Is there any method to disable logoff,lock and taskmanager in ctrl+alt+del in C#

Question

On running my window application. if the user press ctrl+alt+del i need to disable these buttons..is there any method

Answer 1

You can not disabled them, but maybe you like to disable the task manager, and or the lock down.

Disable Lock Workstation button:
Hive: HKEY_CURRENT_USER
Key: Software\Microsoft\Windows\CurrentVersion\Policies\System 
Name: DisableLockWorkstation 
Type: REG_DWORD
Value: 1 disable

Disable Task Manager button: 
Hive: HKEY_CURRENT_USER
Key: Software\Microsoft\Windows\CurrentVersion\Policies\System 
Name: DisableTaskMgr
Type: REG_DWORD
Value: 1 disable

Also you can consider

Disable Change Password button: 
Hive: HKEY_CURRENT_USER
Key: Software\Microsoft\Windows\CurrentVersion\Policies\System 
Name: DisableChangePassword 
Type: REG_DWORD
Value: 1 disable

Disable Logoff button: 
Hive: HKEY_CURRENT_USER
Key: Software\Microsoft\Windows\CurrentVersion\Policies\Explorer Note: change from System to Explorer
Name: NoLogoff
Type: REG_DWORD
Value: 1 disable