Antonio,
I received your email. Thanks a lot.
I replaced my original FWH libraries (10.1) by the ones you sent me.
I recompiled and linked my application but I got an error which I didn't have before.
When the first dialogbox has to be shown, I got the error :
Cannot create dialogbox
Resource K_OPSTARTEN1
Dialog=>createdlgerror(558)
Since I don't have the changed source of the dialog class, I cannot check it.
I put my original FWH libraries back, and everything is just fine again.
Be careful : I didn't change anything for testing the debugging yet.
Thanks.