按键进入非活动窗口

Question

Ima go cry now, I was doing

PostMessage(Spotify, WM_KEYDOWN, 0, VK_SPACE);
//instead of
PostMessage(Spotify, WM_KEYDOWN, VK_SPACE, 0);

It is fixed now tho.

Answer 1

Without knowing anything about the window you are working with, I can only surmise that it is not coded to process keystrokes in its WndProc. You can use Spy++ or similar tool to verify that the messages are actually being sent, but that is no guarantee that they will be processed. You cannot send keystrokes to arbitrary windows that are not expecting them. And BTW, keystroke messages are typically posted to a window's message queue, not sent directly to the window's WndProc, so try using PostMessage() instead.