See Using the samples for help on compiling, setting up the debugger, and running the sample (either an exe or dll).
Use VS2005 to compile the project.
Open the customize dialog in either ArcMap or a MapControl application and from the ‘.NET Samples’ category drag ‘Subset Raster MT’ tool onto a toolbar.
Add a raster layer to your application and select the tool.
Use the tool to delineate the area which you’d like to subset.
The tool will open a folder selection dialog. Select an output folder for the output raster and click Open.
Once the subset process starts, you will see a progress dialog showing the progress of the subset done by the different threads.
Additional information
Please note that in order to keep the sample as simple as possible, it does not copy colormap form the input raster to the subset raster should it exist on the input raster. In this case the outcome will be a black and white image.
