RTD function

Retrieves real-time data from a program that supports COM automation (COM add-in: A supplemental program that extends the capabilities of a Microsoft Office program by adding custom commands and specialized features. COM add-ins can run in one or more Office programs. COM add-ins use the file name extension .dll or .exe.).



ProgID     the name of the ProgID of a registered COM automation add-in (add-in: A supplemental program that adds custom commands or custom features to Microsoft Office.) that has been installed on the local computer. Enclose the name in quotation marks.

server     name of the server where the add-in should be run. If there is no server, and the program is run locally, leave the argument blank. Otherwise, enter quotation marks ("") around the server name. When using RTD within Visual Basic for Applications (VBA) (Visual Basic for Applications (VBA): A macro-language version of Microsoft Visual Basic that is used to program Microsoft Windows-based applications and is included with several Microsoft programs.), double quotation marks or the VBA NullString property are required for the server, even if the server is running locally.

topic1, topic2,...     1 to 253 parameters that together represent a unique piece of real-time data.


  • The RTD COM automation add-in must be created and registered on a local computer. If you haven't installed a real-time data server, you will get an error message in a cell when you try to use the RTD function.
  • When the server has been programmed to continually update results, unlike other functions, RTD formulas will change when Microsoft Excel is in automatic calculation mode.


Formula Description (Result)
=RTD("MyComAddIn.Progid",,"LOREM_IPSUM","Price") Data
Applies to:
Excel 2007