# Inserting an OLE 2 Object in an OLE 1 Application

If a particular class is insertable in an OLE 1 container, the “ProgID” root key will contain a Protocol\StdFileEditing subkey with appropriate subkeys Verb, Server, and so on, as in OLE 1. The Server that should be registered here is the full path to the executable file of the OLE 2 object application. An OLE 1 container uses the path and executable file names to launch the OLE 2 object application. The initialization of this application, in turn, loads the OLE 2 compatibility layer. This layer handles subsequent interactions with the OLE 1 container (client), turning them into OLE 2like requests to the OLE 2 application. An OLE 2 object application doesn’t have to take any special action beyond setting up these registry entries to make objects insertable into an OLE 1 container.

The ProgID key and its subkeys appear in the registry as shown in the following example, where “<Progid>“ is the key, and “Insertable,” “Protocol,” “StdFileEditing,” “Verb,” and so on are subkeys.

<ProgId> = <MainUserTypeName>
Insertable // class is insertable in OLE 2 containers
Protocol
StdFileEditing // OLE 1 compatibility info; present if, and only if,
// objects of this class are insertable in OLE 1 containers.
Server = <full path to the OLE 2 object application>
Verb
0 = <verb 0> // Verb entries for the OLE 2 application must start with zero as the
1 = <verb 1> // primary verb and run consecutively.
CLSID = <CLSID> // The corresponding CLSID. Needed by GetClassFile.
Shell // Windows 3.1 File Manager Info
Print
Open
Command = <appname.exe> %1

To summarize, any root key that has either an Insertable or a Protocol\StdFileEditing subkey is the ProgID (or OLE 1 class name) of a class that should appear in the Insert Object dialog box. The value of that root key is the name displayed in the Insert Object dialog box.

The values of each key in the example below are used for registering the “Ole 2 In-Place Server Outline” sample application. Set these values as required and used by your application.