Pattern tools as an important part of the software of integrated circuits(IC) test system. Its performance has direct influence on efficiency of automatic test system (ATS).Defined the function structure of pattern tools by analyzing. The key technique for developing pattern tools was researched, and focused on the contrast between the Table Control and the ReportX Control to design pattern tools. After analysis, pattern tools are accomplished through ReportX Control, and embedded in the domestic BC3192 ATE. Finally, in a real environment pattern tools in performance was validated though testing. Flexible application of ActiveX Control technology makes virtual instrument development more complete and powerful.