Notes Menu Addin tools

List Fields is a so-called Notes Menu Addin tool. This type of application has some general characteristics:

• The application is visible in Lotus Notes's Actions menu. An example is shown below
  
• It can be activated when certain conditions are met, such as; "Only be enabled when document is in edit mode, and that you have placed the cursor in a richtext field", or "Only be enabled when user is in a view". If the conditions aren't met, the menu item is disabled - or grayed out.
• The application itself must be a DLL with specific functions. Please see the Notes C API documentation for specific details.
• The DLL must be specified in NOTES.INI. Add the DLL filename to the AddInMenus keyword. If you don't place the DLL directly in the Notes Program Directory, you should specify the full path and filename.
  
  Note: The Notes.ini must be available in the first 128 bytes of the system environment variable PATH.

The menu addin applications has several limitations, where the lack of document identification mechanism is one of the most severe. To overcome such limitations, Notes menu addin applications uses various techniques.