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
);

Implementation

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