Messagebox is displaying problem

Hi

One of our user is using Windows NT workstation. The user is running a application on that mechine. All of a sudden, the messagebox displayed by the application, is being displayed at the right-bottom corner of the screen. The messagebox is a Model window.The same application is being used by other users and they are fine.

I belive Windows operating system will be having a rigistry setting to display the Modal windows and this setting might have been changed by some reason. I would like to know in which rigistry that setting will be.

Thanks in advance