Did you receive the sources?

Just tried same code in Delphi. Result - like always in Delphi - works perfect. I'm sure that it works in VC and VB as well as in Delphi. As for me it looks like VFP bug.

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>But, it this an application that requires user's input or it just displays
>status of devices and so on?

Both.

I do not want to waste you time, explaining every aspect of our product, but very briefly it looks like :

The Process screen is divided to two parts : left-hand side displays status of devices(weighing scales), right-hand side is for enter/edit order data for the devices.