>Pardon my ignorance, but why you cannot issue it before the process started.
>If for some reason it's impossible, I found that VFP used to be awaked during some process by things like WAIT Window "" Timeout 0.1

Yes, as seen in my other example, this is what I do. Again, this was my code in the Click():

ThisForm.Enabled=.F.
ThisForm.MyProcess()
ThisForm.Enabled=.T.

But, even by disabling the form, all the clicks are queued and released after this Click() is finished.