The latest studies have adopted software technology to turn the battery-free wireless mouse into a high performance object location detector using a newly developed object location detection program (OLDP). This study extended OLDP functionality to assess whether two patients recovering from cerebral vascular accidents would be able to actively perform occupational activities by controlling their favorite environmental stimulation using battery-free wireless mice and OLDP software. Using an ABAB design we found substantial increases in both participants' target responses (i.e. the performance of "occupational activities") to activate the control system to produce environmental stimulation during intervention phrases. The practical and developmental implications of the findings are discussed. (Contains 5 figures.)