Zhiyi Zhang (@zhiyi) commented about dlls/comctl32/tests/toolbar.c:
static void *alloced_str;
-static LRESULT parent_wnd_notify(LPARAM lParam) +#ifdef _WIN64 +#define forward_test_idFrom 0x466e20495bc54f0d
I would prefer using something like 0xdeadbeef and use the same value for 32bit and 64bit.