diff --git a/GUIs.ZooFlow/frmtest.vb b/GUIs.ZooFlow/frmtest.vb
index a693dd87..aaf6586e 100644
--- a/GUIs.ZooFlow/frmtest.vb
+++ b/GUIs.ZooFlow/frmtest.vb
@@ -20,33 +20,34 @@ Public Class frmtest
 
     Private Async Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click
         Try
-            Dim oResult As Boolean
-            Dim oStream As New FileStream(txtFile2Import.Text, FileMode.Open)
-            Dim oContents(oStream.Length) As Byte
-            'Dim oBytesRead = Await oStream.ReadAsync(oContents, 0, oStream.Length)
+            Dim oResult As Boolean = False
+
+            Using oStream As New FileStream(txtFile2Import.Text, FileMode.Open, FileAccess.Read)
+                Dim oContents(oStream.Length) As Byte
+                oStream.Read(oContents, 0, oStream.Length)
+
+                oResult = Await _Client.ImportIDBFOAsync(oContents, My.Application.User.UserName, txtIDB_OBJ_ID.Text, 1, txtIDBFOPath.Text)
+            End Using
 
-            oResult = Await _Client.ImportIDBFOAsync(oContents, My.Application.User.UserName, txtIDB_OBJ_ID.Text, 1, txtIDBFOPath.Text)
             If oResult = False Then
                 MsgBox("Oh no error", MsgBoxStyle.Critical)
             Else
                 MsgBox("#Nailedit")
-
             End If
         Catch ex As Exception
             MsgBox(ex.Message)
         End Try
-
     End Sub
 
     Private Sub Button4_Click(sender As Object, e As EventArgs) Handles Button4.Click
         Dim memString As String = "Memory test string !!!"
+        Dim buffer As Byte() = Encoding.UTF8.GetBytes(memString)
+
         ' convert string to stream
-        Dim buffer As Byte() = Encoding.ASCII.GetBytes(memString)
-        Dim ms As New MemoryStream(buffer)
-        'write to file
-        Dim file As New FileStream("d:\file.txt", FileMode.Create, FileAccess.Write)
-        ms.WriteTo(file)
-        file.Close()
-        ms.Close()
+        Using oMemoryStream As New MemoryStream(buffer)
+            Using oFileStream As New FileStream("d:\file.txt", FileMode.Create, FileAccess.Write)
+                oMemoryStream.WriteTo(oFileStream)
+            End Using
+        End Using
     End Sub
 End Class
\ No newline at end of file