OPC Studio User's Guide and Reference
FromVarTypes Method



OpcLabs.BaseLib Assembly > OpcLabs.BaseLib.ComInterop Namespace > VarType Class : FromVarTypes Method
Enumerated value to be converted.

Valid values of this parameter are in the range from 0 to 65535.

Converts an enumerated value to a VarType object.
Syntax
'Declaration
 
<NotNullAttribute()>
Public Shared Function FromVarTypes( _
   ByVal internalValue As VarTypes _
) As VarType
'Usage
 
Dim internalValue As VarTypes
Dim value As VarType
 
value = VarType.FromVarTypes(internalValue)
[NotNull()]
public static VarType FromVarTypes( 
   VarTypes internalValue
)
[NotNull()]
public:
static VarType^ FromVarTypes( 
   VarTypes internalValue
) 

Parameters

internalValue
Enumerated value to be converted.

Valid values of this parameter are in the range from 0 to 65535.

Return Value

Returns a VarType converted from the input argument.

Because there is an implicit conversion from VarType to System.Int32 and VarTypes, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use the return value in place of an integer (System.Int32) (representing the numerical value of the COM VARTYPE), or in place a VarTypes enumeration value. When the implicit conversion operators are not supported (such as with Python.NET), you can use the ToInt32 or ToVarTypes static method instead.

This method never returns null (Nothing in Visual Basic).

Remarks

In languages that support implicit conversions (such as C# or VB.NET), in many cases you do not have call this method explicitly. When indicated, a call to an available equivalent implicit conversion operator will be created by the compiler automatically.

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