Thanks for the second eye, Sergey:-)

Should I report it as a 'bug', or are they already aware of it?

I thought that was the case with Help. I have thought about adding a property to the textbox. This project is visual for base classes, so as soon as I hangup, I am going to try:
this.controlsource=this.value - whats a few more lines of code in the SCX:-)

>Hi Terry,
>
>It looks like a bug to me and it still exists in VFP9beta. You can bind textbox to a property to workar ound it.
>

DEFINE CLASS clsTextBox as TextBox
>width=100
>format="Z"
>inputmask="9999999.99"
>left=100
>visible=.t.
>*value=0
>nTxtValue = 0
>ControlSource = "This.nTxtValue"
>ENDDEFINE
>

BTW, it's help omission/error that 'Z' format isn't listed for textbox.
>
>>* I have noticed {ENTER} behavior that just don't seem right! The
>>* attached form has two text boxes. Using tab to navigate at first,
>>* Change the value in the top text box and press {Enter}. Back tab
>>* to the text, and press enter. Note the value changes to 0. Now,
>>* backtab, change to a non zero value and [forward] tab. Back and
>>* forward tab again. The value DOES NOT change to zero.
>>
>>* Note: VFP 8 Help does not list the "Z" format option for
>>* textboxes. Spinners do have "Z". I use it in textboxes anyway
>>* and it works. Even with "Z", {Enter), after changing the value
>>* will still zero it out
>>
>>* Is this "expected behavior"? Is there a way to avoid it?
>>
><snip>