OPC Studio User's Guide and Reference
CustomReference Property (_NotifyingWidget)



OpcLabs.BaseLib Assembly > OpcLabs.BaseLib.Widgets.ComTypes Namespace > _NotifyingWidget Interface : CustomReference Property
Can be used to distinguish otherwise equal widgets.
Syntax
'Declaration
 
<NotNullAttribute()>
Property CustomReference As String
'Usage
 
Dim instance As _NotifyingWidget
Dim value As String
 
instance.CustomReference = value
 
value = instance.CustomReference
[NotNull()]
string CustomReference {get; set;}
[NotNull()]
property String^ CustomReference {
   String^ get();
   void set (    String^ value);
}

Property Value

This value of this property can be null (Nothing in Visual Basic).

The value of this property cannot be null (Nothing in Visual Basic).

The default value of this property is "" (String.Empty).

Exceptions
ExceptionDescription

A null reference (Nothing in Visual Basic) is passed to a method that does not accept it as a valid argument.

This is a usage error, i.e. it will never occur (the exception will not be thrown) in a correctly written program. Your code should not catch this exception.

Remarks

This member or type is for use from COM. It is not meant to be used from .NET or Python. Refer to the corresponding .NET member or type instead, if you are developing in .NET or Python.

Requirements

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2016, Windows Server 2022; .NET: Linux, macOS, Microsoft Windows

See Also