Windows 7 x64. Prevent appearing of console with GUI application

[Mike Franklin]

On Tuesday, 24 July 2018 at 08:09:33 UTC, ANtlord wrote:

> So... how prevent appearing of console on the startup of the 
> application?

Here's my test
---
module HelloMsg;

import core.runtime;
import std.utf;
import core.sys.windows.windows;

auto toUTF16z(S)(S s)
{
     return toUTFz!(const(wchar)*)(s);
}

extern (Windows)
int WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR 
lpCmdLine, int iCmdShow)
{
     int result;
     void exceptionHandler(Throwable e) { throw e; }

     try
     {

         Runtime.initialize();
         result = myWinMain(hInstance, hPrevInstance, lpCmdLine, 
iCmdShow);
         Runtime.terminate();
     }
     catch (Throwable o)
     {
         MessageBox(null, o.toString().toUTF16z, "Error", MB_OK | 
MB_ICONEXCLAMATION);
         result = 0;
     }

     return result;
}

int myWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR 
lpCmdLine, int iCmdShow)
{
     MessageBox(NULL, "Hello, Windows!", "Your Application", 0);
     return 0;
}
---

dmd -L/SUBSYSTEM:WINDOWS main.d
main.obj : error LNK2019: unresolved external symbol MessageBoxW 
referenced in function WinMain

dmd -L/SUBSYSTEM:WINDOWS main.d User32.lib
Success!

Executing from PowerShell: no console
Executing from Command Prompt: no console
Double-clicking in Explorer: no console

Windows 10 64-bit

Mike