How to create an exe ico res file (M$Win)

res&ico.md

Create .ico

Make .rc file

...with the content like this:
A ICON MOVEABLE PURE LOADONCALL DISCARDABLE "./hc05.ico"

Compile it

windres -i ./res.rc --input-format=rc -o icon.res -O coff

Link the .res file with your program

g++ -o ./Blutool05.exe -std=c++11 ./src/main.cc ./resources/icon.res $(pkg-config gtkmm-3.0 --cflags --libs | sed 's/ -I/ -isystem /g') -mwindows