Delphi Full Control of Windows task bar

Core Tip: users of the WINDOWS95/NT/98 operating system know that when Windows starts normally, a task bar appears below the computer screen.

Users of the WINDOWS95/NT/98 operating system know that when Windows starts normally, a task bar appears below the computer screen. From a system functional standpoint, the entire taskbar consists of several different sub-areas, from left to right: The Start button, the application switching area (application switch bar), the taskbar notification area (Notification areas), and the taskbar clock. As with other Windows applications, the taskbar program (Systray.exe) consists of several different forms that have information such as their window class name, display method, and so on. As a result, you can programmatically control the different areas of the Windows taskbar as long as you get information about Windows.

　　1. Programming Ideas

(1) The window information for the taskbar form is:

The window class name for the ① taskbar is: Shelltraywnd.

The window class name for the ② Start button is: button.

The window class name for the ③ application switch area is: ReBarWindow32.

④ the window class name for the notification area of the taskbar is: Traynotifywnd.

The window class name for the ⑤ task bar clock is: Trayclockwclass.

(2) Call the FindWindow function to get the window handle to the taskbar.

(3) Call the FindWindowEx function to get the window handle of each sub-area of the taskbar.

　

(4) According to the window handle, call the ShowWindow function to control the area of the taskbar to show or hide (show/hide), call the En ablewindow function to control the taskbar area is valid or invalid (enabled/disabled).

　　2. Programming methods

(1) Create a new project Project1 in the Delphi3.0 IDE, Project1 contains Form1, as shown in the form:

(2) Define the window handle array: wnd:array[0. 4] of Thandle;

(3) The Gethandles process code is as follows:

Procedure Tform1.gethandles; Begin Get the window handle of tray bar; Wnd[0]:=findwindow (′shelltraywnd′,nil); Get the window handle of the Start button; Wnd[1]:=findwindow (′shelltraywnd′,nil); Wnd[1]:=findwindowex (Wnd[1],hwnd (0), ′button′,nil); Get the window handle of the application switch area; Wnd[2]:=findwindow (′shelltraywnd′,nil); Wnd[2]]:=findwindowex (Wnd[2],hwnd (0), ′rebarwindow32′,nil); Gets the window handle of the notification area of the taskbar; Wnd[3]:=findwindow (′shelltraywnd′,nil); Wnd[3]:=findwindowex (Wnd[3],hwnd (0), ′traynotifywnd′,nil); Get the window handle to the taskbar clock; Wnd[4]:=findwindow (′shelltraywnd′,nil); Wnd[4]:=findwindowex (Wnd[4],hwnd (0), ′traynotifywnd′,nil); Wnd[4]:=findwindowex (Wnd[4],hwnd (0), ′trayclockwclass′,nil); End

http://blog.csdn.net/yanjiaye520/article/details/6659536

Delphi Full Control of Windows task bar