Use the AddMarkerToProfile action when you want to create a marker and attach it to the active user profile. When you use this action, you must specify a key, which will be the value saved to the marker’s key property. You can also provide values for the value and data properties or keep them empty (NULL).

In addition, you need to indicate whether the marker you’re adding must be unique or if duplicate markers are permitted. If your application accepts unique markers only, you need to determine how new duplicate markers are handled: if a marker exists, should it be replaced by an identical new one or should the new one be discarded? The options available to you are allow duplicates, replace duplicates, and don’t add if there are duplicates.