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Important This document may not represent best practices for current development, links to downloads and other resources may no longer be valid. Current recommended version can be found here.

UCase Function (Visual Basic) 

Returns a string or character containing the specified string converted to uppercase.

Public Shared Function UCase(ByVal Value As Char) As Char
' -or-
Public Shared Function UCase(ByVal Value As String) As String



Required. Any valid String or Char expression.

Only lowercase letters are converted to uppercase; all uppercase letters and nonletter characters remain unchanged.

This function uses the application's culture information when manipulating the string so that the case changes are appropriate for the locale in which the application is being used.

Security noteSecurity Note

If your application makes security decisions based on the result of a comparison or case-change operation, then the operation should use the System.String.Compare(System.String,System.String,System.StringComparison) method, and pass Ordinal or OrdinalIgnoreCase for the comparisonType argument. For more information, see How Culture Affects Strings in Visual Basic.

This example uses the UCase function to return an uppercase version of a string.

' String to convert.
Dim LowerCase As String = "Hello World 1234"
' Returns "HELLO WORLD 1234".
Dim UpperCase As String = UCase(LowerCase)

Namespace: Microsoft.VisualBasic

Module: Strings

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

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