Powerbuilder objects

Obtains the Windows handle of a PowerBuilder object. You can get the handle of the application, a window, or a control, but not a drawing object. The name of the PowerBuilder object for which you want the handle. Objectname can be any PowerBuilder object, including an application or control, but cannot be a drawing object.

Obsolete argument A boolean indicating whether you want the handle of the previous instance of an application.

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You can use this argument with the Application object only. In current versions of Windows, Handle always returns 0 when this argument is set to true. Returns the handle of objectname. If objectname is an application and previous is trueHandle always returns 0. If objectname cannot be referenced at runtime, Handle returns 0 for example, if objectname is a window and is not open.

When you ask for the handle of the application, Handle returns 0 when you are using the PowerBuilder Run command. As far as Windows is concerned, your application does not have a handle when it is run from PowerBuilder. When you build and run an executable version of your application, the Handle function returns a valid handle for the application. If you ask for the handle of a previous instance of an application by setting the previous flag to trueHandle always returns 0 in current versions of Windows.

These statements use an external function called FlashWindow to change the title bar of a window to inactive and then return it to active. The external function declaration is:. For applications, the Handle function does not return a useful value when the previous flag is true.

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You can use the FindWindow Windows function to determine whether a Windows application is already running. FindWindow returns the handle of a window with a given title. View this document as PDF. Chapter PowerScript Functions. Sybase Inc. All rights reserved.In PowerBuilder, DataWindow property expressions use dot notation. These sections explain how to use the expressions and what syntax to use to construct them:. Basic structure of DataWindows and property expressions in PowerBuilder.

Datatypes of DataWindow property expressions in PowerBuilder.

When a DataWindow property expression is evaluated in PowerBuilder. Handling errors from DataWindow property expressions in PowerBuilder. PowerBuilder syntax for DataWindow property expressions.

Each DWObject has a set of properties according to its type. The syntax of a property expression allows you to address any of these properties.

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Following the Object property, you specify a control name and one or more properties. For the full syntax, see PowerBuilder syntax for DataWindow property expressions. Expressions that access data in a DataWindow object using dot notation use the Object and Data properties. The values of DataWindow object properties are strings. This does not mean the datatype is integer or boolean. It is just a convenience when assigning a value to the property. DataWindow property expressions.

In PowerBuilder, the datatype of a property expression is Any not stringbut the value of the data in the Any variable is a string. This may sound like an unnecessary distinction, but it does matter when you use a property expression as a method argument.

Each column, computed field, text control, or drawing control is a DWObject. A DWObject variable takes the place of several elements of the control's dot notation. The following syntaxes and examples show how using a DWObject variable affects property and data expressions.

If the code declares a DWObject variable and assigns the control within the DataWindow to the variable, using syntax like this:. You can use a DWObject variable to refer to a column in a data expression. For example, this syntax gets data for a single row and column:. In PowerBuilder, you can get better performance by using a DWObject variable to resolve the object reference in a DataWindow property or data expression. Evaluating the reference once and reusing the resolved reference is more efficient than fully specifying the object reference again.

This technique yields the most benefit if your application uses compiled code or if you are using a DataWindow expression in a loop.

For example, this code is not optimized for best performance, because the fully specified data expression within the loop must be resolved during each pass:.If a property is marked as "supported r " or " r ", it means that the property can be read in script, but not changed in script, and setting the property in the painter has no effect in the converted application. Color, Detail. Height, Detail.

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Autosize, Detail. Pointer, Footer. Color, Footer. Height, Footer. Pointer, Header. Color, Header. Height, Header. Pointer, Summary. Color, Summary. Height, Summary. Pointer, Trailer. Color, Trailer. Height, Trailer. Pointer, Height. Note: In the Web application, the returned object names are listed in a different order from that in PowerBuilder.

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Botton, Margin. Left, Margin. Right, Margin. Top, Orientation, Page. Range, Page.

powerbuilder objects

RangeInclude, Paper. Size, Paper. Source, Preview, Preview. Rulers, Preview.

Width, CustomPage. When Paper. Size is the default value 0in PowerBuilder application, the default paper size for the printer will be used for the output; while in Appeon Web application, the paper size for the local printer will be used, but if it cannot be obtained, then the monitor screen size for example x will be used. In Appeon Web application, the Copies property will not take effect and only one copy will be printed.

In PowerBuilder, if a printer driver does not support scaling, scaling is not supported in either DataWindow printing or preview. However, in the same scenario on the Web, scaling can work in DataWindow preview. Note: By setting the QueryClear property to Yes, events that are triggered by the property on Web are different from those in PowerBuilder.Table describes each Transaction object property.

For each of the ten connection properties, it also lists the equivalent field in the Database Profile Setup dialog box that you complete to create a database profile in the PowerBuilder development environment.

For information about the values you should supply for each connection property, see the section for your PowerBuilder database interface in Connecting to Your Database. The DBMS identifier for your connection. For a complete list of the identifiers for the supported database interfaces, see the online Help.

For those DBMSs that support the use of lock values and isolation levels, the isolation level to use when you connect to the database. Values you can set are:. For a description of each DBParm parameter that PowerBuilder supports, see the chapter on setting additional connection parameters in Connecting to Your Database. Contains DBMS-specific information. The success or failure code of the most recent SQL operation. The number of rows affected by the most recent SQL operation.

The database vendor supplies this number, so the meaning may be different for each DBMS. View this document as PDF. Chapter Using Transaction Objects. Sybase Inc. All rights reserved. The name of the database to which you are connecting. The name or ID of the user who connects to the database. The password used to connect to the database. The name or ID of the user who logs in to the database server.

The password used to log in to the database server. The name of the server on which the database resides. For more information, see the AutoCommit description in the online Help.OLEObject is a dynamic object type, which means that the compiler will accept any property names, function names, and parameter lists for the object. PowerBuilder does not have to know whether the properties and functions are valid. This allows you to call methods and set properties for the object that are known to the server application that created the object.

If the functions or properties do not exist during execution, you will get runtime errors. Connecting to an object starts the appropriate server:.

Create a new object for an OLE server that you specify. Its purpose is similar to InsertClass for a control. Create a new OLE object in the specified remote server application if security on the server allows it and associate the new object with a PowerBuilder OLEObject variable.

Open an existing OLE object from a file. You do not need to include application qualifiers for the commands. For earlier versions of Microsoft Word, use word. The following commands connect to the Microsoft Word 7. Do not include word. Microsoft Word 7.

For an object in a control, you must use the qualifier application. After your application has finished with the automation, you might need to tell the server explicitly to shut down.

You can also disconnect from the server and release the memory for the object:. You can rely on garbage collection to destroy the OLEObject variable. Destroying the variable automatically disconnects from the server. It is preferable to use garbage collection to destroy objects, but if you want to release the memory used by the variable immediately and you know that it is not being used by another part of the application, you can explicitly disconnect and destroy the OLEObject variable, as shown in the code above.

View this document as PDF. Sybase Inc.SQL statement used repeatedly as the data source for a DataWindow object. The Application object is the entry point into an application. The Application object defines application-level behavior, such as which fonts are used by default for text, and what processing should occur when the application begins and ends.

powerbuilder objects

When a user runs the application, an Open event is triggered in the Application object. The script you write for the Open event initiates the activity in the application. When the user ends the application, the Close event in the Application object is triggered. The script you write for the Close event typically does all the cleanup required, such as closing a database or writing to a preferences file.

Windows are the primary interface between the user and a PowerBuilder application. On the left of the window is a DataWindow control with horizontal and vertical trackbars.

On the right is a group box that contains static text controls containing descriptive labelsedit mask controls as they appear when the SpinControl property is ona check box, and two smaller group boxes with radio buttons. Under the main group box is a command button. A DataWindow object is an object that you use to retrieve and manipulate data from a relational database or other data source such as an Excel worksheet or dBASE file.

Presentation styles DataWindow objects also handle the way data is presented to the user. You can choose from several presentation styles. For example, you can display the data in Tabular or Freeform style. There are many ways to enhance the presentation and manipulation of data in a DataWindow object. For example, you can include computed fields, pictures, and graphs that are tied directly to the data retrieved by the DataWindow.

Display formats, edit styles, and validation You can specify how to display the values for each column, and you can validate data entered by users in a DataWindow object. You do this by defining display formats, edit styles, and validation rules for columns.

If a column can take only a small number of mutually exclusive values, you can have the data appear as radio buttons in a DataWindow so users know what their choices are.

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If the data includes phone numbers, salaries, and dates, you can format the display to suit the data. If a column can take numbers only in a specific range, you can specify a simple validation rule for the data. This can spare you from writing code to make sure users enter valid data. Menus are lists of items that a user can select from a menu bar for the active window. The items on a menu are usually related. They provide the user with commands such as Open and Save As on the PowerBuilder File menu or alternate ways of performing a task for example, the items on the Edit menu in the Window painter correspond to buttons in the PainterBar.

You can select menu items with the mouse or with the keyboard, or use accelerator mnemonic access keys defined for the items.PowerBuilder is an integrated development environment owned by SAP since the acquisition of Sybase in Over the years, PowerBuilder has been updated with new standards. Ina major upgrade of PowerBuilder was released to provide support for the Microsoft.

NET Framework. NET assemblies, in a test-driven manner, using the C language and the. NET Core framework. And PowerScript client app development was revamped with new UI technologies and cloud architecture.

PowerBuilder has a native data-handling object called a DataWindowwhich can be used to create, edit, and display data from the database.

This object gives the programmer a number of tools for specifying and controlling user interface appearance and behavior, and also provides simplified access to database content and JSON or XML from Web services. To some extent, the DataWindow frees the programmer from considering the differences between Database Management Systems from different vendors.

DataWindow can display data using multiple presentation styles and can connect to various data sources. Although new software products are rarely built with PowerBuilder, many client-server ERP products and line-of-business applications built in the late s to early s with PowerBuilder still provide core database functions for large enterprises in government [6] [7] [8]higher education, [9]manufacturing, insurance, banking [10]energy, and telecommunications.

Job openings for PowerBuilder developers are readily available but often revolve around maintaining existing applications. In December SAP announced the new version going directly to number 15 and released a beta version. NET Framework v4. SAP later released this as version On May 31, PowerBuilder was launched by Appeon.

powerbuilder objects

This release supports C development. It provides a new C IDE. NET programming languages is also now supported. Many existing features have also been enhanced. PowerBuilder is an object-oriented programming language. Nearly all of the visual and non-visual objects support inheritancepolymorphismand encapsulation.

powerbuilder objects

The programmer may utilize a common code framework such as PowerBuilder Foundation Classesalso known as PFC, to inherit objects from and leverage pre-existing code. The DataWindow is the key component and selling point of PowerBuilder. The DataWindow offers a visual SQL painter which supports outer joinsunions and subquery operations. This feature makes it easier for developers who are not experienced with SQL. There are many connectivity options that allow performance monitoring and tuning, such as:.

Due to the information about the database schema such as primary key information that are stored in PowerBuilder's data dictionary, the code required to implement data display and browsing is greatly simplified, because the dictionary information allows generation of the appropriate SQL behind the scenes.

It also can use OLE Automation as a client. However, PowerBuilder supports only late binding, not early binding. Therefore, when using OLE Automation, a dropdown of possible actions is not provided.

PowerBuilder can also act as a DDE client or server, providing a further mechanism to interoperate with other applications.

PowerBuilder can make Windows and third-party API calls, and, in general, works well with third-party libraries in DLL files, however it does not directly support callback functions. This can help track down a bug "in the field", as the user simply emails this log file to the developer.

It has another feature which can log all SQL statements to a file. It also has built-in performance profiling, an integrated debugger, context-sensitive help, and an active newsgroup to provide support. PowerBuilder applications are typically compiled to p-code, which is then interpreted by the PowerBuilder run time. Although it can be compiled to machine code called c-codea typical business application does not run a lot faster.


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