From QB64 Wiki
$EXEICON pre-compiler metacommand embeds a designated icon file into the compiled EXE file to be viewed in Windows Explorer.
- 'iconfile.ico' is a valid ICO file
- Calling _ICON without an imageHandle& uses the embeded icon, if available.
- Starting with build 20170906/64, the window will automatically use the icon embedded by $EXEICON, without having to call _ICON.
- Keyword Not Supported in Linux or MAC versions.
Example: Embeds a designated icon file into the compiled EXE which can be viewed in Windows Explorer folders.