This is a "dialog" which means "do not show dialog at all".
It's usually used when you don't want to interact with user (like: non-interactive services or web-applications). If you set this dialog for your application then it will not show error dialog to the user, instead there will be a standard exception processing: like saving bug report and/or sending report to developer.
This "dialog" will store an empty "steps to reproduce" text, uses default user e-mail and perform report sending (as if the user has clicked on "Send" button) and sends screenshot, if it was created (specified in send options).
Default user information is extracted via GetUserEMail, GetUserFullName and GetUserName functions. You can set default user e-mail by calling SetUserEmail function.
It's not recommended to use this dialog type for sending reports in application which interacts with user. That's because this dialog type sends report silently, without any confirmation from user.