PE format

https://skr1x.github.io/portable-executable-format/

https://0xrick.github.io/win-internals/pe8/

https://kaimi.io/en/2012/09/developing-pe-file-packer-step-by-step-step-9-delay-loaded-dlls-and-image-config/

https://www.ired.team/miscellaneous-reversing-forensics/windows-kernel-internals/pe-file-header-parser-in-c++

https://www.codeguru.com/windows/injective-code-inside-an-import-table/

https://github.com/hfiref0x/WinDepends

VPN only
https://medium.com/@aliraza.abro.prog/pe-file-format-a-primer-1fc6b51f1dfa

Check 64x
https://superuser.com/questions/358434/how-to-check-if-a-binary-is-32-or-64-bit-on-windows