The largestring test allows to send a multiple number of echoString webservice requests to the interop base service. With each request, a string of length equal to current iteration number is sent .the n the number of iterations can be specified an argument to the test. This test will check two aspects. The size of a payload and repated invocations of soap method from one stub object. Building and running on win32 To build the sample and run generate stubs in to a folder named gen_src beneath this folder and compile using the alltests workspace, and then run.