Help File - Specifies a special Help document (.CHM or .HLP) that you can use to display special information about the symbol that you create. For example, you could use a Help file to explain or provide images on different ways to place a door symbol. You could also explain the significance of parameters and graphic inputs.
When running on the Vista operating system, you must use only a .CHM help file.
Help Context - Defines a Help context identifier for calling a specific topic in a Help file. The Help file must be compiled with the Help context identifier mapped to the Help topic.