Starts the event
            
Namespace: CMS.NewslettersAssembly: CMS.Newsletters (in CMS.Newsletters.dll) Version: 8.0.0.0 (8.1.5347.20411)
Parameters
- issue
 - Type: CMS.Newsletters IssueInfo
Issue for which the e-mail preview is being generated 
- subscriber
 - Type: CMS.Newsletters SubscriberInfo
Subscriber for which the e-mail preview is being generated 
- previewHtml (Optional)
 - Type: 
System String
Final HTML, that will get shown in preview. This parameter is readable from PreviewHtml property when the event is finished. 
Return Value
Type: GeneratePreviewHandlerExceptions
| Exception | Condition | 
|---|---|
| issue is null | 
See Also