Overview of Type Building Interfaces

The type building interfaces include the following member functions:

You create an Automation type library by using the ICreateTypeLib and ICreateTypeInfo interfaces.

In the following example, a type library is created (Hello.tlb) by the MIDL compiler (or MkTypLib.exe), using the following .odl file.

[
uuid(2F6CA420-C641-101A-B826-00DD01103DE1),            // LIBID_Hello
helpstring("Hello 1.0 Type Library"),
lcid(0x0409),
version(1.0)
] 
library Hello
{
#ifdef WIN32
importlib("stdole32.tlb");
#else
importlib("stdole.tlb");
#endif

[
uuid(2F6CA422-C641-101A-B826-00DD01103DE1),        // IID_IHello
helpstring("Hello Interface")
]
interface IHello : IUnknown
{
[propput] void HelloMessage([in] BSTR Message);
[propget] BSTR HelloMessage(void);
void SayHello(void);
}
[
uuid(2F6CA423-C641-101A-B826-00DD01103DE1),        // IID_DHello
helpstring("Hello Dispinterface")
] 
dispinterface DHello
{
interface IHello;
}

[
uuid(2F6CA421-C641-101A-B826-00DD01103DE1),         // CLSID_Hello.
helpstring("Hello Class")
]
coclass Hello
{
dispinterface DHello;
interface IHello;
}
}