QuickOPC User's Guide and Reference
FindVarType Method



OpcLabs.BaseLib Assembly > OpcLabs.BaseLib.ComInterop Namespace > VarTypeUtilities Class : FindVarType Method
The System.Type for which the corresponding OLE Automation type should be determined.
The resulting VarType. If it cannot be specifically determined, a null is returned.
Determines an OLE automation VarType that corresponds to a given CLR (.NET) System.Type.
Syntax
'Declaration
 
Public Shared Function FindVarType( _
   ByVal type As Type, _
   ByRef varType As VarType _
) As Boolean
'Usage
 
Dim type As Type
Dim varType As VarType
Dim value As Boolean
 
value = VarTypeUtilities.FindVarType(type, varType)
public static bool FindVarType( 
   Type type,
   out VarType varType
)
public:
static bool FindVarType( 
   Type^ type,
   [Out] VarType^ varType
) 

Parameters

type
The System.Type for which the corresponding OLE Automation type should be determined.
varType
The resulting VarType. If it cannot be specifically determined, a null is returned.

Return Value

Returns true if the corresponding OLE automation type has been successfully determined; return 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