Introduction
How can you lock your Windows NT based Workstation programmatically? To do this, you just need a little basic knowledge on how to use
user32.dll. Here you will find a function name as
LockWorkStation() and you need to know how to call this function. A sample example with the description of the function
LockWorkStation() is given below:
LockWorkStation(): Locks the workstation's display. Locking a workstation protects it from unauthorized use.
Parameters
This function has no parameters.
Return Value
If the function succeeds, the return value is nonzero. Because the function executes asynchronously, a nonzero return value indicates that the operation has been initiated. It does not indicate whether the workstation has been successfully locked.
If the function fails, the return value is zero. To get extended error information, call
GetLastError. More information can be found at
http://msdn.microsoft.com/en-us/library/aa376875%28VS.85%29.aspx[
^].
Code
Private Sub LockWinNTWorkStation()
Try
LockWorkStation()
Catch ex As Exception
MsgBox("This is not relevant for " _
& Environment.OSVersion.ToString() _
& ". Windows NT based Operating System is required.", MsgBoxStyle.Exclamation)
End Try
End Sub
