See Using the samples for help on compiling, setting up the debugger, and running the sample (either an exe or dll).
Open the Visual Studio 2005 solution file and build the project. This will add the custom object into the Developer Samples component category as Pick Address.
On the ArcMap Customize dialog box (from Tools, then Customize), click the Commands tab and click the Developer Samples commands category.
From the Developer Samples commands category, drag and drop the Pick Address tool onto a toolbar.
Add a geocoded feature class to the ArcMap document.
Start an edit session and open the attribute table of the geocoded feature class.
Select a record you want to assign a location by clicking a point on the map.
The Pick Address tool will be enabled when there is a geocoded feature class and a record is selected in an edit session. Click the Pick Address tool.
Click the map to specify its location. The geometry of the selected record will be updated and the value in the Status field will be changed to C (stands for coordinate matched).
Select another record and use the tool to get a location on the map.
Save your edits when you are done choosing locations for the addresses.