MSQuery: DDE Command Fetch.Unadvise Does Not Break Link

ID: Q149875

The information in this article applies to:

SYMPTOMS

When you use the Microsoft Query Fetch.Unadvise DDE command to break a link that was created with Fetch.Advise, the link may not be broken.

WORKAROUND

To work around this problem, close each query window when you are finished working with it and then create a new one with the Microsoft Query DDE command OPEN. The following macro is an example of using this method.

Microsoft provides examples of Visual Basic for Applications procedures for illustration only, without warranty either expressed or implied, including, but not limited to the implied warranties of merchantability and/or fitness for a particular purpose. The Visual Basic procedures in this article are provided 'as is' and Microsoft does not guarantee that they can be used in all situations. While Microsoft support professionals can help explain the functionality of a particular macro, they will not modify these examples to provide added functionality, nor will they help you construct macros to meet your specific needs. If you have limited programming experience, you may want to consult one of the Microsoft Solution Providers. Solution Providers offer a wide range of fee-based services, including creating custom macros. For more information about Microsoft Solution Providers, call Microsoft Customer Information Service at (800) 426-9400.

To run the macro, do the following:

1. Start Microsoft Query.

2. Create a data source with the name of "Nwind" (without the quotation 

   marks), using the dBASE files included with Microsoft Excel.
3. In the workbook that contains the macro code, make sure there is a 
   worksheet named Sheet1.
4. Type the following procedure into a module sheet: 

   Sub Using_FetchAdvise()
   Dim NumRows
   Dim NumCols

   'create a channel to Query
   chan = DDEInitiate("MSQuery", "System")

   'log onto the NWind data source
   DDEExecute chan, "[Logon('nwind')]"

   'issue a select statement
   DDEExecute chan, "[Open('Select * From Customer')]"

   'request the number of rows and columns in the result set
   NumRows = DDERequest(chan, "NumRows")
   NumCols = DDERequest(chan, "NumCols")

   'return the data to the Excel sheet with a hot link
   DDEExecute chan, "[Fetch.Advise('Excel','Sheet1','R1C1:R" & NumRows(1) _
   & "C" & NumCols(1) & "','All/Headers')]"

   'stops the macro
   'at this point you can go into Query and change the data so that it will
   'update the data on sheet1
   'Press F5 to continue the macro
   Stop

   'close the query window
   DDEExecute chan, "[Close()]"

   'issue a select statement
   DDEExecute chan, "[Open('select * from customer')]"

   'request the number of rows and columns in the result set
   NumRows = DDERequest(chan, "NumRows")
   NumCols = DDERequest(chan, "NumCols")

   'return the data to the Microsoft Excel sheet with a hot link
   DDEExecute chan, "[Fetch.Advise('Excel','Sheet1','R1C1:R" & NumRows(1) _
   & "C" & NumCols(1) & "','All/Headers')]"

   'close the query window
   DDEExecute chan, "[Close()]"

   'logoff of NWind
   DDEExecute chan, "[Logoff('NWind')]"

   'terminate the DDE channel
   DDETerminate chan

   End Sub
5. Run the macro.

STATUS

Microsoft has confirmed this to be a problem in the Microsoft products listed at the beginning of this article. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

REFERENCES

"Microsoft Query User's Guide," version 1.0, Chapter 9, "Using Dynamic Data Exchange with Microsoft Query"

For more information about Fetch.UnAdvise, click the Search button in Microsoft Query Help and type: 

   Fetch

Additional query words: 1.00 2.00 dynamic programmatically programming

Keywords          : xlquery 
Version           : 1.00 2.00
Platform          : WINDOWS

Last Reviewed: June 1, 1999