An api monitor tool which can automatic tracing all apis input and output parameters. this application will auto trace the target program and monitor the input and output of function call. The software can help us to analysis program errors, process inside the target program. Unlike others apispy or api monitor tools, the software did not need to develop any dll or hook dll. Functions A Best API Monitor tool. Automatic analysis parameter type with pdb files.(new in V4.0) Supporting tracing COM and activex Interface. Supporting monitor multithread. Supporting spying the parameters of function before and after the function is called. Supporting the function that the target program will dump CallStack when exception occurs. Supporting Plug-in technology. The user can custome input format and output format. Not need to know the prototype of the functions. All the API functions, including the opened functions that are called inside the DLL, can be monitored in deed.