>>>In the other message, you said lock the keyboard, but this is locking all windows. Is that the same thing?
>>>
>>It prevents any intervention for the application (the user can do nothing with the application, but can work in Office and do other stuff).
>
>I don't understand the usage. What is the parameter when it is not 0?

If you pass .T. it locks the window, if you pass .F. it unlocks it.

tlLock implies that the parameter is logical type (True or false)