The prevalence of end-user computing has resulted in a need for more effective methods of controlling such computing activities. The present experiment examined the impact of two potential control strategies, behavior-based and outcome-based control, on end-user affective reactions. Results indicated that subjects in the behavior-based control condition reported greater levels of stress, less self-determination, and less process satisfaction than the outcome control group. Further analysis suggested that the detrimental effect of behavior-based control on process satisfaction could be explained through the mediating effect of stress. Implications of the results for the design of effective end-user control strategies are discussed.