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Generating a Proxy DLL and a Type Library from a Single IDL File

You can use a single IDL file to generate both the proxy stubs and header files for marshaling code, and a type library. You do this by defining an interface outside the library block and then referencing that interface from inside the library block, as shown in this example:

//file: AllKnown.idl

[
    object, uuid(. . .), <other interface attributes>
]
interface IKnown : IUnknown 
{
    import "unknwn.idl";
    <declarations, etc. for IKnown interface go here>
};

[
    <library attributes>
]
library KnownLibrary 
{

    //reference interface IKnown:
    interface IKnown;

    //or create a new class:
    [
        <coclass attributes>
    ] 
    coclass KnowMore 
    {
       interface IKnown;
    };
};

For more information, see Marshaling OLE Data Types and Additional Files Required To Generate a Type Library.

 

 

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