Runtime merging is a HTML Help 1.x feature that allows you to merge the content of multiple compiled help files (.chm files) at runtime. The effect is that a number of different help files are presented to the user a single help file. Runtime merging involves a master project and one or more child projects. The master project contains a reference in the Build Profile to the child .chms and references in the Table of Contents to the Table of Contents in the child .chms.
Setup a Project for Runtime Merge
A complete path is not required only the name of the file without the extension e.g. Child1
If your CHM file was built using a tool other than Document! X or HelpStudio, you may need to also specify the .hhc (Table of Contents) filename within the CHM. To do this, you can use an extended syntax of "Filename.chm::/tocfile.hhc".
Deploying .chm files for runtime merge
In order for the Html Help Viewer to be able to locate any referenced child .chm files, they must either be in the same directory as the master .chm, or be identified in the registry. See the Deployment topic for more information on how to register the location of .chm files.