need to get folder path in text box on button click

Hi All
1) I have a text box and a button. When i chick the buttonn i need to get the browse option so that i can browse all folders in my system, after that if i select the folder the folder path should be displayed in TextBox. like C:/Users/Tom/   in textbox.  
2) Now i have  a list box it should display all the .docx files present in the folder.
 
I am using WebForms (not Winforms) .... Can you guys pls suggest me with something... its urgent...
I have read many articles on FileUploadControl but it does not solve mine... mine is a little different task...
Just tell me how to get the folder path on button click..
 
Thanks in advance..
 
 
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