Foreground Vs Active window
问题 In Windows, what is the difference between foreground and active window? To be specific, under what circumstances can a foreground window not be an active window? If the 2 terms are referring to the same concept why there're 2 terms. The msdn documentation here mentions "clicking a window, or by using the ALT + TAB or ALT + ESC key combination" makes a window active as well as foreground. There is nothing explicitly about the difference between the 2 terms.Check MSDN. 回答1: The active window