>>Try this adjustment.
>>
>>

>>RETURN (["CrsSel]+PADL(ALLTRIM(STR(thisform.PageFrame1.ActivePage)),2,"0")+["])
>>

>>
>>IOW return the string you want and not the value stored there.
>
>So, I changed my form method content ( thisform.z_CN() ) to :
>

>RETURN (["CrsSel]+PADL(ALLTRIM(STR(thisform.PageFrame1.ActivePage)),2,"0")+["])
>

>and command line to :
>

>      replace TkCode WITH 1 IN EVALUATE(thisform.z_CN())
>

>but i get Invalid subscript reference error.
>what about this command?
>thanks

Try

RETURN "CrsSel+PADL(ALLTRIM(STR(thisform.PageFrame1.ActivePage)),2,"0")
replace TkCode WITH 1 IN  (thisform.z_CN())