Visual Basic

VB6 Simple Question I think

21-Dec-04 1:11

You might want to look into PE Explorer, here[^].

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

Datagrid

abo el ror20-Dec-04 15:01

abo el ror

20-Dec-04 15:01

I would like to ask how can i retrieve data from the selected row of the Datagrid.

Thank you.

Re: Datagrid

Jay Shankar20-Dec-04 16:38

Jay Shankar

20-Dec-04 16:38

Use DataGrid HitTest Method:

DataGrid.HitTest method[^]

Re: Datagrid

ScottSingleton21-Dec-04 8:10

ScottSingleton

21-Dec-04 8:10

DataGrid1.SelectedItem.Cells(0).Text

(First Column Value From Selected Row)

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dougstratton20-Dec-04 10:56

dougstratton

20-Dec-04 10:56

I have a vb6 app with no forms that is run in dos window. How do I output to the window if I want to send a message. No Msgbox (I don't want things popping up)

so I want something like this

c:\ingroup
c:\You must provide a parameter with ingroupc
c:\Example ingroup /i

Something like that if possible?
thanks

Dave Kreskowiak21-Dec-04 1:06

21-Dec-04 1:06

VB6 couldn't target a console app. You have to call into the Win32 API to create a console and output to it. You might want to try here[^] for a couple of console classes for VB6.

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

dougstratton21-Dec-04 5:27

dougstratton

21-Dec-04 5:27

Thanks I will take a look at the samples.

Do you happen to know how I pass a error level code back after terminating the code? I want to check in the batch file for errors in the code.

Thanks

I found one thing but I put it in the code and tested it and it booted me out of VB and I lost it Smile | :)

Forgot to save.

dougstratton21-Dec-04 5:37

dougstratton

21-Dec-04 5:37

Also wanted to ask if there is an easier way to do this in vb.net?

Dave Kreskowiak21-Dec-04 6:33

21-Dec-04 6:33

All of this is trivial in VB.NET since it, and any other language targeting the .NET Framework, can target a console app. Support for I/O redirection and exit codes are included. Even better support is included in the .NET Framework 2.0 and Visual Studio/Basic .NET 2005.

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

Dave Kreskowiak21-Dec-04 6:28

21-Dec-04 6:28

That would be done with the ExitProcess Win32 API function. VB6 can't do it natively.

Private Declare Sub ExitProcess Lib "kernel32" (ByVal uExitCode As Long)
.
.
    ExitProcess(returnCode)

This will have the effect of terminating your app immediately, so you better have everything cleaned up before you call this.

Also, when you launch a VB6 app from a batch file, it won't wait for it to complete. Unless, of course, you tell it to using:

START /W vbApp.exe
...ERRORLEVEL statements go here

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

m_hussein4-Jan-05 21:06

m_hussein

4-Jan-05 21:06

hi i have strange problem in my project the keybord some time hange and you must trun off the keyborad sokt and trun on again for can type again can you help me and how i save picture in database and view in vb6 program

carlos_rocha20-Dec-04 6:50

carlos_rocha

20-Dec-04 6:50

Hi! Thanks for you reply.I made a little example using the AsyncCallBack class and BeginInvoke() but i reached a result that i didn't expected.I ran the beginInvoke in a different thread and the callback function is located at the form(main thread).After the beginInvoke() my code proceeded(as expected).Then the execution passed to the callback function(in the form) but it wasn´t running neither on the thread or form context, it was in a completly different thread.Strange?For me it was because i was hopping that the callback executed in the form's context.Am i doing anything wrong or is this correct?

Nicholas Cardi20-Dec-04 7:16

Nicholas Cardi

20-Dec-04 7:16

This is the normal behavoir of the AsyncCallBack class. However, you should not let this tread modify any of the forms controls. This is an Windows UI rule and if you violate it you will pay the price Smile | :)

. If you need to modify the forms controls during the call back do the following in the call back function.

Private Sub MyFunct() 'This is your callback function.
If Me.InvokeRequired = True Then
Me.Invoke("Your Delegate here") 'You can create a delegate that matches the call back
'and pass that in. After the invoke the function will be recalled and you will
'end up in the else part of this block
Else
'Do your work here this code is now executing on the UI thread.
End If
End Sub

Forever Developing

carlos_rocha20-Dec-04 7:29

carlos_rocha

20-Dec-04 7:29

Ok! I made that last question because i have and app that raises an event in a thread and the handler is in the main form. The context of the handler is the thread which fired the event but this isn't happening with the async. Callback, thus my confusion. When i raise and event and check out the name of the current thread it gives me the thread that fired the event, if i check the name with the callback the name isn't from the thread that executed the beginInvoke().But if you say that this is the normal procedure fine by me Big Grin | :-D

One less problem for me to handle. But just to know, in what thread is it running? Is it a thread from the thread pool?A system thread?Just out of curiosity...

PS:Ye, i know that is a mistake to modify the UI from another thread.I found out the hard way Big Grin | :-D

Thanks for your concerne.

Nicholas Cardi20-Dec-04 7:47

Nicholas Cardi

20-Dec-04 7:47

OK, this is what I belive is happing. The AsyncCallback is creating a new thread to do the work. I am not sure where this tread comes from but I belive it is from the thread pool Dot Net creates on startup. When you call BeginInvoke that tread starts on the function you have told it to execute. When it is finished it will call your finshed call back.

Forever Developing