Hi Tomasz, it seems there are bug in 'dialogitem' macro or somewhere in resource.inc (i don't know)

check attached source code, after compiling our resource section is broken (take a look on resource section with resource editor)

thanks for attention

You should have written:

instead of

The second parameter is a caption, so it must be a string (those macros are perhaps the oldest fasm's macros for Win32, almost unchanged since then - and so they do little checking of parameters).

thanks