Sub ClearCmdButton_Click ()
'clear out text and list boxes
  Text1.Text = ""
  List1.Clear

End Sub

Sub Command1_Click ()
  LBhWnd% = List1.hWnd  'handle of list box
  TBhWnd% = Text1.hWnd  'handle of text box
  VBFhWnd% = Form1.hWnd 'handle of VB form

  MsgBox "Call Fortran DLL", 64, "Visual Basic"

  Call TESTMSG(LBhWnd%, TBhWnd%, VBFhWnd%) 'call the fortran dll,
                                           'with 3 handles
  MsgBox "All done!", 16, "Visual Basic"

End Sub


Sub OKCmdButton_Click ()
 'end program
 End

End Sub

Sub TestCmdButton_Click ()
'this button calls the fortran DLL

  ClearCmdButton.Enabled = False 'disable all
  OKCmdButton.Enabled = False    'buttons
  TestCmdButton.Enabled = False

  LBhandle% = List1.hWnd  'handle to list box
  TBhandle% = Text1.hWnd  'handle to text box
  VBFhandle% = Form1.hWnd 'handle to VB form

  Label3.Caption = " Program status: in Fortran DLL"

  'call Fortan DLL with handles of list,text boxes and VB form
  Call TESTMSG(LBhandle%, TBhandle%, VBFhandle%)
  Label3.Caption = " Program status: in VB program"
  MsgBox "Done!", 16, "VB 3.0"

  TestCmdButton.Enabled = True  'enable all
  ClearCmdButton.Enabled = True 'buttons
  OKCmdButton.Enabled = True
  

End Sub