Your words: "It is IMPOSSIBLE not leave the form".

Task accomplished ... The fact that you did not like the solution is immaterial.

>Sorry Gerry, but this is not a solution into a complex Application,
>it is equivalent to set current Form Modal ( all other form focus not allowed ).
>
>But the big problem is :
>I known the semimodal = fn(inputIntotheCurrentControl), only when i try to lostFocus the current control and i compute fn(inputIntotheCurrentControl).