Zhiyi Zhang (@zhiyi) commented about dlls/comctl32/tests/button.c:
static struct msg_sequence *sequences[NUM_MSG_SEQUENCES];
+static void CALLBACK msg_winevent_proc(HWINEVENTHOOK hevent,
DWORD event,HWND hwnd,LONG object_id,LONG child_id,DWORD thread_id,DWORD event_time)
Let's avoid mixing tabs and spaces for new code.