Hoekey Msg|SpotifyMainWindow|256|32|0 not working

[electronixtar]

I wanna send a Space key press to a window class called
SpotifyMainWindow using hoekey, here's my config:

Code

^@F12=Msg|SpotifyMainWindow|256|32|0

It won't work. Did anybody know why?

I tried directly call Win32 API

Code

SendMessage(hWnd_SpotifyMainWindow, WM_KEYDOWN, VK_SPACE, NULL)

and it works fine.