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Extending the Control Bar of a Primary Snap-in

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This section discusses the specific Steps necessary for an extension snap-in to extend the control bar of an extendable node type owned by a primary snap-in. For more information about working with extension snap-ins, see Working with Extension Snap-ins.

A primary snap-in registers the extendable node types that it adds to its namespace. An extension snap-in can extend the control bar of a primary snap-in node type by adding the appropriate registration code and then implementing the IExtendControlBar interface. The snap-in can then associate either a toolbar or menu button with the control bar and add items accordingly.

In the following procedure, be aware that {CLSID}, {snapinCLSID}, and {nodetypeGUID} all denote string representations of the specified CLSIDs and GUIDs. The strings must begin with an open brace ({) and end with a close brace (}).

To extend the control bar of a primary snap-in

  1. The CLSID of each snap-in (extension or stand-alone) must be registered under the HKEY_CLASSES_ROOT\CLSID key in the {CLSID} subkey as an in-process server DLL. The snap-in must also register a threading model for the snap-in CLSID. An apartment threading model is recommended.

    For more information about the HKEY_CLASSES_ROOT\CLSID key, see the CLSID Key. For more information and a code example, see Registering and Unregistering a Snap-in.

  2. All snap-ins must be registered under the HKEY_LOCAL_MACHINE\Software\Microsoft\MMC\SnapIns key in the {snapinCLSID} key. For more information about the SnapIns key, see Registering and Unregistering a Snap-in.

  3. Register the CLSID of the extension snap-in under the HKEY_LOCAL_MACHINE\Software\Microsoft\MMC\NodeTypes\{nodetypeGUID}\Extensions\ToolBar subkey, where nodetypeGUID is the node type GUID of the node type whose control bar is extended. For more information about the NodeTypes key, see Registration Requirements for Extension Snap-ins.

  4. Implement the IExtendControlBar interface as you would for adding a toolbar or menu button to the control bar of a primary snap-in. For more information and specific instructions, see Working with Toolbars: Implementation Details or Working with Menu Buttons: Implementation Details.

Working with Toolbars and Menu Buttons

Working with Extension Snap-ins