It's a Shape control.

I already checked. The object is NOT NULL().



>What is "shpBorder"? My guess is that it is not initiated

*check for  isnull(this.shpBorder)=.t.

at the moment you are trying to set its properties.
>
>>I am creating a tab set for displaying multiple pages on the desktop, just like VS and SQL do.
>>
>>I have created a container with a pageframe on it called App_TabSet.
>>
>>App_TabSet has an AddPane method. A Pane is just a container that gets added to a new page on
>>the App_TabSet pageframe.
>>
>>The Resize of App_TabSet loops through all the pages on the pageframe and calls the Resize of
>>the pane container on each page.
>>
>>The base class Pane container has a shape on it, as a border around the edge. The resize of
>>this base class Pane container has:
>>
>>

>>This.shpBorder.Height = This.Height - (This.shpBorder.Top * 2)
>>This.shpBorder.Width = This.Width - (This.shpBorder.Left * 2)
>>

>>
>>The 'This.Height' and 'This.Width' parts are ok. In the debugger I can see their values.
>>
>>But any reference to This.shpBorder appears in the debugger as an object, but the '+' sign
>>to expand the object and look at its properties is not there. When I drag 'This.shpBorder.Top'
>>down into the Watch Window, it cannot be evaluated.
>>
>>The Pane and the Shape are native VFP controls, not subclassed. All PEM's are public.
>>
>>Anyone know what is happening here?