Hi Barry.

>When running SDT.app Programmatically from within my project hook class I get the following error:
>Error#: 1943
>message: Member Font does not evaluate to an object.
>Line#: 79
>from: frmSDT.Init

We don't support SDT 5.1 any more, but I'm guessing the TreeView control didn't get instantiated or something. I agree with Mark: trace the code in the form's Init method to see what's going on.

Doug