Add tool feature: hide console window at the runtime

[ilopX]

Hide console window

When you run a GUI application written and compiled with dart, a console appears that can be hidden with this tutorial.

How to

1. First build your program

cd win32
dart compile exe .\example\hello.dart -o .\example\bin\your_app.exe

2. Then run the patch

dart .\tool\hide_console\switch_subsystem.dart GUI .\example\bin\your_app.exe

3. Run your application and enjoy

call .\example\bin\your_app.exe

Return the console back

dart .\tool\hide_console\switch_subsystem.dart CONSOLE .\example\bin\your_app.exe

How it works

The dart script switch_subsystem.dart replaces bytes in the PE header (your_app.exe). This changes the system flag from WINDOWS:CONSOLE to WINDOWS:GUI.

final IMAGE_SUBSYSTEM_WINDOWS_GUI = [98, 52, 68, 0, 2];
final file = File('your_app.exe').openSync(mode: FileMode.append);
file.setPositionSync(START_PE + SUBSYSTEM_PE);
file.writeFromSync(IMAGE_SUBSYSTEM_WINDOWS_GUI);