Can anyone help me, how do you detect if there are changes made on the thumbnail viewer (eg. re-ordered pages, placed a stamp, placed annotations) and prompts you to save changes upon closing the form?
Thank you very much.
There is no point detecting any other action such as placing a stamp or another annotation since it does not happen on the thumbnail but on the document attached and there are all the required events to catch those in GdViewer.
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