Active window: the current working window, also known as the current window.

The Windows operating system operates in a window manner, so it is also called a window. Each software is opened in window mode for easy operation. Each window also includes a title bar, menu bar, toolbar (IE has an address bar) operating area, scroll bars and buttons. These windows can be moved and resized. That is the active window.

There can be only one active window in each Windows operating program.