How I can pass the WndProc as a parameter?

[Injeckt]

On Saturday, 10 September 2022 at 10:39:12 UTC, Injeckt wrote:
> 

utils.d(52): Error: cannot implicitly convert expression 
`*WndProc` of type `nothrow @system extern (Windows) int(void*, 
uint, uint, int)` to `extern (Windows) int function(void*, uint, 
uint, int) nothrow @system`