Internet Explorer Extension Development
Hi,
Find the CLSID of the Reference Explorer Bar in your registry under HKCR\CLSID (I don't have it installed so I don't know its CLSID value) from there find the name of the COM server .dll. You can load that file in your Object Browser of your IDE and view its public methods that you will be able to call programatically.(It may not have any public methods that you can call).
Also look under HKCU or HKLM \Software\Microsoft\Internet Explorer\Explorer Bars\{CLSID of Research bar} . Usually explorer bars store their settings under this key.
If you just want to toggle the Explorer bar use the showbrowserbar method.
Regards.