin'. -Error: Type library exporter can not load
type DotNetPlugin.DotNetPlugin (error: System.TypeLoadException: Method
GetAddFormForTab in type DotNetPlugin.DotNetPlugin from assembly
GetAddFormForTab does not have an implementation.).
Now, 2 things are strange.
First, the text 'from assembly GetAddFormForTab' ? There is
no 'GetAddFormForTab' assembly. It's a method!?
Second, why is this an error in the first place?
I of course made sure that this method IS implemented.
The IL produced by tlbimpl for this method looks like this:
.method public hidebysig newslot virtual abstract
instance class
[COMPOSITEEMISSARYLib]COMPOSITEEMISSARYLib.colFormElements
marshal( interface)
GetAddFormForTab([in] string marshal( bstr) strParentType,
[in] string marshal( bstr) strParentUniqueID,
[in] string marshal( bstr) strTabName) runtime
managed internalcall
{
.custom instance void
[mscorlib]System.Runtime.InteropServices.DispIdAttribute::.ctor(int32) = (
01 00 03 00 00 00 00 00 )
} // end of method ICPConfigure::GetAddFormForTab
Has anyone faced the same problem? If so, what's the plan here?
cheers
Frederic
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