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Teklynx Discover ActiveX - Mechanisms of ActiveX Interaction; Server Activation

Teklynx Discover ActiveX
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Chapter 1 -- 4
Programmer’s Guide
Mechanisms
Your labeling software offers you two main objects: the
Application object that is at the top of the hierarchy and the
Document object. These main objects provide access to the
subordinated objects (see Chapter 2 - 15: the hierarchy
diagram).
The first step to activate the server is the main object creation,
in this case, the Application object.
The last step is the deactivation of the server with the Quit
method.
Server Activation
SeveralmethodsareavailabletocreateanActiveXobject.
This function creates and returns a reference to the Application
object.
Syntax CreateObject(server name)
Defines an object variable. This object variable is meant to con-
tain the object reference. Dim as Object creates a link at exe-
cution.
Dim MyApp as Object
Set MyApp = CreateObject(”Lppx2.Application”)
This code launches the application that creates the object. In this
case, the labeling software. As soon as the object is created, you
reference it in the code with the object variable that you have
defined, i.e. MyApp.
Note
If you define an object variable with “As Object”, a variable
containing a reference for any object type is created. However,
the access to an object via this variable is realized by a late
bind, i.e. the link is created during the execution of your pro-
gram. To create an object v ariable that induces an early bind,
i.e. a link during the compilation of your program, define the
object variable with a specific identifier (see below).
Create Object
function

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