You can assign Help files to each form and each control. The Help file and topic are displayed when the user presses F1 and the cursor is not on a control.
You can also assign a Help topic to each control. This topic is displayed when the user presses F1 while the cursor is on that control.
The form designer is displayed in the right pane. The topics and feature classes are displayed in the form explorer.
In the Options dialog box, in the Help section, enter the properties, as for example:
File Name: myhelp.chm
Context: form_designer_introduction.htm