Stopping a process and continue freshly

[Sajith]

Hi,

I have a UI with BUILD and CANCEL button, when i click BUILD, i check weather a file exist, if exist i give a message popup saying copy the file to the location , once the user clicks OK, i need to stop the build process and make user click build again to continue and check if the fail exist again. But now, if the user clicks OK in message Box, the Build Process continues.

Any Suggestions on it!

[JohnOne]

Post it for better help.