In this case something else is different because I cannot reproduce this with your code on my PC.

>I'm using VFP8 RTM. (Sorry for such delay, but I've been busy a little lately.)
>
>>I don't see this with VFP8RTM (Build 2521). Are you using VFP8 RTM or Beta?
>>
>>>MemberClass is a long awaited feature, but...
>>>
>>>I defined classes for column, header and texbox in code.
>>>
>>>

>>>define class _header as Header
>>>	fontname = "Tahoma"
>>>enddefine
>>>
>>>define class _textbox as textbox
>>>	fontsize = 12
>>>enddefine
>>>
>>>define class _column as Column
>>>	add object header as _header
>>>	add object text as _textbox
>>>enddefine
>>>

>>>
>>>Then visually created grid class in vcx class library and set MemberClass prop to _column class defined in previous step.
>>>
>>>After dropping that grid onto form I noticed that chnaged properties of header and textbox in grid's columns are bolded - that means COPIED not INHERITED.
>>>
>>>After rightclicking and choosing "Reset To Default" command inheritance came back. But after saving and reopening form vfox8 again copied changed header and textbox props what breaks inheritance.
>>>
>>>Can anyone confirm that?
>>>