Creating trustedfunction for addWatermarkFromFile

[#1]

I'm brand new to Adobe programming and I'm trying to automate the conversion of an Excel worksheet into a PDF.  I need to add a footer and, through Google research, found out how to do it using "addWatermarkFromText".  Now I need to add an image to the header so I guess I'll have to use "addWatermarkFromFile".  I found out though that that function needs a "trustedfunction" wrapper and I don't know how to create one.  Apparently, you create the trustedfunction and save it to a particular folder.

Does anyone know how to do this?  Thanks very much for any help.

[#2]

I'm brand new to Adobe programming and I'm trying to automate the conversion of an Excel worksheet into a PDF.  I need to add a footer and, through Google research, found out how to do it using "addWatermarkFromText".  Now I need to add an image to the header so I guess I'll have to use "addWatermarkFromFile".  I found out though that that function needs a "trustedfunction" wrapper and I don't know how to create one.  Apparently, you create the trustedfunction and save it to a particular folder.

Does anyone know how to do this?  Thanks very much for any help.

[#3]

Look at the Acrobat Javascript reference:

https://www.google.com/url?q=https://www.adobe.com/content/dam/acom/en/devnet/acrobat/pdfs/AcrobatDC... 

[#4]

Yes, I have a document called "Acrobat JavaScript Scripting Reference" that seems to be similar, if not identical, to the "JavaScript for Acrobat API Reference".

I'm afraid I still don't know how to compose the TrustedFunction wrapper.

[#5]

There are samples in the reference.

[#6]

Read these tutorials:

https://acrobatusers.com/tutorials/trust-and-privilege-in-acrobat-scripts
https://acrobatusers.com/tutorials/using_trusted_functions

[#7]

Yes, I've tried follow them.  I guess I'll have to keep trying.