Rabin-Karp-Matcher - Visual Basic Discussion Boards

Re: How to use LPCTSTR in VB6.

Septimus Hedgehog12-Apr-13 9:36

Septimus Hedgehog

12-Apr-13 9:36

Thanks Dave. I'll read the link you provided.

If there is one thing more dangerous than getting between a bear and her cubs it's getting between my wife and her chocolate.

Regisrtry Access

SPSandy12-Apr-13 5:19

SPSandy

12-Apr-13 5:19

I am trying to write into registry using the command

RegKey = Registry.CurrentUser.CreateSubKey("Software\\macson")

Now when I run the program only then it correctly writes into the HKEY_CURRENT_USER\\MICROSOFT\\SOFTWARE. But when I include this program as an assembly in the setup it writes into the HKEY_USERS with no entry in HKEY_CURRENT_USER. Now my problem is that the program which is supposed to access the registry data is programmed to read from HKEY_CURRENT_USER using the command

MyRegKey = Registry.CurrentUser.OpenSubKey("SOFTWARE\\macson", True)

Though I have idea that HKEY_CURRENT_USER is a limited copy of HKEY_USERS but since the data is not available in current user my program is failing.

Can anybody help me out on how to solve this issue?

Re: Regisrtry Access

Eddy Vluggen12-Apr-13 6:33

Eddy Vluggen

12-Apr-13 6:33

SPSandy wrote:
But when I include this program as an assembly in the setup it writes into the HKEY_USERS with no entry in HKEY_CURRENT_USER.

A regular executable, or a Windows Service? What's the name of the user that the code is running under?

Bastard Programmer from Hell Suspicious | :suss:

If you can't read my code, try converting it here[^]

Re: Regisrtry Access

SPSandy12-Apr-13 7:08

SPSandy

12-Apr-13 7:08

A regular Executable. The user is the same as is logged in to windows. To be honest could not understand the second part. So sorry if the answer is not to the mark.

Re: Regisrtry Access

Eddy Vluggen12-Apr-13 7:25

Eddy Vluggen

12-Apr-13 7:25

SPSandy wrote:
To be honest could not understand the second part.

My bad, I wanted to know whose credentials/useraccount the application was running under; there's a Username[^] in the environment-class that you can use to log it when the application starts.

Did the setup run as a user or as an administrator?

SPSandy wrote:
But when I include this program as an assembly in the setup it writes

Are you executing it from the installer (during installation)? Or is the regkey written when the app launches the first time?

Bastard Programmer from Hell Suspicious | :suss:

If you can't read my code, try converting it here[^]

Re: Regisrtry Access

SPSandy12-Apr-13 7:36

SPSandy

12-Apr-13 7:36

Thanks a lot for your response. I have got the reason. Thanks for the tips. It is because though the user has administrative Privileges but still I think the Setup needs to be run as Administrator. Once I did this, it has now written inot HKEY_Current_User.

Thanks for the hint. Big Grin | :-D

Re: Regisrtry Access

Eddy Vluggen12-Apr-13 8:07

Eddy Vluggen

12-Apr-13 8:07

You're welcome Smile | :)

Rabin-Karp-Matcher

d3ad-d3vil12-Apr-13 2:05

d3ad-d3vil

12-Apr-13 2:05

is there any body that have code of this algorithm in vb.net
it's be very good.

Re: Rabin-Karp-Matcher

Eddy Vluggen12-Apr-13 6:31

Eddy Vluggen

12-Apr-13 6:31

d3ad-d3vil wrote:
is there any body that have code of this algorithm in vb.net

If someone has that specialized algo, then there's little chance that they'll simply dump the code here. I suggest you go to wikipedia and try to implement it on your own.

FWIW, the only string-search algo that I translated was "Boyer Moore". It has some example-implementations that you can Google for, might be an alternative to your problem.

Bastard Programmer from Hell Suspicious | :suss:

If you can't read my code, try converting it here[^]

Re: Rabin-Karp-Matcher

Kenneth Haugland12-Apr-13 8:30

Kenneth Haugland

12-Apr-13 8:30

Did a quick search, and it seems a rather easy thing to implement, with psudeocode and everything: http://en.wikipedia.org/wiki/Rabin%E2%80%93Karp_algorithm[^]

Message Removed

11-Apr-13 22:58

David venewald

11-Apr-13 22:58

Message Removed

How to catch message WM_COPYDATA in VB?

Member 989133411-Apr-13 22:02

Member 9891334

11-Apr-13 22:02

I need to receive message WM_COPYDATA in VB application for Windows CE. How to do it in System.Windows.Forms.Form?

Re: How to catch message WM_COPYDATA in VB?

Thomas Daniels11-Apr-13 22:10

Thomas Daniels

11-Apr-13 22:10

Hi,

Try to override the WndProc method:

Protected Overrides Sub WndProc(ByRef m As Message)
	If m.Msg = &H4a Then  ' WM_COPYDATA = &H4a
	     ' your code
	Else
		MyBase.WndProc(m)
	End If
End Sub

Hope this helps.

The quick red ProgramFOX jumps right over the Lazy<Dog>.

Re: How to catch message WM_COPYDATA in VB?

Member 989133411-Apr-13 22:23

Member 9891334

11-Apr-13 22:23

Yes, when I try something like this I get an error:

Error 2 'WndProc' is not a member of 'System.Windows.Forms.Form'. C:\Program Files\Measurement Computing\DAQFlex for Windows CE\Examples\VB\AOut\AOutForm.Common.vb 18 13 AOut

What to do?

Re: How to catch message WM_COPYDATA in VB?

Thomas Daniels11-Apr-13 22:30

Thomas Daniels

11-Apr-13 22:30

I think you get the error because you use Windows CE. Have a look at this WndProc method for Windows CE:
MessageWindow.WndProc Method[^]
Hope this helps.

The quick red ProgramFOX jumps right over the Lazy<Dog>.

Re: How to catch message WM_COPYDATA in VB?

Member 989133411-Apr-13 22:54

Member 9891334

11-Apr-13 22:54

It does not work, because my class is inherited form System.Windows.Forms.Form. The class cannot recognize WndProc.

Re: How to catch message WM_COPYDATA in VB?

Thomas Daniels11-Apr-13 22:59

Thomas Daniels

11-Apr-13 22:59

Hi,

Have a look at this blog:
Overriding a Form's WndProc in .NET CF 2.0[^]

The quick red ProgramFOX jumps right over the Lazy<Dog>.

Is DateTime.Now property precise [solved]

econy11-Apr-13 9:30

econy

11-Apr-13 9:30

I am doing a project, the VB program running in PC, reading data from a device, I use a timer control to read the data, in 200 ms interval.

Then I need to store the data to a text file, each set of data with a timestamp, which be used to check when the data be acuqired.

Now I use DateTime.Now property as timestamp, but I found the interval between two timestamp is not equal to 200ms, it's much bigger than 200ms, about 500-700ms.

I wonder if the Now property is not precise, or the VB program consume some time to do other things, then the VB program is not able to handle the reading task on time requirement.

modified 11-Apr-13 16:05pm.

Re: Is DateTime.Now property precise

Kenneth Haugland11-Apr-13 9:35

Kenneth Haugland

11-Apr-13 9:35

Your program isnt the only one running, so you cant know when exactly youll get the thread proccessed. And the time could vary from comuter to computer, however you can give it a higher priority, but than you'll get other problems...

The easiest thing is to get the time stamp from the physical device, if it is that important.

modified 11-Apr-13 15:46pm.

Re: Is DateTime.Now property precise

econy11-Apr-13 9:46

econy

11-Apr-13 9:46

Thanks, you reminded me how the OS do it's work.

Then the DateTime.Now property, in fact, can't get precise timer stamp, right? since it depends on the thread calling it, and OS.

Re: Is DateTime.Now property precise

Kenneth Haugland11-Apr-13 9:52

Kenneth Haugland

11-Apr-13 9:52

You get the time when it is being proccessed if that matters, the trouble is you dont know exactly when youll get it.

Re: Is DateTime.Now property precise

Eddy Vluggen11-Apr-13 9:42

Eddy Vluggen

11-Apr-13 9:42

econy wrote:
I wonder if the Now property is not precise

There's TickCount[^], and there's Ticks[^]. You want the latter.

Do take in account that you're not guaranteed to get CPU-time every 200ms. If it must react to each event of the device, the best path would be to write a device-driver. That would take you beyond VB though.

Bastard Programmer from Hell Suspicious | :suss:

If you can't read my code, try converting it here[^]

Re: Is DateTime.Now property precise

econy11-Apr-13 9:50

econy

11-Apr-13 9:50

Thanks, Now I understand

Re: Is DateTime.Now property precise

Eddy Vluggen11-Apr-13 9:52

Eddy Vluggen

11-Apr-13 9:52

You're welcome Smile | :)