hi all....i have small problem with replacement of part of a character array..... my problem is i have character buffer buff[] the content in it is "DESCRIBE rtsp://<ip-addr>:9000/2.sdp RTSP/1.0 CSeq: 1 Bandwidth: 384000 Accept-Language: en-US User-Agent:Windows NT 5.1Service Pack 2)" now here i want to replace "9000" with the number i wish....how can i do it... please help me out..... thank you....