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When experiencing some errors, use the IAUX_Inst::FormatHRESULT method to see their description and include it in your post along with the error code.
What you need to do is indeed possible - but requires a developer with more experience and a greater knowledge of the PDF format than you appear to have and whilst we always strive to help where possible - the level of support you appear to need is beyond what is justifiable and practical to deliver.
I must respectfully suggest you approach your superiors and tell them of your struggles and formulate a plan to either get more help or re-evaluate your intended ambitions as it is not going to be possible for us to provide you with the ongoing support you appear to need to achieve the tasks you are being set.
We cannot provide code samples every time you have a task to achieve effectively lead you to a specific conclusion - you are expected to have to some fundamental skills and knowledge of the PDF format and its construction and in some cases depending on the complexity of the task - these need to be quite considerable - whilst I sympathise that you are struggling with literally 1000's of developers using our toolkits - we cannot realistically hand hold every developer to a conclusion of their tasks throughout the application development every step of the way.
We are here to provide general help and advice to developers who have PDF and demonstrable in depth coding experience and I have to respectfully suggest you are appear to have been set a task that is too demanding for your current levels of experience and we will not be able to help to the extent you appear to need it on an ongoing basis.
If posting files to this forum - you must archive the files to a ZIP, RAR or 7z file or they will not be uploaded - thank you.