In order to monitor the computer realtime and realize the software of Screen locking,this article parses the Windows message,researches the principle and method of Windows hook and introduces the implement method in detail.

The relevant technologies include Memory Structure and Management ,Device Context,Dynamic Link Library and Windows Hook.

Application of Windows Hook to Computer Virus;

Study on Pothook of City Construction Land Increase and Rural Residential Land Decrease;

Production cost is vital to an enterprise,how to control production cost is the most important civic event,the paper introduce the optimal design of setting plate for pothook.

The policy of "pothook" of the decrease in rural residential land and the increase in urban construction land is an important land management measure taken by the state.

The structured designs of triggered hook and corresponding bumper were given.

The paper presents an approach to detect the existence of system call hooks set by Trojan horses based on the locality and determinacy of execution flows,and the analysis of system function call labs in both user and kernel levels,then designs and realizes corresponding prototype.

The implementing processes of vector save and hook control algorithm are illustrated detailedly.

Preventing code injection attack with hook in kernel mode;