Does the WInMain function is mandatory ?

[Mike Parker]

On Sunday, 30 September 2018 at 14:06:20 UTC, Vinod K Chandran 
wrote:

>
> Thanks. It worked.
> I  would like to compile this as a gui. Now it starts with the 
> cmd. Google search didn't gave me the link i want. Any help ?

With the default OPTLINK linker:

dmd -L/SUBSYSTEM:windows app.d

In this case, user32.lib where MessageBoxW and MessageBoxA reside 
is automatically linked.

When using the MS linker:

dmd -m64 -L/SUBSYSTEM:windows -L/ENTRY:mainCRTStartup app.d 
user32.lib

In this case, user32.lib is not automatically linked. Replace 
-m64 with -m32mscoff for 32-bit output with the MS linker.

-L passes command line options to the current linker.