PB 应用可以通过多种途径来构建，但同时也要遵循一些基本规则以及避免一些常见的漏洞。如果您的应用不符合本章节列出的基本要求和架构要求，可能会导致应用无法成功迁移到 Web 上，或者迁移后性能不好，或者在迁移后出现性能和稳定性问题。

此章节提供了 Appeon for PowerBuilder 5.0 （简称 APB 5.0 ） 对于 PB 特性的概要支持情况。根据 PB 特性支持情况的不同， APB 5.0 提供了两个版本： APB 高级版与 APB 企业版。另外，在 APB 支持的 PB 特性当中，有部分已经实现了完全支持，而有一些则只是部分支持（比如，对于一个对象的某些特定事件、属性或者函数，还没有实现支持）。

注意：此章节旨在列出 APB 5.0 对于一些常用的重要 PB 特性的支持情况，而非涵盖到具体某个特性的详细支持与不支持情况。

APB5.0 高级版提供了纯 JavaScript 发布方式；而 APB5.0 企业版则提供了纯 JavaScript 发布与 Appeon 加速发布两种发布方式。与纯 JavaScript 方式相比， Appeon 加速版对 PB 提供更丰富更强大的特性支持。

关于完整的特性列表清单以及更多相关详情，请参阅 艾普阳 支持特性指南 或者 艾普阳 特性帮助 。

Controls

Supports 34 PowerBuilder controls including:
CheckBox, CommandButton, DataWindow, DropDownListBox, DropDownPictureListBox, EditMask, GroupBox, HProgressBar*, HScrollBar*, HTrackBar*, Line, ListBox, ListView, MultiLineEdit, OLEControl*, OLECustomControl*, Oval*, Picture, PictureButton, PictureHyperlink, PictureListBox, RadioButton, Rectangle, RoundRectangle*, SingleLineEdit, StaticHyperlink, StaticText, Tab, TreeView, VProgressBar*, VScrollBar*, VTrackBar*,Graph*, RichTextEdit*.

System Objects

Supports 32 PowerBuilder objects including:
Application, Connection, CORBAObject, DataStore, DataWindowChild, DragObject, DWObject, DynamicStagingArea, Environment* , GraphicObject, ListViewItem, MenuCascade* , mailFileDescription*, mailMessage*, mailRecipient*, mailSession* , MDIClient, Menu (including Toolbar), Message, NonVisualObject, OLEObject, PowerObject, Transaction, TreeViewItem, UserObject, Window, WindowObject, DynamicDescriptionArea*, Inet*, InternetResult*, Timing*, DrawObject*.

Window

• Window types: All Window types including MDI sheet, MDI and MDIHelp, Main, Child, Popup and Response
• Document interface: Multiple Document Interface (MDI) and Single Document Interface (SDI)

DataWindow

Robust DataWindow support:

• DataWindow Presentation Styles: Composite, Crosstab, Freeform, Group, Graph, Grid, Nested, Label, N-Up, Tabular, RichText
• DataWindow Bands: Header, Detail, Footer, Trailer*& Summary
• DataWindow Buffers: Primary, Filter, Delete
• DataWindow Data Sources: SQL, Query, Stored Procedure, External
• DataWindow Column Style Types: EditMask, Edit, CheckBox, DropDownDataWindow, DropDownListBox, and RadioButton
• DataWindow Child: DataWindowChild with almost all DataWindow functions
• DataWindow Controls: Button, Column , ComputedField, GroupBox*, Line, Oval* , Picture*, Report*, Rectangle*, RoundRectangle*, Text
• DataWindow Describe & Modify
• DataWindow ImportFile* & ImportString* functions
• DataWindow ShareData & ShareDataOff
• DataWindow Dot Notation
• DataWindow Expressions & Operators
• DataWindow Validation Rules
• DataWindow Printing & SaveAs Automatically (No Coding) for PDF, Excel, HTML & Text

• Dynamic Tab Pages - OpenTab*, OpenTabWithParm* and CloseTab* functions

User Objects

• Custom class user objects
• Custom visual user objects
• Standard class user objects
• Standard visual user objects
• Dynamic User Objects: OpenUserObject*, OpenUserObjectWithParm* and CloseUserObject* functions
• N-tier NVOs - learn more about this powerful new feature

PowerScript Features

• PowerScript Statements
  Assignment, CALL, CHOOSE...CASE, CONTINUE, CREATE, DESTROY, DO¡­LOOP, EXIT, FOR¡­NEXT, HALT, IF¡­THEN, RETURN, TRY...CATCH... FINALLY
• Reserved Words
• Pronouns (This, Parent, Super)
• Identifiers
• Operators & Expressions
• ASCII Characters (~n, ~t, etc.)
• Data Types & Constants
  Supports all standard data types:
  Blob* , Boolean, Char or character , Date, DateTime, Decimal, Double, Int or Integer , Long, Real, String, Time, UInt, ULong, UnsignedInt, UnsignedInteger, UnsignedLong
• Arrays
• Structures
• Null Values
• Statement Continuation/Separation
• Comments
• Object-Oriented Programming: Inheritance, Encapsulation, Polymorphism

Events & Functions

• User Defined Events & Functions
• Global and Object Events & Functions
• Triggering & Posting Events
• Static Calls to Events & Functions
• Dynamic Calls to Events & Functions
• Extending, Overriding, and Overloading Events & Functions
• Arguments & Return Values
• External INI file, Registry and DLL support

System Functions

Array functions, Blob Functions*, Data Type Checking and Conversion functions, Date, Day, and Time functions, File Functions*, International functions, Miscellaneous functions, Numeric functions, Print* & Printer* functions, Registry functions, String functions, System and Environment functions, Timing functions, Window functions, DDE Client Functions*

Embedded SQL

• Cursor/Non-Cursor SQL Statements
• Dynamic SQL Statements - Format 1, 2, 3 and 4
• Stored Procedure SQL Statements
• Transaction Management