Run a LabVIEW VI from VB without compiling

Question

I've got a couple of LabVIEW VI's that I want to run from VB without having to compile them.  I can run them fine on the development machine using:
    CreateObject("LabVIEW.Application")
When I try this command on another machine that has the LV Runtime Engine installed it returns a run-time error "429: ActiveX component can't create component"
I've read a few posts with similar problems however they don't seem to provide any real solutions.
All tips/help are greatly welcome.
Woody

Answer 1

Hey Woody,
this is an extract from a example of a VB app using LV VIs.
    'Create a reference to LabVIEW
    Set lvApp = CreateObject("ETLKWP.Application")
    'Assign an object reference to VI
    Set VI_open = lvApp.GetVIReference("ETLKWPOpenCommunication.vi")
    Set VI_close = lvApp.GetVIReference("ETLKWPCloseCommunication.vi")
    Set VI_DeviceType = lvApp.GetVIReference("ETLKWPDeviceType.vi")
This code will load the application, here ETLKWP, and three VIs. These VIs will be found by the app on the VI search path. Since one part of the search path is "all subfolders" you can place them in any subfolder of the folder where your app is.
Private Sub DeviceType_Click()
  Dim ParamNames(0 To 8) As String
  Dim ParamVals(0 To 8) As Variant
   ParamNames(0) = "PrimTarget"
   ParamNames(1) = "PrimIndex"
   ParamNames(2) = "Source"
   ParamNames(3) = "DeviceType"
   ParamNames(4) = "DeviceIndex"
   ParamNames(5) = "Syyy"
   ParamNames(6) = "Hyyy"
   ParamNames(7) = "SerialID"
   ParamNames(8) = "ErrorNumber"
   ParamVals(0) = PrimTarget
   ParamVals(1) = PrimIndex
   ParamVals(2) = 0
   ParamVals(3) = 81
   ParamVals(4) = 1
   Call VI_DeviceType.Call(ParamNames, ParamVals)
   SW_Stand = ParamVals(5)
   HW_Stand = ParamVals(6)
   Serienid = ParamVals(7)
End Sub
This part of code will call the VI DeviceType.vi. The parameters 0 - 4 are controls and 5 - 8 are indicators which are connected with the connector pane. This VI will send a message over a serial connection to an external device and the device will answer with its firmware, hardware and serial information. This information is now available in the VB program.
Waldemar
Using 7.1.1, 8.5.1, 8.6.1, 2009 on XP and RT
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