DlgProc typedef Null safety

DlgProc = INT_PTR Function(HWND, UINT, WPARAM, LPARAM)

Application-defined callback function used with the CreateDialog and DialogBox families of functions. It processes messages sent to a modal or modeless dialog box.

Implementation

typedef DlgProc = INT_PTR Function(HWND, UINT, WPARAM, LPARAM);