This is a working Hello World example without dependency on Microsoft C Runtime Library, I couldn't find anything by searching around the forums or search engines, so I'm posting it here. Please provide improvements if you feel like something is missing or incorrect.

How to Compile:
dmd "./MessageBox_HelloWorld.d" "user32.lib"

Note: This example can only be compiled with a 32 bit dmd compiler that exists in .\dmd2\windows\bin\dmd.exe

Observations:

• This example will generate a 208kb MessageBox_HelloWorld.exe binary
• This example is independent of MSVCR120.dll
• This example will open additional Command Prompt Window alongside the MessageBox_HelloWorld.exe

MessageBox_HelloWorld.d

module MessageBox_HelloWorld;

// A Win32 API Hello World MessageBox Example without MSVCR120.dll dependency

// Tested on Windows 10, 2022.12.25
// DMD32 D Compiler v2.101.1-dirty


import core.sys.windows.winuser : MessageBoxA, MB_OK;

void main()
{
    MessageBoxA(null, "Hello, World!", "My Win32 App", MB_OK);
}

On Sunday, 25 December 2022 at 18:30:12 UTC, BoQsc wrote:

you might also consider using -m32omf switch to dmd which will make it bundle the old digital mars c lib. this is generally worse but since it is bundled it can be convenient.

to avoid special compile command just add one code line:

pragma(lib, "user32.lib");

On Sunday, 25 December 2022 at 18:30:12 UTC, BoQsc wrote:

My solution, 1068 bytes :)

https://forum.dlang.org/post/trsunkhmxurvvsrsxvgq@forum.dlang.org