Hi Cetin,

Thanks for reply my question in short time.

Sorry, my question is not in clean. Beside the "copy","cut"... are disable in MENU, the "invoice","quotation","analysis report"... are disable too.

All of function at MENU are disable after i select "invoice" system from it.
I saw another system is make by VFP b4, he can allowe the user open many document at the same time.