Avinash,

 

>>. I want to open "Insert Image" dialog box with "Minimize", "Restore" and "Close" button. ( i.e. Default Browser buttons on Title bar).

 

Pease set UseStandardDialog property to true then try again.

 

Demo:

 

 

>>2. How can I compress an Image after uploading it to server. (i.e. On which event I should call my "Compress" subroutine)

 

This feature is not supported. The only option for you is modifying the source code of this solution.