DefSubclassProc function Null safety comctl32

int DefSubclassProc(
  1. int hWnd,
  2. int uMsg,
  3. int wParam,
  4. int lParam

Calls the next handler in a window's subclass chain. The last handler in the subclass chain calls the original window procedure for the window.

LRESULT DefSubclassProc(
  HWND   hWnd,
  UINT   uMsg,
  WPARAM wParam,
  LPARAM lParam


int DefSubclassProc(int hWnd, int uMsg, int wParam, int lParam) =>
    _DefSubclassProc(hWnd, uMsg, wParam, lParam);