Visual Basic Discussion Boards

harish13930-Jul-06 23:35

30-Jul-06 23:35

i have a decimal number ina variable i want to convert it into hexa decimal
and i want to assign it into a target varable the problem is my target variable can hold only one byte so i want to to assign this hex number in byte by byte
that is if a=&h0fe2
i want to assign b=&h0f
c=&he2

thank you in advance

Re: decimal to hex

Guffa31-Jul-06 0:46

Guffa

31-Jul-06 0:46

Decimal and hexadecimal are string representation of numbers. Are you really having a string representing the number, or are you just having a plain simple number?

I assume that you don't know what you are talking about Wink | ;)

, and that you have a 16 bit number, and want to split it into two 8 bit numbers (bytes):

a = &hfe2 ' the number 4066

b = a div 256 ' will contain the number 15, or &hf
c = a and 255 ' will contain the number 242, or &he2

---
b { font-weight: normal; }

How to add MaskedTextBox control to toolbox?

Prodigy20130-Jul-06 20:47

Prodigy201

30-Jul-06 20:47

Hi All !!

I am new to VB.NET.
I want to add MaskedTextBox control to form. But it has not been in the list of Components/Windows Form of toolbox. So how to add it in Toolbox??

I would appreciate responses for my query.

Thanks,
Manasi

Re: How to add MaskedTextBox control to toolbox?

TDSp31-Jul-06 1:00

TDSp

31-Jul-06 1:00

it should be under common controls. If i is not....

1) Right click on the header of the section
2) click choose items
3) check maskedtextbox

Thanks, Terence

Re: How to add MaskedTextBox control to toolbox?

Prodigy20131-Jul-06 1:28

Prodigy201

31-Jul-06 1:28

Hi !

Nice to receive the reply.. Smile | :)

But am sorry, am not getting the "common control" on windows form anywhere...moreover I right-clicked to Components under toolbox, and try to add components, but there is no checkbox for MaskedTExtBox control. Frown | :(

It would be great, if u guide me in details.

Thanks

Re: How to add MaskedTextBox control to toolbox?

TDSp31-Jul-06 3:03

TDSp

31-Jul-06 3:03

The Choose controls option[^]

The masked textbox control[^]

also what version visual basic are you using? maskedtextbxo is deffinatly in visual basic 2005, but i don't know about other versions

sorry if i was a bit abstract!

Thanks, Terence

Datagridview missing operand error [modified]

llebron30-Jul-06 16:54

llebron

30-Jul-06 16:54

I have a datagrid that displays a computer's filesystem. As the drive is recursed the directories and files are added to the datagrid. The problem is that when it tries to add a directory named "B's Clip" I get an error
"Missing operand after 's'...."

I tried escaping the quote with another quote
(i.e. "B''s Clip") and a backslash (i.e. "B\'s Clip"). Neither worked.

Any ideas on how I can fix this?

thanks,

Confused | :confused:

-- modified at 22:54 Sunday 30th July, 2006

Luis R. Lebron

Re: Datagridview missing operand error

Dave Sexton31-Jul-06 2:20

Dave Sexton

31-Jul-06 2:20

Try converting all drive names to string when doing the iteration, it seems like your method is evaluating the drive name as an expression.

Ms Access

hoho_d0dol30-Jul-06 9:00

hoho_d0dol

30-Jul-06 9:00

hi, what is the code for connecting VB.Net with Ms Access.? Anyone could help?? I'm really and very new into these things..

Sigh | :sigh:

thanx..

Re: Ms Access

Christian Graus30-Jul-06 12:42

Christian Graus

30-Jul-06 12:42

Search this site, or even google and there are tons of examples. If you're 'really new' then perhaps it's too soon to worry about databases, the world is filling with people who can make a pretty form in VB, and will never be programmers.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

Re: Ms Access

Paul Conrad30-Jul-06 15:43

Paul Conrad

30-Jul-06 15:43

Christian Graus wrote:
the world is filling with people who can make a pretty form in VB, and will never be programmers.

Very true

Re: Ms Access

Tyquaun Hunter31-Jul-06 5:19

Tyquaun Hunter

31-Jul-06 5:19

I am certainly not going to damper your spirits and tell you not to strive for what you want. Look under the system.data namespace in MSDN library. This is the namespace where you can do all kinds of data manipulations using databases. There is something called an oledb provider. There for it should be system.data.oledb This is the only way you can access the Microsoft access database engine.

You can use something like this
'OleDbConnection object used for connecting to a database
Private _ConnectionObj As New OleDbConnection()

'OleDbCommand object used for executing a command
Private _Command As OleDbCommand

_connectionObj.ConnectionString = [Shared].ConnectionString
_ConnectionObj.Open()
_Command = New OleDbCommand("Select * From Registrants", _ConnectionObj)

Where you see [Shared].ConnectionString, this is the string you should pass in

Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Visual Studio Projects\AnnualMeetingRegistration\Database\Registrants.mdb;User Id=admin;Password=;

Normally, you would want to store you connection string in the app.config file, but don't do that right now. Just use the string example I showed you. As you get more experienced, you will find better methodologies of programming.

Then you open the connection object and pass the connection object to the command object. After, you have finished close the connection object. If you decide to use a data reader you will have to close that as well.

Here is an excellent website for connection strings. http://www.connectionstrings.com/[^]

I hope this helps,

Tyquaun

message boxes in ASP .NET forms

ssbelfast30-Jul-06 8:55

ssbelfast

30-Jul-06 8:55

Can message boxes ( pop up boxes) be used within ASP.net forms?
The info I found visual studio says they are SYSTEM.OBJECTS , I tried inherits SYSTEM.OBJECTS but still get a not declared message
Is this something that can only be used in Windows forms? Is there something similar for ASP or VB classes?
Thanks

Re: message boxes in ASP .NET forms

mr_lasseter30-Jul-06 12:06

mr_lasseter

30-Jul-06 12:06

You will have to use javascript alert function.

Mike Lasseter

Re: message boxes in ASP .NET forms

ssbelfast31-Jul-06 4:41

ssbelfast

31-Jul-06 4:41

thanks

reading memory from proccess problem! [modified]

TDSp30-Jul-06 8:06

TDSp

30-Jul-06 8:06

hi,

First of all a screenshot

http://img131.imageshack.us/img131/5797/problemiovg8.png[^]

i am using the DLL from this artical (http://www.codeproject.com/csharp/minememoryreader.asp[^]) To read memory from a rollercoaster game, to get lateral and acceleration Gs, these values are in the form of a double.

in a memory scanner i have froze one of the values to "0.1" for testing purposes but when i read the memory address from VB.NET it reads it as "154153153153153153185630003217311321963" !!!

i am very confused about this, is there anyone here that has a clue?

also, does anyone know of other DLLs that can do the same job?

    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
        RichTextBox1.Clear()
        
' Choose process
Dim myProcesses As System.Diagnostics.Process() = 
System.Diagnostics.Process.GetProcessesByName("NoLimitsSimulator")

'Load it to memory reader
        mem.ReadProcess = myProcesses(0)

'open it
        mem.OpenProcess()

'decs
        Dim out As Int32
        Dim current
        Dim memory() As Byte
        'new pointer
        Dim loc As IntPtr
        loc = "5581752"
        'Read The Memory
        memory = mem.ReadProcessMemory(loc, 16, out)
        
'Return Value
'these al like this because i was experimenting!
        RichTextBox1.Text = RichTextBox1.Text & memory(0)
        RichTextBox1.Text = RichTextBox1.Text & memory(1)
        RichTextBox1.Text = RichTextBox1.Text & memory(2)
        RichTextBox1.Text = RichTextBox1.Text & memory(3)
        RichTextBox1.Text = RichTextBox1.Text & memory(4)
        RichTextBox1.Text = RichTextBox1.Text & memory(5)
        RichTextBox1.Text = RichTextBox1.Text & memory(6)
        RichTextBox1.Text = RichTextBox1.Text & memory(7)
        RichTextBox1.Text = RichTextBox1.Text & memory(8)
        RichTextBox1.Text = RichTextBox1.Text & memory(9)
        RichTextBox1.Text = RichTextBox1.Text & memory(10)
        RichTextBox1.Text = RichTextBox1.Text & memory(11)
        RichTextBox1.Text = RichTextBox1.Text & memory(12)
        RichTextBox1.Text = RichTextBox1.Text & memory(13)
        RichTextBox1.Text = RichTextBox1.Text & memory(14)
        RichTextBox1.Text = RichTextBox1.Text & memory(15)

    End Sub

it also happens when i read only 8 bytes

-- modified at 18:10 Sunday 30th July, 2006

Thanks, Terence

Re: reading memory from proccess problem!

Duncan Edwards Jones30-Jul-06 23:47

Duncan Edwards Jones

30-Jul-06 23:47

Why the quotes around the number - that makes it a string...

~~loc = "5581752"~~
loc = New IntPtr(5581752)

'--8<------------------------
Ex Datis:
Duncan Jones
Merrion Computing Ltd

Re: reading memory from proccess problem!

TDSp31-Jul-06 1:13

TDSp

31-Jul-06 1:13

I changed it to that and it still does same Frown | :(

Thanks, Terence

made a brealthrough, but it doesnt solve my problem :(

TDSp31-Jul-06 3:42

TDSp

31-Jul-06 3:42

sorry for double post,

ok.. it seems to read 4 byte numbers ok (not doubles) but when it goes over 255/256 (dont know wich) it rolls over to 100 o 0100 !! so i dont know what this is doing.. but is it just chucking it out in a different format?

Thanks, Terence

how to Search for the Installation CD

Syed Ali Raza30-Jul-06 4:30

Syed Ali Raza

30-Jul-06 4:30

I m developing a Searching project in VB.NET 2003.

I want that after installing this project on machine, when user click the program to run, first It should ask for the Installation CD Then run the project, like it happens in Game CDs. I want to do this for the Piracy reasons. How can I do this, Kindly help me

Regards.

Ali Raza Rizvi

Determine the pixel location of specific dots

szevy_suez30-Jul-06 3:59

szevy_suez

30-Jul-06 3:59

Anyone know how we can access the pixel value and compare whether it is black (let's say I want to know what is the series of pixel location which forms a star outline, and usually outline are black, pls correct me if Im wrong) and store the pixel column and row value in an array? How to do this?
Please help.Thanks.

Direct draw in vb.net

_Chosen29-Jul-06 23:25

_Chosen

29-Jul-06 23:25

Please help, i cant find anything to do with direct draw or any fast graphics rendering in vb.net. In c++ it is easy. Can someone please point me in the right direction?

There are 10 types of people in this world, those who understand binary and those who don't!

Re: Direct draw in vb.net

Mekong River30-Jul-06 0:45

Mekong River

30-Jul-06 0:45