Re: adding controls at runtime - Visual Basic Discussion Boards

9-Dec-01 19:08

hi,
i am passing a array of string from VB to VC++ DLL's.
i am not able to manipulate with the the argumets received inside the DLL.

i pass the string arry "by ref" from VB to VC++
i receive it in a char** in the VC++
when i move the pointer location an illegal operation error occurs .

Re: VB to C manipulation

James T. Johnson17-Dec-01 2:33

James T. Johnson

17-Dec-01 2:33

Its been a while since I worked with VB -> C++ dlls, but I think you need to pass ByVal because of the way that strings (COM VT_BSTR's) are handled.

Not sure on array's of them, but I remember this for regular strings.

James

Sonork ID: 100.11138 - Hasaki
and a digital cookie (not chocolate chip, its computer chip) goes to whoever can be the first to tell me what Hasaki means. I know someone registered on here can tell me Smile | :)

Direct3D skin meshes

Kelvzs9-Dec-01 18:01

Kelvzs

9-Dec-01 18:01

can anyone tell me how to load a skinned mesh using the Direct3DX Utility Library (helpers)?

GET PUT and UDT

kwk6-Dec-01 16:17

kwk

6-Dec-01 16:17

The PUT statement can be used to write a UDT to a file and GET can recover the UDT, or an array of UDTs. I see that GET can flatten out (write as a series of byte values) the contents and structure of a UDT.

Is there a way that I could perform that same flatting and reconstituion function without actually writing a file?

Is there a way to discover the structure of a UDT without knowing it advance?

I would like to accept a UDT, any UDT or an array of UDTs as a parameter to a OCX, without knowing in advance the caller's UDT structure. Be able to receive a UDT, examine it's structure, manuipulate the contents as a string or byte array, and then return the (changed) UDT to the caller.

Is this possible?

adding controls at runtime

markmyb5-Dec-01 21:44

markmyb

5-Dec-01 21:44

I am using the following code to add two textboxes to the from
option explicit
private withevent objText as textbox

private sub AddTextBox

dim i as integer
for i = 1 to 2
set objText = controls.add("vb.textbox", "text" & i)
next i
end sub

private sub objText_Gotfocus()
objtext.selstart = 0
objtext.sellengh = len(objtext.text)
end sub

I add two textboxes to the form using the controls.add method

first time
set objText = controls.add("vb.textbox", "text1")

second time
set objText = controls.add("vb.textbox", "text2")

the first one losses the referenct to objtext events when the second one is set. there must be a way to preserve the setting???

can someone please help!!!!

Cry | :((

Confusios say "Man who run in front of car get tired, Man who run behind car get exhausted."

Re: adding controls at runtime

Michael P Butler5-Dec-01 23:59

Michael P Butler

5-Dec-01 23:59

My VB skills are a little dusty but I think you need to declare two seperate variables objText and objText2, otherwise you only really have one "control".

Michael Smile | :)

Re: adding controls at runtime

10-Dec-01 14:47

hahahahahah

Re: adding controls at runtime

23-Dec-01 6:47

I've never used this method befor, but it seems cool.
Try this code it may help you:

private sub text1_Gotfocus()
text1.selstart = 0
text1.sellengh = len(text1.text)
end sub

private sub text2_Gotfocus()
text2.selstart = 0
text2.sellengh = len(text2.text)
end sub

Get web site content

5-Dec-01 16:03

Is there a function in vb where i can open a url (http://whatever.com) and have the content of that site come into a variable so I can proceed to parse it?

I know there are nice classes for it in C++ here but I haven't found anything for it in VB.

Thanks

Re: Get web site content

11-Dec-01 18:09

Simple, add a Inet Control to the form

Code :

Dim str1 as string
str1=Inet1.OpenURL("http://www.chadhaajay.net")

Now the entire html page is in string "str1"

Contact for any kind of website design, softare development, custom IE Toolbars at www.chadhaajay.net Blush | :O

changing msgraph data labels using code

5-Dec-01 5:43

I am constructing a graph that plots distance on the x axis and resistivity on the y-axis. There is an extra data series that plots an arrow at various distances to denote a feature, e.g. tree, but to get the arrow in the right place I have to give each point in the series the value 2000. I am able to turn on the data labels and change the orientation, but I can't change the value in the data label from 2000 to "tree".
The code from the help files doesn't seem to work:

With myChart
With .SeriesCollection(1).Points(2)
.HasDataLabel = True
.DataLabel.Text = "Saturday"
End With
End With

The following code I have written after reading the help file and this doesn't work either:

Set chartpath = subGraph!uofGraph.Object.Application.Chart

With chartpath.SeriesCollection(6)
.HasDataLabels = True
.DataLabels.Orientation = 90
End With

Set FeatRs = CurrentDb().OpenRecordset(Me!ItemSQL, DB_OPEN_DYNASET)
Counter = FeatRs.RecordCount
featCount = 1
For X = 1 To Counter

If (IsNull(FeatRs.Fields(6).Value)) Then
MsgBox "No Feature"
FeatRs.MoveNext
Else

With chartpath.SeriesCollection(6).DataLabels(featCount)
.text = "test"
End With
MsgBox "Some Feature"
FeatRs.MoveNext
featCount = featCount + 1
End If
Next X

FeatRs.Fields(6) contains null fields and the value 2000, series 6 is the arrows and has the data labels I want to change.

Thanks in advance
Marc Robinson

VB.Net UserControl

Makyana4-Dec-01 14:32

Makyana

4-Dec-01 14:32

I'm upgrading my VB6 usercontrols to VB.Net and everythink is OK but what can replace :
- Me.Cls '//Used each time I refresh my control
And how can I create a container control ?

Thanks
Makyana

Create a new file by dragging from app

Randy Magnuson4-Dec-01 12:29

Randy Magnuson

4-Dec-01 12:29

I have a VB6 app that manages a bunch of stuff in a database. From a listctrl, I want to drag "one of those objects" onto the Windows desktop and intercept the drop within the shell so I can create a special file that holds some reference info about the item. I'm trying to roughly emulate what happens when you drag a message, appointment, etc. from Outlook onto the desktop. I've looked into Shell Extensions some and can't seem to find what I need. Does anybody know how to do this type of thing?

Handling Class-Module Errors in Form

Firoz3-Dec-01 23:48

Firoz

3-Dec-01 23:48

Hi,

I have a Public Function defined in a form (eg: Form-Func() ) and,
a Public Function in Class Module (eg: Class-Func() ).

I have a global instance of the class.

Now, in Form-Func() , I am calling Class-Func()

If any error occurs in Class-Func(),
I want it to be handled in the Form-Func().

But the call stack unwinding does not pass the unhandled error to Form-Func().
It pops the Runtime Error.

Please some one suggest a proper way to handle the Class-Module error 
from within the caller Function outside the class context..

Thanks

Firoz

logoff

loveuever200030-Nov-01 23:56

loveuever2000

30-Nov-01 23:56

how can i logoff windows 9x using vb codes

Re: logoff

Nick Parker3-Dec-01 4:10

Nick Parker

3-Dec-01 4:10

Public Declare Function ExitWindowsEx Lib "User32" Alias "ExitWindowsEx"(ByVal uFlags as Long,ByVal dwReserved as Long) as Long

Inside your form where you want to log off the user include:

Call ExitWindowsEx(EWX_LOGOFF,0)

The first arguement has several options:
EWX_FORCE = 4
Force any applications to quit instead of prompting the user to close them.
EWX_LOGOFF = 0
Log off the network.
EWX_POWEROFF = 8
Shut down the system and, if possible, turn the computer off.
EWX_REBOOT = 2
Perform a full reboot of the system.
EWX_SHUTDOWN = 1
Shut down the system.

Hope this helps

Nick Parker

ActiveX & Threads...gettin' Funky - Check this Out.

Tim Rymer28-Nov-01 11:36

Tim Rymer

28-Nov-01 11:36

I've got this ActiveX Object (made w/ VC++6.0), it creates a thread (so i can have multiple running at the same time), but it also fires events to my Visual Basic App. With me creating threads cause problems for those events trying to get back to the application?

It seems that way. VB seems to crash when i Fire an event. When i use an activex control, does it have its own thread? Can i redirect the thread ID or something like that? It's just being flat out weird. Has anyone had the same trouble before? I set up connection points at the beginning when i made the obj., is there any other settings that i need to have? Even a little bit of help will go a long way for me...Thanks Y'all. Big Grin | :-D

~TIM!

SHABBA!!

Re: ActiveX & Threads...gettin' Funky - Check this Out.

8-Dec-01 20:45

You can not fire the event from another thread directly, you must use PostMessage notify the main thread in the OCX. True multithread programming in VB6 here:

http://www.banasoft.com/Comm.htm Cool | :cool:

How can I get a Date easily from users?

Remi Morin27-Nov-01 9:18

Remi Morin

27-Nov-01 9:18

I'm looking from a simple Date/Time picker control, I'm unable to find it...

Something like a Text box, formatted, where you can only add a valid date.

Any idéa?

Remi Morin
Rmorin@Operamail.com
Remi.Morin@Lyrtech.com

Re: How can I get a Date easily from users?

Carlos Antollini27-Nov-01 9:30

Carlos Antollini

27-Nov-01 9:30

In the Microsoft windows Common controls-2 6.0 (mscomct2.ocx) you have the dtpiker

Best Regards

Carlos Antollini.
Sonork ID 100.10529 cantollini

Re: How can I get a Date easily from users?

Remi Morin27-Nov-01 9:44

Remi Morin

27-Nov-01 9:44

Thanks!!! It was what I'm looking for!!
sorry to ask for so "beginner info" but usualsy I don't program VB.
Rose | [Rose]

Remi Morin
Rmorin@Operamail.com
Remi.Morin@Lyrtech.com

Re: How can I get a Date easily from users?

Carlos Antollini27-Nov-01 10:09

Carlos Antollini

27-Nov-01 10:09

Lucky for me I work every day in VC++ but sometimes I work in something called VB. Blush | :O

Cheers!!!

and

for ever in CP

Carlos Antollini.
Sonork ID 100.10529 cantollini

Two difficult ADO questions

ssteo23-Nov-01 23:21

ssteo

23-Nov-01 23:21

1. I have one Access .mdb file. How to read the names of the tables in it, using ADO

2. In the same database, how to read the description field of each column, using ADO again

Any answer will be helpfull. Thanx in advance!!!

Re: Two difficult ADO questions

Bill Wilson28-Nov-01 9:15

Bill Wilson

28-Nov-01 9:15

ADO object model doesn't permit this. DAO has the objects and methods you need:

Database object
   TableDefs collection
      TableDef
          Fields collection

Hope this helps,
Bill

Re: Two difficult ADO questions

Oyvind Bratland2-Dec-01 22:51

Oyvind Bratland

2-Dec-01 22:51

1. This can be done using the OpenSchema method of ADODB.Connection.

Set rs = myADOConnection.OpenSchema(adSchemaTables)
While Not rs.EOF
debug.print rs!TABLE_NAME
rs.MoveNext
Wend

2. Don't know, but check out the OpenSchema method.

Øyvind

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