vb.net รบกวนช่วยดู เออเร่อหน่อยครับ ( Incorrect syntax near '='. )

Public Function searchTool(ByVal txtPm As String) As DataTable
        Dim objCommand As SqlCommand
        Dim resultDt As DataTable = New DataTable
        Dim objReader As SqlDataReader
        Dim strSql As String

        strSql = "select itemnum,description from tbl_inventory where"
        strSql &= "itemnum = '" & txtPm & "'"

        objCommand = New SqlCommand(strSql, objConn)
        objReader = objCommand.ExecuteReader()
        resultDt.Load(objReader)

        Return resultDt
    End Function