the next line, type “LbapcActiveX.Open” without the quotation marks. This statement initiates communication between the LBA-PC ActiveX control and LBA-PC.
5.Respond to LBA-PC ActiveX events. . In the left list box, select LbapcActiveX. A new subroutine called LbapcActiveX_OnNewFrame() is created. This subroutine is called every time the LBA-PC collects a new frame of data.
An example Visual Basic project, LbapcActiveXExample.vbp, can be found in “ActiveX\Examples\Visual Basic” directory under the LBA-PC installation directory.
9.2.3LabVIEW
Follow these steps to use the LBA-PC ActiveX control in National Instruments LabVIEW:
1.Place an ActiveX reference on the Front Panel. On the Controls palette, select ActiveX, and then select Automation Refnum (you cannot use ActiveX Object). Place the control on the Front Panel.
2.Reference the LBA-PC ActiveX server. Right click on the Automation Refnum and select Select ActiveX Class, then select Browse… Expand the list box at the top then scroll down and select LbapcActiveX EXE. Click OK.
3.Display the Diagram window. On the Window menu, select Show Diagram.
4.Open a connect to the LBA-PC ActiveX server. On the Functions palette select Communications then select ActiveX then select Automation Open. Place this VI on the diagram. Connect a wire from LbapcX.ILbapcActiveX node to the input Automation Refnum terminal of the Automation Open VI. The output Automation Refnum terminal is the reference for all LBA-PC ActiveX server properties, methods, and events.
5.To access a LBA-PC ActiveX property, right click on the LbapcX.ILbapcActiveX node, select Create, select Property, and then select the desired property from the list. Connect a wire from the output Automation Refnum terminal to the reference terminal of the property node.
6.To call a LBA-PC ActiveX method, right click on the LbapcX.ILbapcActiveX node, select Create, select Method, and then select the desired property from the list. Connect a wire from the output Automation Refnum terminal to reference terminal of the method node.
7.See the Events section of this document, and the OnNew examples for information on how to use LBA-PC ActiveX events in LabVIEW.
Example VI’s are packaged in LbapcActiveX.llb, which can be found in the “ActiveX\Examples\LabVIEW” directory under the LBA-PC installation directory. The LabView examples were developed and tested using LabVIEW Professional 6i. Please note, some of the example VI’s use advanced National Instruments VI’s that are not part of the base package. In order to use all of the example VI’s you must have the LabVIEW Full, Professional, or Developer Development System.
9.3 Properties, Methods, and Events
ActiveX components operate on the PME system, where PME is: | |
Properties | - Think of these as data items | |
Operator’s Manual | 160 | LBA-PC |
