Check Item Exists on Form through SDK

Dear All,
   Today , We will see, How to Check Item Exists on Form through SDK

Public Function IsCheckItemExists(ByVal aForm As SAPbouiCOM.Form, ByVal aItemUId As String) As Boolean
        Dim oItem As SAPbouiCOM.Item = Nothing
        Dim blnResult As Boolean = False
        Try
            oItem = aForm.Items.Item(aItemUId)
            blnResult = True

        Catch ex As Exception
            blnResult = False
        Finally
            If oItem IsNot Nothing Then
                oItem = Nothing
            End If
        End Try

        Return blnResult
    End Function