If one intends to use the Thumbnail dialog, then one can use BiThumbnailDlg class in the DLL and use InitThumbnail in the OCX. In this way one can browse in directories and if needed, it can show only the first page of a multipage document. If one intends to expand a multipage document, use the Thumbnail browser (use BiThumbnail class in DLL, use InitThumbnailBrowser function in OCX).

One can generate Thumbnails (DIB) from images, and from all pages of a multipage document. Then one can display it in a DC. One can see this in the ThumbnailLow Sample and in the ThumbnailLowExt Sample.

Regards,
Technical Support Team