>What am I doing wrong? The object is not being displayed after I run this code.
>
>oNewObject = NEWOBJECT("msclogo","vfp class library")
>_Screen.oNewObject.Visible = .T.

It doesn't look like you are adding the object to the _Screen object.

Try:

_Screen.NewObject('oNewObject',"msclogo","vfp class library")
_Screen.oNewObject.Visible = .T.

NewObject() just creates a variable without attaching it to anything.