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Robotic process automation(RPA)is one of the current research hotspots.RPA mainly uses Win32 interface to automate the operation of windows.This method requires to encapsulate the API,which is expensive to develop and can only identify UI elements designed based on Win32 API.At the same time,automation based on Win32 interface needs to simulate keyboard and mouse operations.Because these operations are based on a broadcast message mechanism,the response time is long.This paper proposes a solution for building RPA process automation application based on Microsoft's UIA technology.The solution uses UIA methods to automate UI elements.It can adapt to a wide range of UI program frameworks,including Win32,WPF,QT,Silverlight,etc.,and the development cost is low.At the same time,this method binds the message to the UI element,avoids the inefficient broadcast message mechanism,and improves the execution efficiency of RPA.Experimental results show that the execution time can be shortened by 55.67% on average compared with the keyboard and mouse method.