Page 8 - DCAP408_WEB_PROGRAMMING

Windows Programming

Notes Introduction

Microsoft Windows is a multi-tasking operating system that permits numerous applications,
pointed to here on out as processes. Every process in Windows is specified some amount of time,
known as a time slice, where the application is specified the right to control the system without
being interrupted by the other processes. The runtime precedence and the amount of time
assigned to a process are identified by the scheduler. The scheduler is considered as the manager
of this multi-tasking operating system, making sure that each process is specified the time and
the priority it requires relying on the existing state of the system. Windows is what is known as
an event-driven operating system. This indicates that each process is implemented depending
on the events they obtain from the operating system. For instance, an application may sit at
inactive and wait for the user to press a key. When that key is pressed Windows will record an
event to the application that the key is down.

1.1 The Advantages of Windows

Windows environment provides most of the abilities of executing Microsoft Windows on a PC-
based server and offers the following advantages over other computer systems.

1.1.1 Space Savings

There are some portions of hardware to handle requiring less physical space.

1.1.2 Greater Accessibility and Protection for Your Data

 An integrated Windows server utilizes disk storage, which is usually more dependable
than PC server hard disks.
 You have access to quicker tape drives for incorporated server backups.
 Integrated servers absolutely take advantage of advanced data protection schemes which
occurs in OS/400 like RAID or drive mirroring.
 You can add additional storage to incorporated servers without varying the server off.
 It is probable to achieve access to DB2® UDB for data during an improved Open Database
Connectivity (ODBC) device driver by means of Access. This device driver facilitates
server-to-server applications among integrated servers and OS/400.

 You have the aptitude to use an incorporated server as a second tier in a three-tier client/
server application.
 Virtual networking does not entail LAN hardware and offers communications among
iSeries logical partitions, Integrated Servers , and Integrated Adapters.

1.1.3 Simplified Administration

 User parameters, like passwords, are simpler to manage from OS/400. You can generate
users and groups and register them from OS/400 to incorporated servers. This makes
updating passwords and other user information from OS/400 simple.
 Your computer system is less complex, thanks to the incorporation of user administration
function, security, server management, and backup and recovery plans among the OS/400
and Microsoft Windows environments. You can save your incorporated server data on the

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