C # Right-click the taskbar and use the mouse hook to shield the menu

Recently, I encountered a problem that I needed to block the right-click menu on the taskbar. I had a tip, and I wanted to help people who needed it.

After checking the information for half a day on the Internet, you can modify the Registry. However, it is quite uncomfortable to restart the machine. You can also use the mouse hook to capture the right-click message for the purpose. Note that the menu will pop up only when the right-click button is released (because only the message pressed by the mouse is intercepted, the program has been failing, and I was skeptical about the possibility of using a hook. Oh, be careful ).

I will not elaborate on the use of C # To call windows APIs and hooks. Refer

Http://blog.csdn.net/LeoMaya/archive/2007/05/18/1615052.aspx

Http://blog.csdn.net/wztgq/archive/2006/08/02/1012132.aspx

There are also two API browsers, which are pretty good

Foxapi Chinese function browser v1.5(Detailed descriptions of API functions are provided)

API explorer v2.82(API functions can be converted to C # and VB. NET code)

After debugging in Visual Studio 2005, the project can be downloaded at http://download.csdn.net/source/536490.

 

/// Author: danseshi // Email: danseshi@yahoo.com.cn // Bolg: http://blog.csdn.net/danseshi////Date:2008.7.12using system; using system. windows. forms; using system. drawing; using system. runtime. interopservices; using system. diagnostics; namespace mousehook {public partial class form1: FORM {# region fields private int hmousehook = 0; // global hook constant private const int wh_mouse_ll = 14; // declare the constant of the message, press and release private cons T int wm_rbuttondown = 0x204; private const int wm_rbuttonup = 0x205; // Save the private rectangle taskbarrect In the rectangular area of the taskbar; private rectangle newtaskbarrect; // define the delegate Public Delegate int hookproc (INT ncode, int wparam, intptr lparam); Private hookproc mousehookprocedure; # endregion # region declares the API function and requires the introduction of space (system. runtime. interopservices) // find the qualified window [dllimport ("user32.dll", entrypoint = "findwindow")] public St Atic extern int findwindow (string lpclassname, string lpwindowname); // obtain the rectangular area of the window [dllimport ("user32.dll", entrypoint = "getwindowrect")] public static extern int getwindowrect (INT hwnd, ref rectangle lprect); // install hook [dllimport ("user32.dll")] public static extern int setwindowshookex (INT idhook, hookproc lpfn, intptr hinstance, int threadid); // uninstall the hook [dllimport ("user32.dll", entrypoint = "unho Okwindowshookex ")] public static extern bool unhookwindowshookex (INT hhook); // call the next hook [dllimport (" user32.dll ")] public static extern int callnexthookex (INT idhook, int ncode, int wparam, intptr lparam); // obtain the identifier of the current thread [dllimport ("kernel32.dll")] public static extern int getcurrentthreadid (); // obtain the module handle of an application or dynamic link library [dllimport ("kernel32.dll")] public static extern intptr getmodulehandle (string Nam E); // The mouse structure, saving the mouse information [structlayout (layoutkind. sequential)] public struct mousehookstruct {public point pt; Public int hwnd; Public int whittestcode; Public int dwextrainfo;} # endregion public form1 () {initializecomponent ();} /// <summary> /// installation hook /// </Summary> private void starthook () {If (hmousehook = 0) {hmousehook = setwindowshookex (wh_mouse_ll, mousehookprocedure, getmodulehandle (proce SS. getcurrentprocess (). mainmodule. modulename), 0); If (hmousehook = 0) {// If the hook fails to be set. this. stophook (); MessageBox. show ("set Windows Hook failed! ") ;}}/// <Summary> // uninstall hook // </Summary> private void stophook () {bool stop = true; If (hmousehook! = 0) {stop = unhookwindowshookex (hmousehook); hmousehook = 0; If (! Stop) {// MessageBox. Show ("unhook failed! ") ;}} Private int mousehookproc (INT ncode, int wparam, intptr lparam) {If (ncode> = 0) {// convert the data indicated by the lparam parameter in the memory to the mousehookstruct structure mousehookstruct mouse = (mousehookstruct) Marshal. ptrtostructure (lparam, typeof (mousehookstruct); // mouse // This sentence is used to view the mouse position this. TEXT = "mouseposition:" + mouse.pt. tostring (); If (wparam = wm_rbuttondown | wparam = wm_rbuttonup) {// intercept if (newtaskbarrect. contain S (mouse.pt) {// when the mouse is in the range of the taskbar // if 1 is returned, the message ends. This message is no longer transmitted until now. // If the return value is 0 or the callnexthookex function is called, the message returns this hook and continues to be transmitted, that is, to the real receiver of the message: return 1; }}return callnexthookex (hmousehook, ncode, wparam, lparam) ;}# region events private void formateload (Object sender, eventargs e) {mousehookprocedure = new hookproc (mousehookproc ); // taskbarhandle is the handle of the returned taskbar // shell_traywnd is the class name of the taskbar int taskbarhandle = findwindow ("shell_traywnd", null); // obtain the area of the taskbar // note that, when the function returns, taskbarrect contains the screen coordinates in the upper left corner and lower right corner of the window. // that is, taskbarrect. width and taskbarrect. height is the value (0, 0) relative to the upper left corner of the screen. // This is different from the rectangle structure of C #. getwindowrect (taskbarhandle, ref taskbarrect); this. richtextbox1.text = "taskbarrect. location: "+ taskbarrect. location. tostring () + "/N"; this. richtextbox1.text + = "taskbarrect. size: "+ taskbarrect. size. tostring () + "/n"; // construct a rectangle structure in C # newtaskbarrect = new rectangle (taskbarrect. x, taskbarrect. y, taskbarrect. width-taskbarrect. x, taskbarrect. height-taskbarrect. y); this. richtextbox1.text + = "newtaskbarrect. location: "+ newtaskbarrect. location. tostring () + "/N"; this. richtextbox1.text + = "newtaskbarrect. size: "+ newtaskbarrect. size. tostring ();} private void form=formclosing (Object sender, formclosingeventargs e) {This. stophook ();} private void button#click (Object sender, eventargs e) {This. starthook (); this. button1.enabled = false; this. button2.enabled = true;} private void button2_click (Object sender, eventargs e) {This. stophook (); this. button1.enabled = true; this. button2.enabled = false;} # endregion }}