Use nested functions as callbacks with Windows API functions?

[Boris-Barboris]

On Monday, 1 October 2018 at 20:27:43 UTC, spikespaz wrote:
> I was hoping I could use something more akin to JavaScript's 
> syntax: (void* hWnd, long) => {}.
>
> I tried this but I'm getting errors with the signature, it says 
> the function is a delegate and apparently Windows API can't 
> accept a delegate.

You can make it a non-delegate by passing a pointer to hWndList 
in lParams as it was supposed to by WinApi devs, instead of zero, 
and not implicitly capturing stack pointer by referencing 
hWndList directly from the body.

https://run.dlang.io/is/t4k4Nc