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d_rev	2 Jul, 2008 - 04:23 AM Post #1
New D.I.C Head Joined: 2 Jul, 2008 Posts: 2	hi, everybody. I'm developing an internet cafe software. But, I face problem in disable ctrl-alt-del, alt+f4, and alt+tab when the user haven't login. and to enable it again when the user have already login. I really appreciate for your help. Thanks
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born2c0de	2 Jul, 2008 - 10:16 AM Post #2
printf("I'm a %XR",195936478); Joined: 26 Nov, 2004 Posts: 3,716 Thanked 20 times Dream Kudos: 2800 Expert In: C, C++, VB, VB.NET, C#, Java, x86 Assembly, Win32 API, Reversing My Contributions	Instead of disabling the keystroke which performs the unwanted action, you could write code to counter the action itself. For Eg. Ctrl+Alt+Del : Disabling it is not a good idea because the Task Manager can be started in more ways than just Ctrl+Alt+Del. The trick is to disable Task Manager from the Registry. Create a DWORD Value "DisableTaskMgr" in the Key: "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System" and set it to a value of 1. Thus any attempt to start the Task Manager will fail. If you wish to disable the registry, create a DWORD Value "DisableRegistryTools" and set it to 1 in the same key. Note: I have found a way to bypass this protection. You can reset this value programatically. In that case, constantly check for the value being 1 and if not, change it to 1. Alt+Tab : The idea is to prevent your app from losing focus. Simply write the code to set your app as the window in focus in the form's LostFocus Procedure. I think you get the idea.
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