Using ACF Attributes in an IDL File
You can use the /app_config MIDL compiler option to specify binding handle attributes in the IDL file rather than in a separate ACF file. Specifically, you can apply the auto_handle, implicit_handle, and explicit_handle attributes to the header of an RPC interface in an IDL file. Consider using this option if your RPC application does not require other ACF attributes, and if you do not require strict OSF-DCE compatibility.