On 2014-06-29 06:47, Jeremy Sorensen wrote:
I found an example of boilerplate code for Win32 programming in D here:
http://wiki.dlang.org/D_for_Win32
I have some questions.
1. It appears that the call to myWinMain from WinMain is to ensure that
any exception or error is caught. At first glance it looks like this is
to ensure that runtime.terminate() gets called, but in fact it doesn't,
the catch block doesn't do it and there is no scope(exit). Is this a
problem? (And what would happen if you didn't catch the exception?)
2. Why does the boilerplate return 0 on success and failure? (If the
return code is irrelevant, why the comment that says "failed" next to
the return code?)
3. I can't imagine a technical reason why the myWinMain signature has to
match the WinMain signature. Wouldn't it be better to omit the
hPrevInstance since it isn't used? (Or are we preserving backwards
compatibility with Win16?).
If there is a resource somewhere that explains all this I would happy to
consult it but I couldn't find anything.
You don't need to use WinMain. You can use a plain D main function and
add the "-L/SUBSYSTEM:WINDOWS:4.0" link flag to suppress the console.
There are API's to get access to the arguments passed to WinMain, if
necessary.
--
/Jacob Carlborg
