>I created a form using the form designer. I want to change some label control captions during the form load. I can't seem to change the captions of label controls.

The objects haven't been intialized at this point yet. You can either use the Objects' individual Init() event, or the Form's Init() event.

Another possiblity might be to add the expression into the property at designtime, either using the expression builder or adding "=" in front of the expression in the properties sheet.