Huw Davies (@huw) commented about programs/notepad/dialog.c:
static const WCHAR helpfileW[] = { 'n','o','t','e','p','a','d','.','h','l','p',0 };
static INT_PTR WINAPI DIALOG_PAGESETUP_DlgProc(HWND hDlg, UINT msg, WPARAM wParam, LPARAM lParam); +static INT_PTR WINAPI DIALOG_GOTO_DlgProc(HWND hDlg, UINT msg, WPARAM wParam, LPARAM lParam);
If we were to move `DIALOG_GOTO_DlgProc()` before `DIALOG_EditGoTo()` then we wouldn't need the prototype here (I realise that that could also be said of the page setup stuff, but there's no reason to copy this).