WinPreviewControlMBS.classID as String

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	Windows	MBS Win Plugin	23.3	❌ No	✅ Yes	❌ No	❌ No	Desktop only

The class ID for the previewer to use.

If empty, uses PDF viewer.
Available preview classes in a typical Windows 10 installation:

Class ID	Description
{13D3C4B8-B179-4ebb-BF62-F704173E7448}	Windows Contact Preview Handler
{1531d583-8375-4d3f-b5fb-d23bbd169f22}	Windows TXT Previewer
{53BEDF0B-4E5B-4183-8DC9-B844344FA104}	Microsoft Windows MAPI Preview Handler
{8a7cae0e-5951-49cb-bf20-ab3fa1e44b01}	Windows Font previewer
{92dbad9f-5025-49b0-9078-2d78f935e341}	Microsoft Windows Mail Mime Preview Handler
{a42c2ccb-67d3-46fa-abe6-7d2f3488c7a3}	Windows RTF Previewer
{b9815375-5d7f-4ce2-9245-c9d4da436930}	Microsoft Windows Mail Mime Preview Handler
{BFD468D2-D0A0-4bdc-878C-E69C2F5B435D}	Microsoft Windows Mail Html Preview Handler
{E64164EB-1AE0-4C50-BAEF-A413C2B3A4BC}	Microsoft 3MF Shell Thumbnail and Preview Handler
{f8b8412b-dea3-4130-b36c-5e8be73106ac}	Microsoft Windows Mail Html Preview Handler
{3A84F9C2-6164-485C-A7D9-4B27F8AC009E}	Microsoft PDF Previewer
{DC6EFB56-9CFA-464D-8880-44885D7DC193}	Adobe PDF Preview Handler for Vista

Must be set early, like in the IDE using property inspector or Configure event.
(Read and Write property)

WinPreviewControlMBS.Lasterror as Integer

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	Windows	MBS Win Plugin	23.3	❌ No	✅ Yes	❌ No	❌ No	Desktop only

The last error code.

(Read and Write property)

WinPreviewControlMBS.LasterrorString as String

Type	Topic	Plugin	Version	macOS	Windows	Linux	iOS	Targets
property	Windows	MBS Win Plugin	23.3	❌ No	✅ Yes	❌ No	❌ No	Desktop only

The error message for the error number in the lasterror property.

(Read only property)