>>>David,
>>>
>>>Changing a property in one instance of a form won't change the same property in another instance. Take another look :)
>>
>>It does seem to do this. I have two numeric fields on my form,(which are each properties of the form). In the first form, when I select a customer, I have code that sums the total value, say 5122.30, for that customer to one of the forms properties.
>>
>>In a second instance of the form, I select a different customer, and the sum total is say 4120.10. Now if I go back to the first instance of the form, it shows 4120.10 in the text box (instead of remaining 5122.30).
>>
>It sounds to me like the controlsource of the textbox in question is set to a field reference.

I checked this, but both controlsources are Thisform.myvalue1 and Thisform.myvalue2 respectively.

(I am using VFP 5.0, and am running the forms in the same VFP session.)

Regards