connecting to custom command bar

I have a custom toolbar written by someone else which works perfectly fine. It helps us connect up to an IBM mainframe and download data to an Excel file.

(toolbar is called ISeries Access bar for those that know the name).

I now want to access said toolbar programmatically and download several stored queries automatically.

Eventually I want Access to hook up to this and pull the data in but connecting from Access to Excel I can do. Connecting to this custom toolbar I can't and don't have any documentation on it.

I can't record steps from the macro recorder (it records an empty macro) and I can't record steps from Mercury Winrunner very well (it gets confused when I try to run the script a second time).

Any suggestions about how to activate a custom tool on a custom toolbar when you don't have the documentation for it, etc.?

Becky Mack