Visual Basic

set & retrive data from an image

10-Apr-05 11:26

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vbcon/html/vbtskhandlingerrorswithwindowsformsdatagridcontrol.asp

gopi_nkrishna10-Apr-05 5:27

gopi_nkrishna

10-Apr-05 5:27

hi all i am doing a project in steganography
for this i need to set & retrive data (a string) to an image
plz can anyone help me with this
i would be thankful to them

Re: set & retrive data from an image

Anonymous10-Apr-05 6:01

10-Apr-05 6:01

http://www.codeproject.com/csharp/steganodotnet.asp

Steganography - Hiding messages in the Noise of a Picture
By Corinna John

http://www.codeproject.com/script/profile/whos_who.asp?id=475133

sendkeys.send("{BS}")

vertig073010-Apr-05 2:21

vertig0730

10-Apr-05 2:21

I want to send this to a textbox but when i put it in a button_click It doesnt work. I need to link it to the textbox but i cant fingure it out.

James Kennelly

Dave Kreskowiak10-Apr-05 4:15

10-Apr-05 4:15

You must give the focus to the control you want to send the keystrokes to. Using this method isn't recommended because it's not a completely reliable way to send keystrokes.

In order for it to work, you must give the application/control the focus, then send the keystrokes. But, in a multitasking environment like Windows, the focus can move from control to control and application to application at any time. This includes the time between when you set the focus and the time you send the keystrokes, even if SendKeys is the very next statement!

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

vertig073010-Apr-05 12:41

vertig0730

10-Apr-05 12:41

well ginving the text box focus works i only need it for a second. But it wipes out the entire contents of the textbox because of the focus it selects all.
so had to play a game and came up with

TextBox1.Focus()
SendKeys.Send("{right}")
SendKeys.Send("{backspace}")

works so I like it!

James Kennelly

Dave Kreskowiak10-Apr-05 15:10

10-Apr-05 15:10

vertig0730 wrote:
well ginving the text box focus works i only need it for a second.

That's what I thought too... until it hit production! Out of 15,000 machines, some are garanteed to find that little second and mess it up for you.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Re: VB.NET and Outlook Addin

vertig073010-Apr-05 15:33

vertig0730

10-Apr-05 15:33

good news I am only intstalling it on 1 machine so i like the odds.

James Kennelly

VB.NET and Outlook Addin

JSNAGI9-Apr-05 18:29

JSNAGI

9-Apr-05 18:29

I am writing this in VB.NET and testing it against Outlook 2003.

I have successfully added a new Menubar "myMenu"........ now I need to add 3 drop down options to it. "Option 1", "Option 2" and "Option 3". And I should be able to get to the click events for all the 3 options.

When I click "Option 1", it launches internet explorer (for example). Like I said, I am having a hard time trying to figure out how to add drop downs to the "myMenu" option that I added on the "Menu Bar".

Any and all help will be greatly appreciated!

Anonymous10-Apr-05 6:21

Object reference not set to an instance of an object

10-Apr-05 6:21

http://www.codeproject.com/csharp/commandbars.asp

Adding CommandBars to Outlook 2003 using C#
By Hannes Pavelka

KAND1239-Apr-05 3:14

KAND123

9-Apr-05 3:14

In my code i have called a DLL which exports C++ functions which help me to read and retrieve data from different shapefiles(shapefile is a fileformat to store
non-topological geographic data)

The functions are in a while loop and the values got from the passed parameter are then stored in the sql database in ntext format(CLOBS).

Now this code works most for most ofshapefiles except a few shapfiles.

I get the following error:
An unhandled exception of type 'System.NullReferenceException'
occurred in final GUI.exe

Additional information: Object reference not set to an instance of an object.

I know what the error means but as it doesnt come for all the shapefile inputs i am unable to debug.

here's is my code:

While j < nver
Call vertice(i, j, k, start, x, y, nam)

strSQL = "Declare @ptr varbinary(16)" _
& "select @ptr =textptr(startpart) from " & nam & " where rec_no=" & i _
& "updatetext " & nam & ".startpart @ptr " & cnt0 & " 0 '" & ss & "'"

oCmd = New SqlClient.SqlCommand
With oCmd
.Connection = New SqlClient.SqlConnection(strConn)
.Connection.Open()
.CommandText = strSQL
oDR = .ExecuteReader()
End With

oDR.Close()
oCmd.Connection.Close()

j = j + 1

End While

Thanking in advansed.

PLEASE HELP

Re: Object reference not set to an instance of an object

Dave Kreskowiak9-Apr-05 5:20

running exe after installation

9-Apr-05 5:20

You haven't posted enough code to diagnose the error. What line does the exception occur? What objects does that line deal with? I bet you trying to use an object that you think is instantiated, but in fact, is not because of some failure above the line that threw the exception.

For example, what if your .ExecuteReader() method call succeeded, but the SQL it ran didn't return anything? Your code might be assuming that it returned valid data, but never checked it to be sure.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Rizwan Bashir9-Apr-05 2:01

Rizwan Bashir

9-Apr-05 2:01

Hello there
I have build a project and with the help of vb.net Setup builder. I have built one setup. Now what I need is to run the Exe File after completing the installation as All other software do.

Can Any one guide me how to launch the Exe from setup wizard.

Best Regards
Rizwan Bashir

Dave Kreskowiak9-Apr-05 5:13

9-Apr-05 5:13

Since the .MSI setup project that comes with Visual Studio is a bare-bones, simplistic version, you'll either have to write a custom action that will launch the application or I highly recommend getting a more professional level packager like Wise for Windows Installer.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Rizwan Bashir10-Apr-05 0:48

Rizwan Bashir

10-Apr-05 0:48

Can you please suggest any installer for building the setup ?

thanks for the support

Best Regards

Colin Angus Mackay10-Apr-05 1:52

Colin Angus Mackay

10-Apr-05 1:52

Rizwan Bashir wrote:
Can you please suggest any installer for building the setup ?

If you read Dave's reply you will see that he did suggest an installer for building the setup. If you were hoping for a link try this: http://www.wise.com[^]

My: Blog | Photos | Next SQL Presentation
WDevs.com - Open Source Code Hosting, Blogs, FTP, Mail and More

Anonymous9-Apr-05 6:23

Re: Packet Siffer in VB.NET

9-Apr-05 6:23

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vsintro7/html/vxwlkwalkthroughcreatingcustomaction.asp

http://www.vbcity.com/forums/topic.asp?tid=83928
http://www.vbcity.com/forums/topic.asp?tid=86291

Packet Siffer in VB.NET

Abhishek Tiwari8-Apr-05 21:26

Abhishek Tiwari

8-Apr-05 21:26

hi,
I am working on a project related to packet sniffer in JAVA. afer a lot of research I found that this is not possible in java. Java simply does not provide such low level facilities.

A developer suggested me of developing it in some other language and then passing the info to a java socket wherefrom I ca read the contents.

Another suggestion was to use some proxy to divert port 80 traffic to some other port and then read info from there.

I have found nothing on the latter. can someone help me with how to build a sniffer in VB.NET to be run as a background thread which can pass values to java.

I am running out of time as the deadline is approaching.

Please help me out.

Abhishek

Dave Kreskowiak9-Apr-05 5:09