一个好用的API SPY --- SuperSpy32
SuperSpy32 is an application for monitoring and analyzing API calls from any windows
application to the Win32 API and any API exported from Win32 DLL.SuperSpy32 allows
you to look under the hood of any application and see which DLL methods are called
and what parameters, structures and data blocks are passed and returned. SuperSpy32
is so powerful that an Spy32S script engine is included, Through the Spy32S script,
you can custom the API configure files to monitor and analyze any DLL calls.
Download address
http://www.infoking.com.cn/html/apispy.html