>Glenn,
>
>I opened both projects and added some classes (according to the VFP help) by dragging from Project A->B.
>Now when I run Sourcecompare, the classes added to Project 'B' are displayed as differences.
>I have isolated the problem as being that the 'classlibrary' property of the class in Project 'B' still points back to where it was in Project 'A'.
>Any suggestions are appreciated.

Did you hold down shift when you did the drag? Otherwise, all you did is copy it, not move it.