You have two forms over here in your application. The second form display on click event of some controls, which is available in first form. Am i right so far ?. If so, Probabily you will be doing any custom panel paint or default. If you are doing custom painting then try to impliment Double Buffering techinicsin your paint event handler. If not, insted of repainitng (form itself will do repainting when you chnage the status of container controls), only try to Invalidate contained controls which are really nessasary to paint. Note : (1) Double Buffering. (2) Control Invalidating. Please do little home work on the above mentioned ideas. Sreejith Nair [ My Articles ]

This is a known bug[^]. There is no work around. RageInTheMachine9532 "...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Create a webservice method that accepts a byte[] as a parameter then just call the method with the zip as a byte[]. Then just rebuild the zip on the webservice side.

Thanks for reply. If any one have idea about any other free library then please give me reference. thanks

You need to register your custom extension with the Shell. Refer to the 'Integrating with the Shell' topic in the following article: Creating Document-Centric Applications in Windows Forms, Part 2[^]. Roger Stewart "I Owe, I Owe, it's off to work I go..."