Searching within files

Hi


There is a folder named RnD. In this folder there are differet files include .aspx like first.aspx, second.aspx etc. Outside this folder there is a file ImageSearch.aspx. i want to write code in ImageSearch.aspx to search within diffrent files which are located in RnD folder. In ImageSearch.aspx there is txtbox and btn control whatever word user write into textbox on btnClick event i want to search that word into different files...Example first.aspx contains Speekers information like Car Speekers,Home Speekers etc with there respective images in a tabular format. if user search for Speekers in ImageSearch.aspx my serch code will search into RnD folder first.aspx and if there is first.aspx contains Speekers word den it will display relative information with image...

currently i'm able to search in single .aspx file but i dont know how to search different files within folder.....


can anyone help me?

thx in advance