.net - Regular expression lookhead lookbehind -

i need regular expression .net, have input field telephone number.

i use regex format value (050 33 11 00) format:

+32(0)50/33.11.00 

but when insert following value 09 323 23 56 want following result:

+32(0)9/323.23.56 

i've been looking @ lookahead can't find working solution.

i'm using folowing regex: (\x2b{1}3{1}2{1}\x28{1}\d{1}\x29{1}\d{2}\/\d{2}\.\d{2}\.\d{2}) works first value.

the regex placed on textbox editmask, instant live sanitizing.

textedit.mask.editmask = editmask; 

you can use following replacement:

\b0(\d{1,2})\s+(\d{2,3})\s+(\d{2})\s+(\d{2})\b 

this regex match full "words" starting 0, followed 1 or 2 digits, whitespace, 2 or 3 digits, whitespace, 2 digits , again whitespace , 2 digits.

replace +32(0)$1/$2.$3.$4

see demo.