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  • Lifespan of an automation object
  • Allocating an automation object
  • Passing parameters to a method
  • Using an OLE Automation object from a service
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Stored procedures
The Automation keyword is used to declare an automation object. This object is allocated during the declaration. The Automation objects are used to handle software such as Office 2007 (Word, Excel, ...).
Note: You also have the ability to use a dynamic automation object. It is allocated upon request, during the program execution.
Example
// Declare an automation object
MyAutomationObject is Automation object MyServer
// Call to a method of an automation object
MyAutomationObject>>FileOpen(DocName)
Syntax

Declaring an automation object Hide the details

<Automation Object Name> is automation object <Name of Automation Server>
<Automation Object Name>: Character string (without quotes)
Name of the automation object to declare.
<Name of Automation Server>: Character string
Name of the server for the automation object.

Calling a method of an automation object Hide the details

<Name of Automation Object>>><Method Name>([<Parameters>])
<Automation Object Name>: Character string (without quotes)
Name of the automation object to use. This object was declared beforehand.
<Method Name>: Character string
Name of the method of the automation object to run. This method is given by the server.
Note: The list of available methods depends on the server. See the documentation about the server for more details.
<Parameters>: Any type (optional)
Parameters passed to the method. To use the default value of an optional parameter, you have the ability to use "*" or the OLEIgnore constant.
Remarks

Lifespan of an automation object

The automation object is created during its declaration.
The automation object is automatically destroyed at the end of the process containing its declaration.
An automation object declared "global" in the code:
  • that initializes a window (or page) will be destroyed at the end of the process that closes the window (or the page).
  • of project initialization will be destroyed at the end of the closing process of the first window/page of the project.

Allocating an automation object

  • When allocating an automation object, the automation server is automatically started.
  • To allocate an automation object with an existing instance of an automation server, use GetActiveObject.

Passing parameters to a method

  • The methods of automation servers can accept one or more parameters.
  • When calling a method, the sequence of parameters must be respected (see the documentation about the server for more details).
  • With some automation servers, some method parameters are not valued: only the presence of the parameter is important. The value taken by this parameter has no importance.
    For example, the "EditReplace" method of Word Basic accepts 10 parameters, the last one (ReplaceAll) being not valued.
    In WLanguage, any ordinary value can be passed to non-valued parameters.
  • The methods of some automation servers can accept optional parameters located anywhere in the list of parameters.
In WLanguage, the optional parameters must necessarily be found after the mandatory parameters.
To give any ordinary value to an optional parameter, assign the * character to the optional parameter. On the contrary, this character will not be required for the optional parameters found after the last mandatory parameter.
Windows

Using an OLE Automation object from a service

Some of the OLE Automation objects cannot be used by default from a service.
For example, the allocation of an OpenOffice object from a service run with the local system account may trigger an error such as "The automation object com.sun.star.ServiceManager is not installed on your system".
m_oApplication = new Automation object "com.sun.star.ServiceManager"
In this case, the Windows configuration must be adapted to allow the OLE Automation object to be used from a service. The following operations must be performed:
  • Display the control panel of Windows,
  • Select "Management tools",
  • Select "Component service",
  • Expand the following tree structure: Computers/Workstation/DCOM configuration
  • Select "OpenOffice service manager" and display its properties ("Properties" from the popup menu)
  • In the "Identity" tab, select a relevant identity (the user account that will run the application).
Minimum version required
  • Version 9
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