To use your chm from code have a look to the
Help
namespace, and especially
Help.ShowHelp
.
For example:
System.Windows.Forms.Help.ShowHelp(this, "yourFile.chm");
int id = 150;
System.Windows.Forms.Help.ShowHelp(this,"yourFile.chm",
HelpNavigator.TopicId, id.ToString());
System.Windows.Forms.Help.ShowHelp(this, "yourFile.chm",
HelpNavigator.Topic, "page.htm");
To use topic Ids, you must map the ids to the html pages. If you don't know how to do this, search in Word2Doc documentation. I don't know this software so I can't help further.