dde

[Guest]

I created a DDE link between an excel 2003 file and another applicaition
program for data acquisition.
However, the cell that was linked with the application program only has the
latest data. How can i get the data history?
Thanks! i am a beginner in excel. please give me detail instructions

 

[Tom Ogilvy]

You would have to save the value somewhere else each time it changed. See
the Change Event

http://www.cpearson.com/excel/events.htm

 

[Rody]

Sorry Tom,

The change event will not be triggered when the linked data changes.

Rody

 

[Tom Ogilvy]

From help on the change event:

Occurs when cells on the worksheet are changed by the user or by an external
link.

 

[Rody]

Hi Tom,

My expirience was with XL97. But i tested jus a minute ago the same in
Xl2003. Same result.
On my computer i have a programm called Wonderware Intouch. This app has a
variable with the name $second, and it's a time value.
In my workbook i linked it via DDE, so:

=view|tagname!$second

This should raise the event every second, but it didn't! I can't explain it.
Manualy typing data in a cell did raise the event............

Rody

 

[Tom Ogilvy]

It was my understanding it works (and of course help supports that).
However, as a fall back, the time tested

workbook level property
SetLinkOnData

should work.

 

[Guest]

Tom, thanks for your reply. I tried, it seems that the change event was not
be triggered when the linked data changes.
IS there anything else that i can do?
Thanks

 

[Tom Ogilvy]

It was my understanding it works (and of course help supports that).
However, as a fall back, the time tested

workbook level property
SetLinkOnData

should work.