The launch of a lazarus application compiled for win32 target causes a DOS box call. After closing the application the DOS box disappears. Is this a known behaviour?

Add {$APPTYPE GUI} to your project source, and recompile. There will be no more DOS box.

If I am correct, this is on the TODO list for the Lazarus project options.

Michael.

This option is already (since this weekend) implemented in the IDE. You can find it on the linking tab in the compiler options dialog. (Choose Run, Compiler Options...).

Vincent.

Did not help 100%. With {$APPTYPE GUI} the application starts without DOS box and exits at once.

Did not help 100%. With {$APPTYPE GUI} the application starts without DOS box and does your application do?

Vincent.

The launch of a lazarus application compiled for win32 target causes a DOS box call. After closing the application the DOS box disappears. Is this a known behaviour?

Yes, this is known behaviour and intended so. It give a bit of debugging information.

If it disturbes you, make lazarus with
make OPT="-WG"

The -WG option is passed to the compiler, which then makes a gui application.

Regards,
Vincent.

I don't know exactly but in Lazarus are many debug assertion and WRITELN('comment about')

if DOS BOX is closed application hang off (they can't write)

Darek

Thank's!
I forgot "-WG" in fpc.cfg!