SetFocus

[Fourc00h]

Hello, I'm trying to perform a check to see if a window is open or not. If it is, SetFocus on it. I'm not too sure how to use the function.

Here's the code:

HWND WindowOpen = FindWindow(NULL, "Untitled - Notepad");
if(WindowOpen)
{
	std::cout << "Window is open" << std::endl;
	HWND WINAPI  SetFocus(_In_opt_ HWND hWnd);
}

Since cout isn't working then I'm assuming the condition isn't even being met, that having said, what am I doing wrong here?