String Manipulation StrStartWith
hi,
I need a function that says or
a string started (matches) with somestring;
something like this

var string_length
var prefix

Funcion StrStartWith
; find length of string
StrLen $string_length $searched_string
; copy first n charakters
StrCpy $prefix $searched_string $string_length
; compare prefix with maches
StrCmp $prefix $maches jump_lable
FunctionEnd

or StrCmp with offset

is it exist?

Thanks.