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I have written a program that requires a password to be created when it is first run, this is then encrypted and stored on the computer C:/Test.txt. the next time the program is run you enter your password, which is encrypted and compared against the encrypted password on file, and if they match you can use the program.
I don't think storing the encrypted password as C:/Test.txt is a good thing, so where is the best place to hide it away, and how is it done?
Any help, advice or interesting articles will be welcome.
A Clever Man Knows the Answers,
A Wise Man Knows Where to Find Them.
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yea , like your subject says .go for the registry.You can put it HKEY_LoCALMACHINE\softwares\[software name]\pass
but this is the most obvious place some1 will have it stored.So i suggest having your encryption really strong because there is no place you can acutally "hid" your password.. there are crackers that can dissamble the program and fine out.
but hey i have got one really good sugesstion.. try using these API ->
<br />
Public Declare Function WriteProfileSection Lib "kernel32" Alias "WriteProfileSectionA" (ByVal lpAppName As String, ByVal lpString As String) As Long<br />
Public Declare Function WriteProfileString Lib "kernel32" Alias "WriteProfileStringA" (ByVal lpszSection As String, ByVal lpszKeyName As String, ByVal lpszString As String) As Long
they write stuff in .ini format into WIN.INI.I' bet very very few would guess u have it there.Also u should;nt have names that correspond to your app. So even if some one checks the win.ini file thy should NOT see ur app name or something thats on ur app in there!
good luck
Gideon
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hi all...
i have a questions about VB.NET. actually, i'm the newbie in VB.NET. i a bit confuse about accesing the web that we create.
Question
1. can we access the web that we just created in the internet??
2. if yes, can everyone access the web that i've create??
3. i dont understand about how to get the 'server name' to make the
project. actually i've read about creating an XML Web service client
Project that about ASP.NET Web Aplication. i've confuse about the
address of the web server?? actually the default the project server is
"http://localhost". so what actually happen if i just use "http://localhost"?
can everyone access my web???
can someon plese me solve this problem...
i hope to hear from u all soon..
thanks..
areon25
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areon25 wrote: 1. can we access the web that we just created in the internet??
That depends on what you mean by "access the web". But, generally, yes, VB.NET can get the any publicly available website as well as create them using ASP.NET technology.
areon25 wrote: 2. if yes, can everyone access the web that i've create??
Of course! So long as the website is publicly visible on the Internet. There are MANY hosting companies that support ASP.NET applications.
areon25 wrote: 3. i dont understand about how to get the 'server name' to make the
project. actually i've read about
OK. You've got some homework to do. Especially in how the Internet and web servers work, along with general IP networking.
The webserver address specifies the location of the IIS server that your going to develop your ASP.NET project on. It is HIGHLY recommended that you develop your site on an IIS server on your own network, then transfer the completed site to a hosting server.
Can anyone on the Internet see your website? Only if the machine that is hosting the site is visible on the Internet. Generally, this answer is no, unless you properly configure your network and machines and have them patched up and properly secured.
If you're asking these kinds of questions, I would HIGHLY suggest you DON'T do this. There are many security concerns with opening up your private network to the real world. You'll probably have your network attacked within hours and risk having your machines turned into zombies, if not wrecked, spamming the rest of the world for you.
Dave Kreskowiak
Microsoft MVP - Visual Basic
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Hi all,
Seeing as there's no MS Office board, I thought I might try here.
Basically what I want to do is during setup is to check that all components of Microsoft Office have been installed and if not, launch Windows Installer to install the rest of the components. Doing this during setup is not a problem for me, it's just the checking of components of Microsoft Office that's the real difficulty.
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Don't know if it's any use but have you had a look at HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\{Version}\{Application}? I can't tell what's in here since I always install everything. But under each {Application} node there is an InstallRoot key.
The Welsh will always support two teams: The Welsh, and anyone playing England 
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As far as I can tell, the Install Root key only contains the path to which Microsoft Office was installed. Any other ideas?
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That would be correct because if you look in that directory you'll see that Word, Excel, Access, InfoPath etc are all installed there. A possibility would be to use this registry key to get the root path. Then check for the existance of:
winword.exe = Word
excel.exe = Excel
msaccess.exe = Access
infopath.exe = InfoPath
ois.exe = Picture Manager
etc etc
Any use? If the exe doesn't exist then presumably the application doesn't exist.
The Welsh will always support two teams: The Welsh, and anyone playing England
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Just checking that Word, Excel and that lot is installed isn't quite what I want to do. If you go into Add/Remove programs can click Change on MS Office and then select add or remove components, you can see a listing of all the sub-components (ie. .NET programability support in Office 2003, or Mail Merge templates). Basically I want to check that all of this is installed during my programs installation.
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I want VB.Net 2005 to pause for x amount of seconds then continue on. I've tried the System.Threading.Thread.Sleep(xxxx) method and that sort of works. If I have multiple threads in there it seems to pause the combine time of the Sleep method & only execute the last line.
For example:
<br />
Label6.Text = "On!!!"<br />
System.Threading.Thread.Sleep(3000)<br />
Label6.Text = "Off!!!"<br />
System.Threading.Thread.Sleep(3000)<br />
Label6.Text = "Something else!!!"<br />
only nets me "Something else!!!" 6 seconds later.  There has to be a clean way to do this.
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You'll probably need to call Application.DoEvents to give the UI a chance to refresh before you suspend it's thread.
The Welsh will always support two teams: The Welsh, and anyone playing England
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Yup, that did it!!
Thanks much, Ed!!
 
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How do I establish connection to a worksheet in excel and convert the worksheet to a table in access2000 database using the VB 6.0
Fikunmi Feyijin
Hicad Systems
Nigeria
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There is a COM library for accessing Word, Excel, Access databases etc. Just add a reference or component or what-ever it's called in VB6 and it should be pretty obvious from there on (sorry havn't used VB6 for 2 years or so but I do remember playing around with it).
The Welsh will always support two teams: The Welsh, and anyone playing England 
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I am trying to write a piece of code that spawns a window when the user presses both mouse buttons simultaneously.
I have been thinking the only way to do this would be to have two mouse hooks, watching for left and right clicks respectively, and checking the time difference between clicks. It would then cancel the message if the time is within a certain interval, and show the window.
Any better ideas? Please?
All your source are belong to us!
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The easiest way would be to handle the click event and check the state of the buttons inside the event. The following will close the form if both buttons are depressed:
Private Sub Form1_MouseClick(ByVal sender As Object, ByVal e _<br />
As System.Windows.Forms.MouseEventArgs) Handles Me.MouseClick<br />
If e.Button = Windows.Forms.MouseButtons.Left Then<br />
If MouseButtons = Windows.Forms.MouseButtons.Right Then<br />
Me.Close()<br />
End If<br />
End If<br />
If e.Button = Windows.Forms.MouseButtons.Right Then<br />
If MouseButtons = Windows.Forms.MouseButtons.Left Then<br />
Me.Close()<br />
End If<br />
End If<br />
End Sub<br />
Hope this helps.
Keith
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There would be no form present when watching for mouse clicks. This is why I have suggested using a mouse hook.
All your source are belong to us!
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I have a form that has ftp information entered and the program connected to the website. The next time a user starts the program, I want that info to be in a pull down for them to select. Eventully, the pulldown will have several websites ftp info stored in them. I was thinking of storing the info in an xml file but I realize this is not very secure. Is there a better way to store this information.
Almerica
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Just encrypt the sensitive data. The only problem then is encrypting the encryption keys, and encrypting the encrypted encryption keys......
It's all a balance of how much security you need but the .NET Framework's System.Security.Cryptography namespace will help you out, there are assymetric and symmetric algorithms there including RSA and TripleDES.
The Welsh will always support two teams: The Welsh, and anyone playing England
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Hi there.
You can either save the information in the registry or in a XML file, but you should incript the data to make in more secure. There is DLL's and source code available to encode and decode data. For example CryptoAPI.cls. This is a VB6 based class module that I use to encrypt data.
Hope this will help you in some way.
A programmer's life is good... or is it?? Ek dink nie so nie!
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I am wondering what is an xml editor and if an application provide that, what can you do with it?
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its edits xml files duh!! lol .. well u have to look up what xml is first.If u know xml(i doubt it) , an xml editor smartly allows u to edit xml files.For eg.
if u have this piece of xml in an xml file
<question status="answered"> What is XML?</question>
normally u could just edit it in notepad , but an xml edit would allow u to 'smartly' edit the file as in it would be able to change the value of status or the node value etc,, if what i'm sayin is bouncing of your head i really suggest reading something on what xml is.And its really helpful nowadays , a lot of things are based on XML.
Gideon
-- modified at 2:44 Sunday 16th July, 2006
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hey sorry but i did'nt know that xml example was'nt going to show up! the html parser took it off.So i modified the above message. 
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Hi
The first set of source code is the class for a combobox in a grid,
hopefully. In the second set of code we try to use the combobox class, but
the grid is empty.
I don't understand how this works. The first set of code I downloaded from
internet and when i tried it, it worked fine. But when I changed the second
part of the code it started to give me trouble. Before I changed the code
they used Datacolumns,Datarows and Datatables and added them to the Dataset
which they used to the Datagrid and it worked fine. I don't understand what
is wrong know that I'm using a table I haven't "made" myself but a table I
got from a connection. As the third set of code showing, when using
comboboxes you can set the Datasource to a table you have connected to with
a connection and it works fine, so I think the second part of code should
work, but the grid is empty when the program starts.
If there is anyone who understand my problem and have a solution, please
give me an answer.
Thanks
Fia
'The MyComboColumn class
Imports System.Data
Imports System.Drawing
Imports System.Collections
Imports System.Windows.Forms
Namespace ComboBoxTest
Public Class MyComboColumn
Inherits System.Windows.Forms.DataGridTextBoxColumn
Private _cboColumn As ComboBox
Private _objSource As Object
Private _strMember As String
Private _strValue As String
Private _bIsComboBound As Boolean = False
Private _backBrush As Brush = Nothing
Private _foreBrush As Brush = Nothing
Private _iRowNum As Integer
Private _cmSource As CurrencyManager
Public Sub New(ByVal objSource As DataSet, ByVal strMember As String, ByVal
strValue As String, ByVal bUseDropDownList As Boolean)
'_objSource = objSource
_strMember = strMember
_strValue = strValue
_cboColumn = New ComboBox
_cboColumn.DataSource = objSource.Tables(0)
_cboColumn.DisplayMember = _strMember
_cboColumn.ValueMember = _strValue
If bUseDropDownList = True Then
_cboColumn.DropDownStyle = ComboBoxStyle.DropDownList
Me.ReadOnly = True
Else
'AddHandler _cboColumn.KeyPress, AddressOf _cboColumn_KeyPress
AddHandler _cboColumn.KeyUp, AddressOf _cboColumn_KeyUp
End If
AddHandler _cboColumn.Leave, AddressOf cboColumn_Leave
_cboColumn.Visible = False
End Sub
Private Sub _cboColumn_KeyPress(ByVal sender As Object, ByVal e As
KeyPressEventArgs)
e.Handled = True
End Sub
Private Shadows Sub _cboColumn_KeyUp(ByVal sender As Object, _
ByVal e As System.Windows.Forms.KeyEventArgs)
Dim index As Integer
Dim actual As String
Dim found As String
' Do nothing for certain keys such as navigation keys
If ((e.KeyCode = Keys.Back) Or _
(e.KeyCode = Keys.Left) Or _
(e.KeyCode = Keys.Right) Or _
(e.KeyCode = Keys.Up) Or _
(e.KeyCode = Keys.Delete) Or _
(e.KeyCode = Keys.Down) Or _
(e.KeyCode = Keys.PageUp) Or _
(e.KeyCode = Keys.PageDown) Or _
(e.KeyCode = Keys.Home) Or _
(e.KeyCode = Keys.ShiftKey) Or _
(e.KeyCode = Keys.End)) Then
Return
End If
' Store the actual text that has been typed
actual = _cboColumn.Text
' Find the first match for the typed value
index = _cboColumn.FindString(actual)
' Get the text of the first match
If (index > -1) Then
found = _cboColumn.Items(index).ToString()
' Select this item from the list
_cboColumn.SelectedIndex = index
' Select the portion of the text that was automatically
' added so further typing will replace it
_cboColumn.SelectionStart = actual.Length
_cboColumn.SelectionLength = found.Length
End If
End Sub
Protected Overloads Overrides Sub Edit(ByVal source As CurrencyManager,
ByVal rowNum As Integer, ByVal bounds As Rectangle, ByVal [ReadOnly] As
Boolean, ByVal instantText As String, ByVal cellIsVisible As Boolean)
If _bIsComboBound = False Then
_bIsComboBound = True
Me.DataGridTableStyle.DataGrid.Controls.Add(_cboColumn)
End If
_iRowNum = rowNum
_cmSource = source
_cboColumn.Font = Me.TextBox.Font
Dim anObj As Object = Me.GetColumnValueAtRow(source, rowNum)
_cboColumn.Bounds = bounds
_cboColumn.BeginUpdate()
_cboColumn.Visible = True
If Not (anObj.GetType Is System.DBNull.Value) Then
'TextObject Is System.DBNull.Value
_cboColumn.SelectedValue = anObj
Else
_cboColumn.SelectedIndex = 0
End If
_cboColumn.EndUpdate()
_cboColumn.Focus()
End Sub
Public Sub cboColumn_Leave(ByVal sender As Object, ByVal e As EventArgs)
Dim objValue As Object = _cboColumn.SelectedValue
If objValue Is Nothing Then
objValue = DBNull.Value
Else
Me.SetColumnValueAtRow(_cmSource, _iRowNum, objValue)
End If
_cboColumn.Visible = False
End Sub
Protected Overloads Overrides Sub Paint(ByVal g As Graphics, ByVal bounds As
Rectangle, ByVal source As CurrencyManager, ByVal rowNum As Integer, ByVal
backBrush As Brush, ByVal foreBrush As Brush, ByVal alignToRight As Boolean)
Dim strCountry As String = "Huh?"
Dim aRowA As DataRow()
Dim anObj As Object = Me.GetColumnValueAtRow(source, rowNum)
Dim aType As Type = anObj.GetType
If Not (aType.GetType Is System.DBNull.Value) Then
aRowA = CType(_objSource, DataTable).Select(_strValue + " = " +
anObj.ToString)
Else
aRowA = CType(_objSource, DataTable).Select
End If
If aRowA.Length > 0 Then
strCountry = aRowA(0)(_strMember).ToString
End If
Dim rect As Rectangle = bounds
Dim rectF As RectangleF = rectF.op_Implicit(rect) ' Convert to
If Me._backBrush Is Nothing Then
g.FillRectangle(backBrush, rect)
Else
g.FillRectangle(_backBrush, rect)
End If
rect.Y += 2
If Me._foreBrush Is Nothing Then
'g.DrawString(Text, Me.DataGridTableStyle.DataGrid.Font, ForeBrush, RectF,
Format)
g.DrawString(strCountry, Me.TextBox.Font, foreBrush, rectF)
Else
g.DrawString(strCountry, Me.TextBox.Font, _foreBrush, rectF)
End If
End Sub
Public WriteOnly Property backgroundColour() As System.Drawing.Color
Set(ByVal Value As System.Drawing.Color)
If Value.Equals(System.Drawing.Color.Transparent) Then
Me._backBrush = Nothing
Else
Me._backBrush = New SolidBrush(Value)
End If
End Set
End Property
Public WriteOnly Property foregroundColour() As System.Drawing.Color
Set(ByVal Value As System.Drawing.Color)
If Value.Equals(System.Drawing.Color.Transparent) Then
Me._foreBrush = Nothing
Else
Me._foreBrush = New SolidBrush(Value)
End If
End Set
End Property
End Class
End Namespace
----------------------------------------------------------------------------
----------------------------------------------------------------------------
------------------------------------
'The Form's class
Imports System
Imports System.Data
Imports System.Data.SqlClient
Imports System.Drawing
Imports System.ComponentModel
Imports System.Windows.Forms
Imports ReceptNet.ComboBoxTest
Public Class DataGridSample
Inherits Form
Private ds As DataSet
Private myGrid As DataGrid
Shared Sub Main()
Application.Run(New DataGridSample)
End Sub
Private Sub ConnectToData()
Dim AppPath As String = Replace(Replace(Application.ExecutablePath,
Application.ProductName + ".exe", ""), Application.ProductName + ".exe", "")
& "Recept.mdb"
Dim cString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" &
AppPath
Dim cn As System.Data.OleDb.OleDbConnection = New
System.Data.OleDb.OleDbConnection(cString)
Dim adpTables As System.Data.OleDb.OleDbDataAdapter = New
System.Data.OleDb.OleDbDataAdapter
adpTables.TableMappings.Add("Table", "Kött")
cn.Open()
Dim cmdTable As OleDb.OleDbCommand = New OleDb.OleDbCommand("SELECT * FROM
Kryddor", cn)
cmdTable.CommandType = CommandType.Text
adpTables.SelectCommand = cmdTable
ds = New DataSet("Customers")
adpTables.Fill(ds)
cn.Close()
Dim GridTableStyle As DataGridTableStyle = New DataGridTableStyle
GridTableStyle.MappingName = "Kött"
Me.myGrid.TableStyles.Add(GridTableStyle)
AddStyle(myGrid,ds)
End Sub
Private Sub AddStyle(ByVal grdSrc As DataGrid, ByVal dataS As DataSet)
Dim aCboCol As MyComboColumn = New MyComboColumn(dataS, "KöttID", "", False)
aCboCol.Width = 129
aCboCol.MappingName = "KöttID"
aCboCol.HeaderText = "Kött"
myGrid.TableStyles("Kött").GridColumnStyles.Add(aCboCol)
End Sub
Private Sub DataGridSample_Load(ByVal sender As Object, ByVal e As
System.EventArgs) Handles MyBase.Load
ConnectToData()
End Sub
End Class
----------------------------------------------------------------------------
----------------------------------------------------------------------------
------------------------------------
Me.cboDatum.DataSource = ds.Tables(1)
cboDatum.DisplayMember = "KöttID"
cboDatum.ValueMember = ""
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How can use DataGrid .... so that i would like to fill it from database after that i would like to change the values of it then i would like to view report with new data that i filled from DataGrid.
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