>I want to copy phone no from my slected into in my textbox /editbox with"," (sapreated with)","
>1234,567,789 into textbox/edit box
>thanks

maybe something like

textbox2.value=transform(textbox1.value, "9999,999,999")

Note that after this textbox2.value is a string. If it's bound to a numeric controlsource, you should get an error somewhere.