Visual Basic

Sub IPchange()
        Try
            Dim inPar, outPar As ManagementBaseObject
            Dim mc As New ManagementClass("Win32_NetworkAdapterConfiguration")
            Dim moc As ManagementObjectCollection = mc.GetInstances()
            For Each mo As ManagementObject In moc
                If DirectCast(mo("IPEnabled"), Boolean) Then
                    inPar = mo.GetMethodParameters("EnableStatic")
                    inPar("IPAddress") = New String() {txtIP.Text}
                    inPar("SubnetMask") = New String() {txtSubnet.Text}
                    outPar = mo.InvokeMethod("EnableStatic", inPar, Nothing)
                    flag = True
                    MsgBox("IP Address successfully changed!!!", MsgBoxStyle.Information, "IP Changed")
                    Exit For
                End If
            Next
        Catch ex As Exception
            MsgBox("Error:" & ex.Message, MsgBoxStyle.Critical, "Error")
            txtIP.Enabled = True
            txtSubnet.Enabled = True
            flag = False
        End Try

Try
            Dim t As Single
            Dim objWMIService, objComputer As Object
            objWMIService = GetObject("Winmgmts:root\cimv2")
            objComputer = objWMIService.InstancesOf("Win32_NetworkAdapterConfiguration")
            ' Call always gets only one Win32_ComputerSystem object.
            For Each objComputer In objWMIService.InstancesOf("Win32_NetworkAdapterConfiguration")

                t = objComputer.EnableDHCP()
                If t <> 0 Then
                    'MsgBox("Error!!! Cann't enable DHCP at this time.", MsgBoxStyle.Critical, "Error")
                Else
                    MsgBox("DHCP Enabled!!!", MsgBoxStyle.Information, "Enable DHCP")
                End If

            Next
        Catch ex As Exception

        End Try

... the ultimate solution

... the ultimate solution

groupitvn wrote:

How can i lock Ctrl+Alt+Del Keys (do not show task manager) ?

And how can i hide my desktop screen (such as screensaver) by my program ?

Guffa wrote:

You can't.

Dave Kreskowiak wrote:

there is no REASONABLE way to do it

Original Question:

How can i lock Ctrl+Alt+Del Keys (do not show task manager) ?

EricDV wrote:

Disabling Ctrl+alt+Del is unreasonable, sure. But changing a single registry setting so that the task manager cannot come up is quite simple.

Dave Kreskowiak wrote:

I was just commenting on disabling Ctrl-Alt-Del, nothing more.

EricDV wrote:

I hope my etiquette has not been rude or inappropriate.