Registers extension as a provider of dialog_name dialog.
The names are compared case sensitively and two extensions cannot provide the same dialog. If the function succeeds, then it adds its
own reference on the extension.
Extensions providing multiple dialogs call this function multiple times, for each dialog name separately.
| this | |
| extension |
an UserPrompterServerExtension descendant |
| dialog_name |
name of a dialog, which the |
|
Whether properly registered |