In a climate of continual change and innovation, lifelong learning is a critical professional development objective which has a direct impact on organizations' effectiveness and ability to compete and innovate. To help learners continually upgrade their skills and knowledge so they can effectively address emerging organizational and professional needs and opportunities, educators must prepare learners for their professions using teaching methodologies that develop learners' capacity for and disposition toward lifelong learning. Problem-based learning (PBL) is one such method. PBL uses professional problems of practice as a starting point, stimulus, and focus for student activity, and one of PBL's stated educational outcomes is students' use of lifelong learning skills. This study examined the changes in students' use of lifelong learning skills while participating in a PBL project. Twenty-six undergraduate university computer science students completed a 15-week C++ programming course. Using guided reflective journal responses as process data, students were observed to increase their application of lifelong learning skills during their PBL experience. Design and research recommendations are shared. (Contains 4 tables and 3 notes.)