Exactly same error for me. I’m glad there are such indicators so I don’t have to waste my time on such a crappy overcomplicated design.

Is this the full rust rewrite everyone is talking about?

An important sidenote is “Skype for Business” has nothing to do with Skype MSFT acquired. It’s just brand reuse to cover up their shitty product. What that product is? Good old MSN Messenger’s on-prem sister i.e. ms lync. In fact Skype for business main .exe is still lync.exe . This was acceptable in early 2000s. Now those outdated ui elements, confused windows and scrambled chat history, ignoring the offline messages after the first one. It’s wonky as hell to use in this day and age. At least there are some decent clients for open source platforms like matrix, mattermost, zulip etc. MS teams, MS Skype, MS anything is crap as always.

I don’t know how feasible for you to use an immediate mode GUI library but imgui came to my mind as soon as i read the post. However it’s written in C++ instead of C.

I never tried the C bindings but it seems to have a couple of options including cimgui to use imgui in a C project.

Maybe it’s worth a shot if you want something that’s proven to be lightweight and battle tested (I mean the main imgui project for this).

I don’t know if you missed my other reply but it’s indeed in the exe but they are compressed. Uncompressed exe had the resources you need to change in the exe file.

I think I found the half of the answer.

Out of curiosity I downloaded and installed the trial version from their website. When I inspected it, turns out it’s written in Delphi. What I’m guessing due to monolithic nature of the software (i.e. huge .exe file holding almost everything for the system) the already big (32.9 megabytes) .exe file is actually compressed. When uncompressed it’s approximately 100 megabytes. When I checked the extracted binary(extraction due to execution, hence looking at the memory dump of a once ran executable) the resources now show the logo and the name your censored in a png resource file.

There are several versions of it but I’m guessing one of them is used in that header, others may be used in about window etc.

Unfortunately my quickly hacked up dump file doesn’t run. So even if a modification is done, the resulting exe is not useful as it is.

Detect-it-easy can’t find the exact compressor for the exe sections. So I don’t know if there’s any available de-compressor for this .exe.

At least my findings show why you can’t see those resources in resource hacker. Because it’s compressed and unreadable as it is from the .exe.

It’ll probably be possible to modify those resources once someone can create a runnable extracted version of the original .exe. I hope this helps. I’ll post again if I have any other findings and/or solution.

Image file being explicitly converted into a specific resolution and bitmap makes me wonder if it’s the logo for printed materials like receipts i.e. necessary format for black and white thermal printer.

Yes you can but be careful to not turn into a murderer on the way.