There is a SOAP API available for dataload, allowing you to use a SOAP library to communicate with the Search Appliance. For an overview of SOAP, Please see the SOAP API (here).
The WSDLs for the dataload API can be found on the
page. Providing these WSDLs to whatever tool your language uses,
such as Visual Studio's
wsdl.exe program, should generate the
necessary wrapper class.
The parameters are defined within the WSDL itself, and are generally the same as mentioned above in the Submission Format and Reply Formats, with a few exceptions:
dataloadelement contains a
profileelement in addition to all the
C# Example Project
A C# example project is available that demonstrates using both the
search and dataload SOAP interfaces.
Advanced Tools section of the administration interface, choose
Extra Downloads, and then
Thunderstone Soap Example. Instructions
are listed on that page and within the zip itself for how to use the project.