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ShellBrowser Delphi Components Documentation
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JamFilePreview.TJamFilePreviewLoadPreviewEventArgs.PreviewHandlerGuid
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ShellBrowser Delphi Components Documentation
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Use property PreviewHandlerGuid to specify or turn off the PreviewHandler used for this file.
property PreviewHandlerGuid: TGuid;
Set PreviewHandlerGuid to Guid.Empty if the file should not be previewed. Set PreviewHandler to a valid IPreviewHandler GUID to use the PreviewHandler for this file.
See TJamFilePreview.PrintPreviewHandler for a list of GUIDs registered on your system.
To avoid any preview to be shown, it might be necessary to also set LoadThumbnail to False.