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Help with VBA Code
28 Dec 2015 22:03 #3729
by cdunlap
Help with VBA Code was created by cdunlap
Hi,
I am having some trouble building off of one of the VBA Excel examples and I was hoping to get some input on it. This is not specifically related to a problem with the component itself, but more on why certain code works and certain code does not work. I am sure it's more of a lack of knowledge of VBA than anything else, but i was hoping that you could help
.
Basically, If I run the code in the UASubscribeToMultiple3.xls file, everything works great.
I have a customer that tried modifying the declaration of the MonitoredItemArguments to use the 'New' keyword as opposed to a call to CreateObject(). It will not allow anything to be assigned to the 'State' variable, and gives an error message, but I cannot figure out why.
So the original code looks like this:
The slightly altered code looks like this:
The altered code gives back an error on the line that tries to assign a value to the 'State' object that says "Run-time error '424': Object required".
From everything that I can find, it sounds like CreateObject and New are somewhat interchangeable, but that doesn't seem to be the case here.
So basically, I am stumped as to why CreateObject works, but defining it with the 'New' keyword does not. I know that this is more of a VBA question than a specific question about this component, but I was hoping I could get some insight.
Thank you in advance for the help
I am having some trouble building off of one of the VBA Excel examples and I was hoping to get some input on it. This is not specifically related to a problem with the component itself, but more on why certain code works and certain code does not work. I am sure it's more of a lack of knowledge of VBA than anything else, but i was hoping that you could help
.Basically, If I run the code in the UASubscribeToMultiple3.xls file, everything works great.
I have a customer that tried modifying the declaration of the MonitoredItemArguments to use the 'New' keyword as opposed to a call to CreateObject(). It will not allow anything to be assigned to the 'State' variable, and gives an error message, but I cannot figure out why.
So the original code looks like this:
Dim MonitoredItemArguments1: Set MonitoredItemArguments1 = CreateObject("OpcLabs.EasyOpc.UA.OperationModel.EasyUAMonitoredItemArguments")
MonitoredItemArguments1.EndpointDescriptor.UrlString = "http://opcua.demo-this.com:51211/UA/SampleServer"
MonitoredItemArguments1.NodeDescriptor.NodeId.ExpandedText = "nsu=http://test.org/UA/Data/;i=10845"
Set MonitoredItemArguments1.MonitoringParameters = MonitoringParameters
MonitoredItemArguments1.State = "D2"The slightly altered code looks like this:
Dim MonitoredItemArguments1 As EasyUAMonitoredItemArguments
Set MonitoredItemArguments1 = New EasyUAMonitoredItemArguments
Dim Endpoint As String
Dim Node As String
Dim CellName As String
Endpoint = "http://opcua.demo-this.com:51211/UA/SampleServer"
Node = "nsu=http://test.org/UA/Data/;i=10845"
CellName = "D2"
MonitoredItemArguments1.EndpointDescriptor.UrlString = Endpoint
MonitoredItemArguments1.NodeDescriptor.NodeId.ExpandedText = Node
Set MonitoredItemArguments1.MonitoringParameters = MonitoringParameters
' Below is where it fails. ************************************************
MonitoredItemArguments1.State = CellName ' Gives Runtime error 424: object required
' MonitoredItemArguments1.State ="D2" doesn't work either
' *************************************************************************The altered code gives back an error on the line that tries to assign a value to the 'State' object that says "Run-time error '424': Object required".
From everything that I can find, it sounds like CreateObject and New are somewhat interchangeable, but that doesn't seem to be the case here.
So basically, I am stumped as to why CreateObject works, but defining it with the 'New' keyword does not. I know that this is more of a VBA question than a specific question about this component, but I was hoping I could get some insight.
Thank you in advance for the help
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