QuickOPC User's Guide and Reference
IsValidInVariant Method



OpcLabs.BaseLib Assembly > OpcLabs.BaseLib.ComInterop Namespace > VarTypeUtilities Class : IsValidInVariant Method
A VarType to be tested.
Determines whether the given VarType can be used in a Variant.
Syntax
'Declaration
 
<PureAttribute()>
Public Shared Function IsValidInVariant( _
   ByVal varType As VarType _
) As Boolean
'Usage
 
Dim varType As VarType
Dim value As Boolean
 
value = VarTypeUtilities.IsValidInVariant(varType)
[Pure()]
public static bool IsValidInVariant( 
   VarType varType
)
[Pure()]
public:
static bool IsValidInVariant( 
   VarType^ varType
) 

Parameters

varType
A VarType to be tested.

Return Value

true if the VarType can be used in a Variant; false otherwise.
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.

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