How do you focus on a specific window using winapi?

My goal is to make a function similar to this but using an HWND window object as the parameter.

Things I've tried:

ShowWindow(hwnd, SW_RESTORE);
SetWindowPos(hwnd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE);
SetActiveWindow(hwnd);
SetForegroundWindow(hwnd)
SetFocus(hwnd);
SendMessage(hwnd, WM_SETFOCUS, 0, 0);
PostMessage(hwnd, WM_SETFOCUS, 0, 0);

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