This function brings the specified window to the top of the z-order. If the window is a top-level window, it is activated. If the window is a child window, the top-level parent window associated with the child window is activated.
Nonzero indicates success. Zero indicates failure. To get extended error information, call GetLastError.
Use the BringWindowToTop function to uncover any window that is partially or completely obscured by other windows.
Calling this function is similar to calling the SetWindowPos function to change a window's position in the z-order. BringWindowToTop does not make a window a top-level window.
If an application is not in the foreground and wants to be in the foreground, it should call the SetForegroundWindow function.