Visual Studio has a tool called Help Workshop under Microsoft Visual Studio 6.0 tools. Note: This will work only for WinHelp and not for Html Help.
Start -> Programs -> Microsoft Visual Studio 6.0 -> Microsoft Visual Studio 6.0 Tools -> Help Workshop
You start the Help workshop. Choose New from file menu and select Help Project. Now you will get a Project File name dialog box. You enter the help file name you want to create in Help File text box. You select File option and you get a Topic files dialog box. You click file and choose add and select the help file you have created. Now say OK. Then click Save and Compile button. This will create a .hlp file. Now select Run Winhelp option from file menu of help workshop. This will display the current help project in the file box. You can click the view help to view the help file.