On Monday, 25 May 2020 at 16:26:31 UTC, Vinod K Chandran wrote:
Here is my full code. Please take a look. https://pastebin.com/av3nrvtT
Change line 124 to:SetWindowSubclass(this.mHandle, SUBCLASSPROC(&btnWndProc), UINT_PTR(subClsID), cast(DWORD_PTR)cast(void*)this);
That is, change `&this` to `cast(void*)this`.