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XCalendar is a collection of calendar utilities for Delphi. As you know the Delphi TDateTime type stores date/times as a floating point value representing the time passed from a specific time, or more precisely: The integral part of a Delphi TDateTime value is the number of days that have passed since 12/30/1899. The fractional part of the TDateTime value is fraction of a 24 hour day that has elapsed. A calendar divides time into units, such as weeks, months, and years. The number, length, and start of the divisions vary in each calendar. So any TDateTime value can be decoded to units of an arbitrary calendar and values expressed in units of a calendar can be encoded to TDateTime values. XCalendar contains calendars, database date/time field types, tools to find calendar events and some astronomical stuff.

delphi下的comm串口通讯,一种很实用的方式，读卡器或其他通讯常 常 用到(comm use delphi procedure ,include ReadComm procedure,OpenCOmm Function,comminitialize procedure,MsgcommProcess procedure)

Delphi开机自启动+添加桌面快捷方式源代码实例，编程学习源码，很好的参考资料。(Delphi boot from the start+ add desktop shortcut source code examples, programmed learning source, a good reference.)

用delphi写的时钟程序，界面还不错，模拟了windows的时钟显示。(Written with delphi clock program, the interface is also good, simulate the windows clock display.)

说明：  用delphi开发的软件，实现使用Tab键代替回车(Software developed using delphi to achieve instead of using the Tab key to enter)

PDFview src lib for delphi users , must be users under GPL Lic

说明：  EXIF信息代表的是可交换图像文件信息。当你储存JPEG或者TIFF格式的照片时，这张照片的所有信息都储存在EXIF信息中。几乎所有的相机厂商都支持拍摄的照片输出EXIF信息。(EXIF information represents exchangeable image file information. When you save a photo in JPEG or TIFF format, all information of the photo is stored in EXIF information. Almost all camera manufacturers support the output of EXIF information for photos taken.)

Delphi7实现的计算器，支持表达式计算和Windows XP计算器标准计算两种方式(A calculator implemented in Delphi7， expression calculation as well as Windows XP standard calculation are supported.)

Warnet Billing System

Delphi根据计算机名称获取IP地址，编程学习源码，很好的参考资料。(Delphi to obtain an IP address, computer name based on the source code to learn programming, a good reference.)