White Screen appears while copying files and directories

Hi All,

In my windows application i am copying files and directories from one location to other location.

While copying the files and directories I am showing progress bar and which FixedDialog. However, problem if i clicked anywhere in the application OR while copying I am doing any other work,

White Screen Appears for that Progress bar and application. Also, on application is shows message as 'Not Responding' though copying is in progress in background.

So how can I improve the performance while copying file and directories ??? I am using recursive function to copy all these stuff.

I have used Application.DoEvents() already but nothing has happened.

Any solution is appreciated.

Regards,

Rohit