posted Feb 11, 2010, 4:03 AM by Robert Chandler
updated May 29, 2012, 4:22 PM by Robert Chandler
This registry setting allows you to override the default viewer application used by MS Help Viewer (AKA Help 3) and VS 2010 IDE.
Example 1: Set H3Viewer as the default viewer
Example 2: Set Google Chrome as the default viewer
Example 3: To return to the VS default viewer simply delete the registry value.
Normally when you (or VS 2010) ShellExecutes a ms-xhelp:/// help URL, HelpLibAgent.exe runs and launches the help in the defined browser.
Set this registry item to specify a different browser or viewer application to run.
In example 1 we specify that H3Viewer.exe is the default viewer.
In example 2 we specify that Google Chrome is the default viewer (the path is for Chrome 4.x on a Windows 7 PC).
Note: Restart HelpLibAgent.exe once you change this setting.
- To stop Agent right-click the Help Library Agent icon in the taskbar notification tray and select Exit.
- To start Agent run "c:\program files\Microsoft Help Viewer\v1.0\HelpLibAgent.exe" <no parameters>
Note #1: In the RC release there is a bug where Agent wont startup if Help Library Manager is set to "Online" mode. Try setting to "Local (Offline)" mode.
Note #2: You don't have to restart Agent for dedicated Help applications such as H3Viewer. They will start Agent when they need to.