>for some textbox, I need to disallow user input chinese character,
>How can i detect it ??
>thanks in advance.
I am not sure about Chinese, but for Bulgarian is:
In KeyPress Event of the TextBox put:

LPARAMETERS nKeyCode, nShiftCtrlAlt
IF nKeyCode > 122 && Or whatever code it is
   NODEFAULT
   RETURN
ENDIF