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VarType Function (Visual Basic)

Returns an Integer value that contains the data type classification of a variable.

Public Function VarType(ByVal VarName As Object) As VariantType

VarName

Required. Object variable. If Option Strict is Off, you can pass a variable of any data type except a structure.

The integer value returned by VarType is a member of the VariantType Enumeration.

The following table shows the values returned by VarType for special cases of VarName.

Data type represented by VarName

Value returned by VarType

Nothing (Visual Basic)

VariantType.Object

DBNull

VariantType.Null

Enumeration

Underlying data type (SByte, Byte, Short, UShort, Integer, UInteger, Long, or ULong)

Array

Bitwise OR of array element type and VariantType.Array

Array of arrays

Bitwise OR of VariantType.Object and VariantType.Array

Structure (System.ValueType)

VariantType.UserDefinedType

Exception

VariantType.Error

Unknown

VariantType.Object

The following example uses the VarType function to return data type classification information about several variables.

Dim testString As String = "String for testing" 
Dim testObject As New Object 
Dim testNumber, testArray(5) As Integer 
Dim testVarType As VariantType
testVarType = VarType(testVarType)
' Returns VariantType.Integer.
testVarType = VarType(testString)
' Returns VariantType.String.
testVarType = VarType(testObject)
' Returns VariantType.Object.
testVarType = VarType(testNumber)
' Returns VariantType.Integer.
testVarType = VarType(testArray)
' Returns the bitwise OR of VariantType.Array and VariantType.Integer.

This function is not supported.

Namespace: Microsoft.VisualBasic

Module: Information

Assembly: Visual Basic Runtime Library (in Microsoft.VisualBasic.dll)

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