怎么判断窗口是不是最底层窗口，最顶端窗口可以用GetTopWindow实现，那最底端呢

[Geralt14]

怎么判断窗口是不是最底层窗口，最顶端窗口可以用GetTopWindow实现，那最底端呢

[赵4老师]

GetNextWindow The GetNextWindow function retrieves a handle to the next or previous window in the Z order. The next window is below the specified window; the previous window is above. If the specified window is a topmost window, the function retrieves a handle to the next (or previous) topmost window. If the specified window is a top-level window, the function retrieves a handle to the next (or previous) top-level window. If the specified window is a child window, the function searches for a handle to the next (or previous) child window. HWND GetNextWindow( HWND hWnd, // handle to current window UINT wCmd // direction flag ); Parameters hWnd Handle to a window. The window handle retrieved is relative to this window, based on the value of the wCmd parameter. wCmd Specifies whether the function returns a handle to the next window or of the previous window. This parameter can be either of the following values: Value Meaning GW_HWNDNEXT Returns a handle to the window below the given window. GW_HWNDPREV Returns a handle to the window above the given window. Return Values If the function succeeds, the return value is a handle to the next (or previous) window. If there is no next (or previous) window, the return value is NULL. To get extended error information, callGetLastError. Remarks Using this function is the same as calling the GetWindow function with the GW_HWNDNEXT or GW_HWNDPREV flag set. QuickInfo Windows NT: Requires version 3.1 or later. Windows: Requires Windows 95 or later. Windows CE: Unsupported. Header: Declared in winuser.h. Import Library: Use user32.lib. See Also Windows Overview, Window Functions, GetTopWindow Window Functions The following functions are used to create and manage windows. AdjustWindowRect AdjustWindowRectEx AnimateWindow ArrangeIconicWindows BeginDeferWindowPos BringWindowToTop CascadeWindows ChildWindowFromPoint ChildWindowFromPointEx CloseWindow CreateWindow CreateWindowEx DeferWindowPos DestroyWindow EnableWindow EndDeferWindowPos EnumChildProc EnumChildWindows EnumThreadWindows EnumThreadWndProc EnumWindows EnumWindowsProc FindWindow FindWindowEx GetClientRect GetDesktopWindow GetForegroundWindow GetLastActivePopup GetNextWindow GetParent GetTopWindow GetWindow GetWindowPlacement GetWindowRect GetWindowText GetWindowTextLength GetWindowThreadProcessId IsChild IsIconic IsWindow IsWindowUnicode IsWindowVisible IsZoomed MoveWindow OpenIcon SetForegroundWindow SetParent SetWindowLong SetWindowPlacement SetWindowPos SetWindowText ShowOwnedPopups ShowWindow ShowWindowAsync TileWindows WindowFromPoint WinMain