Visual Basic

14-Sep-04 2:13

Hi Im a bit new to VB and try to understand how to build a class structure to store some data. First I tried to do it with type definitions and collections but this did not work, giving compill errors about using local types in "public scope".

The question is how do I do int in a proper way?

Should the types data, entry, value and vector be defined as separat classes or can I build them as types? I need to in other places of the code work with them separatly. If I do them as separate classes is there a way of doing this in one sigle file, most of the would be realy simple simular to a type definition?

What is best to use, a collection or a vector, when I define the entry type/class should I delcare the Values as a vector of value and the do ReDim on this when adding more data or use a collectiond that has suport for all this built in?

What Im trying to do is something like
data
-dataName as string
-DataEntrys() as entry

entry
-entryName as string
-Values() as value
-Vectors() as vector

value
-valueName as string
-valueValue as integer

vector
-vectorName as string
-vectorNumbers() as integer

ActiveX problem

archetype14-Sep-04 1:32

archetype

14-Sep-04 1:32

Hi all,

I've created an ActiveX control using Visual C++ .NET.

When I add this control to a container created with Visual C++ .NET (or a Visual C++ 6.0) everything works and there is no apparently problem. But now, I'm trying to test this ActiveX with an application created with Visual Basic 6.0. The problem is that the ActiveX control does not appear in the list of registered components from the Visual Basic 6.0 (Menu -> Project -> Components, or Ctrl+T). So, I can't add my ActiveX to the Visual Basic 6.0 container.

When I try to make the same operation with a Visual Basic .NET container, I find the same situation, this is, the ActiveX control is not in the registered components list. But the ActiveX control is already registered.
I use the OleView application in order to ensure that the control is registered.

Due to my ActiveX control perfectly works with a Visual C++ .NET (and a Visual C++ 6.0) container, I suppose there is any bad chosen compiler option (by the time, everything is by default). Does anybody experimented the same situation testing his/her ActiveX in a Visual Basic container?

Thanks in advance.

Re: ActiveX problem

Dave Kreskowiak14-Sep-04 3:46

14-Sep-04 3:46

You might want to try using REGSVR32 to unregister, the re-register your .DLL to see if that clear it up. If not, your .DLL is not registering itself properly for some reason. You might want to ask what the complete steps for this process are in the Visual C++ Forum.

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

Re: ActiveX problem

archetype14-Sep-04 4:01

archetype

14-Sep-04 4:01

Thanks for your answer Dave, but I have already followed all these steps. The .OCX is correctly unregistered and also registered by means of the REGSVR32.exe application.

Re: ActiveX problem

Mekong River14-Sep-04 5:10

Mekong River

14-Sep-04 5:10

Try to create setup file for your activex control from third party application. Try to use install shield and package only your activex control and make its option to auto register the control after the installation process.

A thousand mile of journey, begin with the first step.

APO-CEDC
Save Children Norway-Cambodia Office

Timers & Buttons

Anonymous14-Sep-04 1:06

Re: Problem opening design

14-Sep-04 1:06

HELP!!!
Im new to VB.net and i have a project to do and not sure how to do it.
Here it goes:
I want to add and timer & button. I want to make it so that in the first 2 seconds, if the button is not pressed during the 2 seconds, then a point is automatically scored and if the button is pressed then points is the same. Its a game simulation.
So how do i make it that if the button is NOT clicked WITHIN 2 seconds, then a varible scores a point.
What code do i write for the timer or button? Dead | X|

please help asap

Re: Timers & Buttons

pbpb14-Sep-04 1:46

pbpb

14-Sep-04 1:46

Asummed you have form with timer and button:

<br />
Dim m_ButtonClicked As Boolean 'Set this if button is pressed<br />
Dim m_IsTimeGone As Boolean 'Set it after 2 seconds<br />
Dim m_TimeInSecs as Long<br />
<br />

In timer event handler you have to check
m_ButtonClicked before setting m_IsTimeGone (remember to check if this is not 2 seconds from the beginning)

Problem opening design

gbarry13-Sep-04 23:58

gbarry

13-Sep-04 23:58

I got a strange problem on 2 PCs. They have Windows 2000 SP4, Visual Studio 2003 and Framework 1.1.
We are doing asp.net with vb langage.
When I try to open design, even after rebuilding solution, I got the message "The class file 'page.aspx' specified as the codebehind for 'page.aspx.vb' could not be loaded. Make sure that the codebehind attribute in the page or control directive properly references an existing code behind file."
My solution is working well on other PC, the codebehind is correct and the project compile and execute correctly.

More over, in the solution explorer when you are on the vb file, click on the design icon, the previous message appears followed by this french message :
"Aucun éditeur disponible for 'c:\inetpub\wwwroot\page.aspx'. Vérifiez que l'application correspond au type de fichier (.aspx) est installée."
in english something like :
"No editor available for 'c:\inetpub\wwwroot\page.aspx'. Please verify that your application for aspx file is installed."

I try to do a new empty solution,
I try to repair Visual Studio 2003,
I try to uninstall and install newly Visual studio 2003 and framework

but the problem still there.

Please help I have no more idea except reinstall the whole PC.

Purple Monk14-Sep-04 2:15

Purple Monk

14-Sep-04 2:15

Check that in the HTML Page this code is at the top and matches the code behind page

<%@ Page Language="vb" AutoEventWireup="false" Codebehind="PageName.aspx.vb" Inherits="ProjectName.FormName"%>

So in your project i assume

<%@ Page Language="vb" AutoEventWireup="false" Codebehind="Page.aspx.vb" Inherits="ProjectName.Page"%>

Then in you vb class the name is

Public Class Page

When i had this problem re-doing this bit seemed to solve it.

Cheers

"If i was king cigarettes would be free."

How to access any process's memory

Member 136563313-Sep-04 23:24

Member 1365633

13-Sep-04 23:24

Firstly,

Most of us know a lot of games,Especially Like Red Alert 2 or any Command & Conquer Game,There are also
Games where the Player Have Guns and armor,There are some programs called "Trainers" That Can access the
memory of the game and modify the value of the Money,Armor,etc....

This "Trainer" knows the adress of the variable and knows its length (2-4-8-...)bytes so it can modify it.

Now,My question is -----> how do they do that ?

Can VB Do it,I think it must use API Functions to do it.
So how Can I do it in VB evenif I use API?
If VB Can't do it,Sure C++ Or C# can but how ?

In short,I want an Example of Two programs(Source Code VB) In the First there is a variable which I want to make the second program able to modify at runtime and I want the second program to be able to check if the first one is running before trying to modify the variable.

passing a variable from VB.Net to ASP Page

njppp13-Sep-04 21:23

njppp

13-Sep-04 21:23

I'm trying to pass a variable from a vb.net page to an ASP Page to generate a javascript.
Hers's the code in VB.net

Dim ScriptString As String = "<script type='text/javascript'>function Go(){return}</script>"<br />
   ScriptString += "<script type='text/javascript' src='exmplmenu_var.asp ?Ordlkp=False'></script>"<br />
   ScriptString += "<script type='text/javascript' src='menu_com.js'></script>"

Here's the code in ASP to retrive the same

<%if request.QueryString("OrdLkp") then %><br />
	Menu1=new Array("Order LookUp","http://www.dynamicdrive.com","",4,20,138);<br />
	Menu1_1=new Array("Search By Order No","blank.htm","",0,20,138);	<br />
	Menu1_2=new Array("Search By Reference","http://www.cnn.com","",0,20,138);<br />
	Menu1_3=new Array("Search By Order Date","http://www.abcnews.com","",0);<br />
	Menu1_4=new Array("View Jobs on Query","http://www.msnbc.com","",0);<br />
                <br />
<%end if%>

But I am recieving errors at the page.Could anybosy pls tell me where I'm going wrong.

Also,if I wanted to pass a boolean variable instead of the hard coded false value.How can I do that?
Thanks n regards

g

Re: passing a variable from VB.Net to ASP Page

Dave Kreskowiak14-Sep-04 3:39

Re: AddressOf in Vb.net??

14-Sep-04 3:39

This question would get much better results in the ASP.NET Forum.

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

AddressOf in Vb.net??

Member 129565013-Sep-04 16:28

Member 1295650

13-Sep-04 16:28

Hi! gentlepeople,

Probably you might help me regarding this.. I'm new to these Vb.net language. My question is Does AddressOf is accepted in Vb.net?

in this VbCode i have the following components:
- MyAPI.bas (this contains SetCallbacks)
- Callback.bas (this contains the STATE_CALLBACK function)

' API declaration in myAPI.bas <br />
Public Declare Function SetCallbacks Lib "tfm.dll" ( _ <br />
    ByVal hConn As Long, ByVal pfnGuiCallback As Long, _ <br />
    ByVal pGuiCallbackCtx As Long,ByVal pfnGuiStateCallback AsLong,   <br />
    ByVal pGuiCallbackCtx As Long) As Long <br />

- A Form with a button cmdCallback

 <br />
Public Sub cmdCallback_click() <br />
Result = SetCallbacks(Connection, 0&, 0&, AddressOf STATE_CALLBACK, 0&) <br />
  ''Any Code here <br />
End Sub <br />

- i have this module Callback.bas a procedure function called STATE_CALLBACK

<br />
Function STATE_CALLBACK(ByVal pGuiCallbackCtx As Long, ByVal dwState As Long, ByRef pRes As Byte, ByVal Msg As Long, ByVal byProg As Byte, ByVal pSample As Long, ByVal pData As Long) As Long <br />

How will i convert this to vb.net???! I have a module for the Callback..

what i did was with the same format

<br />
Result = SetCallbacks(Connection, 0, 0, AddressOf Callback.STATE_CALLBACK, 0) <br />

and the error appeared was "AddressOf expression cannot convertes to integer because integer is not delegate type" Im getting stucked in here...I really need this badly

Thanks for your kind help.

Hadi Fakhreddine13-Sep-04 21:02

Hadi Fakhreddine

13-Sep-04 21:02

By the way...if you copy-pasted your code correctly...the "AsLong" should be changed to "As Long" OMG | :OMG:

try replacing this:

Public Declare Function SetCallbacks Lib "tfm.dll" ( _ <br />
ByVal hConn As Long, ByVal pfnGuiCallback As Long, _ <br />
ByVal pGuiCallbackCtx As Long,ByVal pfnGuiStateCallback AsLong, <br />
ByVal pGuiCallbackCtx As Long) As Long<br />

with this:

<br />
Public Declare Function SetCallbacks Lib "tfm.dll" ( _ <br />
ByVal hConn As Long, ByVal pfnGuiCallback As Long, _ <br />
ByVal pGuiCallbackCtx As Long,ByVal pfnGuiStateCallback As IntPtr, <br />
ByVal pGuiCallbackCtx As Long) As Long <br />

Re: AddressOf in Vb.net??

Member 129565013-Sep-04 21:37

Member 1295650

13-Sep-04 21:37

i tried your suggestion..

but the error appeared was Overload resolution failed because no accessible 'PTSetGUICallbacks' accepts this number of arguments.

<br />
Result = myAPI.SetCallbacks(Conn, 0, AddressOf Callback.STATE_CALLBACK, 0)<br />

any suggestions are most welcome..
Thanks for your kind help..

I couldn't get the first row from excel file.

kokain13-Sep-04 15:14

kokain

13-Sep-04 15:14

hi,

I could not get the first row from excel file when read data using OLEDB.
The exception that I catched is "Could not find installable ISAM."

Below is my code:

Dim strCnnStr As String = "provider=Microsoft.Jet.OLEDB.4.0; " & _<br />
                    "data source=" & dlgExcelFile.FileName & "; " & _<br />
                    "Extended Properties=Excel 8.0;HDR=No"<br />
            Dim myAdapter As New OleDb.OleDbDataAdapter("select * from [Sheet1$]", strCnnStr)<br />
            Dim myDS As New DataSet<br />
            myAdapter.Fill(myDS)

Please help me. Smile | :)

Thank you very much.

Dave Kreskowiak14-Sep-04 3:35

14-Sep-04 3:35

This is the second time you've posted this...

The problem with the "Could not find installable ISAM" is probably because "HDR=No" is not a valid option for the Excel provider. I would try modifying the sheet your using as a datasource and actually put in Headers on those columns. OLEDB is probably converting the first row into column headers to use them as column names in the resulting data table.

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

Anonymous15-Sep-04 4:18

15-Sep-04 4:18

Thank you.

Is there any option to tell OLEDB the first row is data, not header? I think it's in the connectionstring "HDR=No". But I catched exception when used this. Confused | :confused:

Dave Kreskowiak15-Sep-04 15:07

15-Sep-04 15:07

Not that I can find. The reason your getting an exception is because HDR=No is not a valid parameter in the connection string.

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

Auto Windows Volume Control

kokain15-Sep-04 15:59

kokain

15-Sep-04 15:59

Is there anyway to tell OLEDB that the first row is data, not header? I want to get the first row, but noway now.

Thanks Dave Kreskowiak.

bitpusher13-Sep-04 14:07

bitpusher

13-Sep-04 14:07

Hello,

I'd like my WinXP machine to boot up with the same preset volume (low) each time and then allow the user (me) to adjust it up and down accordingly. This will help ensure that the windows startup chime doesn't wake the neighbors after rocking out the day before.

My first thought was to create a small app that runs from the startup directory that sets a windows mixer property to a preset value, but this would occur too late during the startup routine, so perhaps this should be done upon windows exit?

Does anyone know, offhand, where to find the particular mixer setting for the master mixer volume, and how to launch something when windows is exiting? Or does anyone have any other ideas about how to achieve this?

thanks,

JennyP

Re: Auto Windows Volume Control

Anonymous13-Sep-04 15:55