How many lables can a form suport ?

[Peter]

hi there, i'm developing an aplication that uses 4 forms.
Each form has about 2000 labels, when I try to open my
third form, an error ocurrs, but no error mesage appears.
I've realised that if I try to crate a form collection
like:

sub Test()
Dim f as new Form1
f.show
end sub

and if form1 has 300 labels and no other controls, the
program hangs, when the 33rd form appears (about 9900
labels).

It worked in VB6.0

What can I do to work this Out ?

Thanks

[Herfried K. Wagner [MVP]]

* "Peter" <pc****@spc.sapec.pt> scripsit:

hi there, i'm developing an aplication that uses 4 forms.
Each form has about 2000 labels, when I try to open my
third form, an error ocurrs, but no error mesage appears.
I've realised that if I try to crate a form collection
like:

sub Test()
Dim f as new Form1
f.show
end sub

and if form1 has 300 labels and no other controls, the
program hangs, when the 33rd form appears (about 9900
labels).

It worked in VB6.0

Labels in VB6 were windowless controls and didn't need much memory.
..NET labels are windows. Have a look at the memory usage for the
application with the task manager.

--
Herfried K. Wagner
MVP · VB Classic, VB.NET
<http://www.mvps.org/dotnet>

[Armin Zingler]

"Peter" <pc****@spc.sapec.pt> schrieb

hi there, i'm developing an aplication that uses 4 forms.
Each form has about 2000 labels, when I try to open my
third form, an error ocurrs, but no error mesage appears.
I've realised that if I try to crate a form collection
like:

sub Test()
Dim f as new Form1
f.show
end sub

and if form1 has 300 labels and no other controls, the
program hangs, when the 33rd form appears (about 9900
labels).

It worked in VB6.0

What can I do to work this Out ?

I guess you are getting a System.ComponentModel.Win32Exception? That's the
one I get. Put a try-catch block around your code and catch the exception.
The NativeErrorCode property returns 14. MSDN says:

14 | Not enough storage is available to complete this operation. |
ERROR_OUTOFMEMORY

One solution: Don't use labels. Instead, paint the text by overriding
OnPaint.

If you also use other controls like Textboxes, I'd consider using a grid,
like the DataGrid, instead.

--
Armin

[Cor]

Hi Peter,

I got this idea when I saw the answer from Armin,

Why do you not use one label and fill that with stringbuilder, while
increasing the hight in the same time?

Just an idea?

Cor

[Peter]

I can't use that solution, because each label must have
diferente colors, or at least be able to.

Tanks

Peter

-----Original Message-----
Hi Peter,

I got this idea when I saw the answer from Armin,

Why do you not use one label and fill that with stringbuilder, whileincreasing the hight in the same time?

Just an idea?

Cor
.

[Chris Dunaway]

On 22 Oct 2003 12:03:30 +0200, Herfried K. Wagner [MVP] wrote:

Labels in VB6 were windowless controls and didn't need much memory.
.NET labels are windows. Have a look at the memory usage for the

In Delphi, there were both windowed and windowless controls. Does the same
hold true for VB.Net? What class is the base class for windowed controls
and what class is the base class for windowless controls?

Could a label control be created that is windowless?

Just wondering

--
Chris

To send me an E-mail, remove the underscores and lunchmeat from my E-Mail
address.

[Fergus Cooney]

Hi Chris,

Yes. You would associate the LiteLabel with an underlying surface and it
would draw itself thereon. Several LiteLabels could thus share the same
surface. (Make it a Graphics and it needn't even be visible - do it memory on
a Bitmap!).

Many problems with this and that to be solved, of course, not least being
how to allow the user to manage these at Design-time.

Regards,
Fergus

[Jay B. Harlow [MVP - Outlook]]

Peter,
In addition to the others comments, Charles Petzold's book "Programming
Microsoft Windows With Microsoft Visual Basic.NET" from MS Press. Gives an
example of how to paint text on a form, then identify when the mouse passes
over or presses one of the pieces of text.

Hope this helps
Jay

"Peter" <pc****@spc.sapec.pt> wrote in message
news:09****************************@phx.gbl...

hi there, i'm developing an aplication that uses 4 forms.
Each form has about 2000 labels, when I try to open my
third form, an error ocurrs, but no error mesage appears.
I've realised that if I try to crate a form collection
like:

sub Test()
Dim f as new Form1
f.show
end sub

and if form1 has 300 labels and no other controls, the
program hangs, when the 33rd form appears (about 9900
labels).

It worked in VB6.0

What can I do to work this Out ?

Thanks

[Peter]

I hope I can find it on the Net

Tanks Jay

-----Original Message-----
Peter,
In addition to the others comments, Charles Petzold's book "ProgrammingMicrosoft Windows With Microsoft Visual Basic.NET" from MS Press. Gives anexample of how to paint text on a form, then identify when the mouse passesover or presses one of the pieces of text.

Hope this helps
Jay

"Peter" <pc****@spc.sapec.pt> wrote in message
news:09****************************@phx.gbl...

hi there, i'm developing an aplication that uses 4 forms. Each form has about 2000 labels, when I try to open my
third form, an error ocurrs, but no error mesage appears. I've realised that if I try to crate a form collection
like:

sub Test()
Dim f as new Form1
f.show
end sub

and if form1 has 300 labels and no other controls, the
program hangs, when the 33rd form appears (about 9900
labels).

It worked in VB6.0

What can I do to work this Out ?

Thanks

.

[Chris Dunaway]

On Wed, 22 Oct 2003 15:26:09 +0100, Fergus Cooney wrote:

Yes. You would associate the LiteLabel with an underlying surface and it

Pardon my ignorance, but what is a "LiteLabel" ? I can find no class in
the MSDN about this. Is that a name you made up?

--
Chris

To send me an E-mail, remove the underscores and lunchmeat from my E-Mail
address.

[Jay B. Harlow [MVP - Outlook]]

Peter,
If you are searching on the web for something similar, search for 'hit test'
or 'hit testing'.

The following article discusses hit testing a line, for text I would use a
rectangle which is generally easier then a line.

http://www.bobpowell.net/hittestlines.htm

Hope this helps
Jay

"Peter" <pc****@spc.sapec.pt> wrote in message
news:00****************************@phx.gbl...

I hope I can find it on the Net

Tanks Jay

-----Original Message-----
Peter,
In addition to the others comments, Charles Petzold's

book "Programming

Microsoft Windows With Microsoft Visual Basic.NET" from

MS Press. Gives an

example of how to paint text on a form, then identify

when the mouse passes

over or presses one of the pieces of text.

Hope this helps
Jay

"Peter" <pc****@spc.sapec.pt> wrote in message
news:09****************************@phx.gbl...

hi there, i'm developing an aplication that uses 4 forms. Each form has about 2000 labels, when I try to open my
third form, an error ocurrs, but no error mesage appears. I've realised that if I try to crate a form collection
like:

sub Test()
Dim f as new Form1
f.show
end sub

and if form1 has 300 labels and no other controls, the
program hangs, when the 33rd form appears (about 9900
labels).

It worked in VB6.0

What can I do to work this Out ?

Thanks

.

[Herfried K. Wagner [MVP]]

* Chris Dunaway <dunawayc@_lunchmeat_sbcglobal.net> scripsit:

Yes. You would associate the LiteLabel with an underlying surface and it

Pardon my ignorance, but what is a "LiteLabel" ? I can find no class in
the MSDN about this. Is that a name you made up?

There is no 'LiteLabel' class. Nevertheless, a "lite label" can be
created by drawing its surface onto the canvas of the underlying
control.

--
Herfried K. Wagner
MVP · VB Classic, VB.NET
<http://www.mvps.org/dotnet>

[Herfried K. Wagner [MVP]]

* Chris Dunaway <dunawayc@_lunchmeat_sbcglobal.net> scripsit:

Labels in VB6 were windowless controls and didn't need much memory.
.NET labels are windows. Have a look at the memory usage for the

In Delphi, there were both windowed and windowless controls. Does the same
hold true for VB.Net? What class is the base class for windowed controls
and what class is the base class for windowless controls?

Could a label control be created that is windowless?

AFAIK windowless controls are currently not supported by the .NET framework.

--
Herfried K. Wagner
MVP · VB Classic, VB.NET
<http://www.mvps.org/dotnet>

[Herfried K. Wagner [MVP]]

* "Cor" <no*@non.com> scripsit:

I got this idea when I saw the answer from Armin,

Why do you not use one label and fill that with stringbuilder, while
increasing the hight in the same time?

Do you want to use tabs to separate the columns?!

--
Herfried K. Wagner
MVP · VB Classic, VB.NET
<http://www.mvps.org/dotnet>

[Michael Kremser]

*Herfried K. Wagner [MVP]* tippselte am *22.10.2003 20:12* MESZ:

AFAIK windowless controls are currently not supported by the .NET framework.

Maybe I have an error in my thoughts, but inheriting from the
'Component' class is similar to a windowless control, isn't it?

Best regards,

Michael

--
Michael Kremser
http://great.dynu.com/

[Herfried K. Wagner [MVP]]

* Michael Kremser <us****************@aon.at> scripsit:

Maybe I have an error in my thoughts, but inheriting from the
'Component' class is similar to a windowless control, isn't it?

It's not a control at all.

--
Herfried K. Wagner
MVP · VB Classic, VB.NET
<http://www.mvps.org/dotnet>

[Fergus Cooney]

Hi Chris,

LOL, I guess I should have put it in quotes like you did.

Yes, the 'LiteLabel' is a made up name for what you're suggesting. I
actually hate names that use 'Lite' - it was a bit tongue-in-cheek.

Regards,
Fergus

[Jay B. Harlow [MVP - Outlook]]

Michael,
I would agree with you in that a Component is a close cousin to a windowless
control.

I saw close cousin as I would consider a control (windowless or windowed) to
actually draw something on the screen, while components do not.

Its probably more correct that windowless controls & components are
overlapping circles where Components such as the ErrorProvider fall into the
overlapping part. Where as components such as MessageQueue do not fall into
the overlapping part.

I could see defining a control similar to how the LinkLabel works where you
can define multiple hyperlinks within the control via the Links property
might be beneficial for Peter. Note this would not be a WindowLess control.
Thinking about it I wonder if the RichTextControl could also be made to
work.

Hope this helps
Jay

"Michael Kremser" <us****************@aon.at> wrote in message
news:em*************@TK2MSFTNGP10.phx.gbl...

*Herfried K. Wagner [MVP]* tippselte am *22.10.2003 20:12* MESZ:

AFAIK windowless controls are currently not supported by the .NET

framework.
Maybe I have an error in my thoughts, but inheriting from the
'Component' class is similar to a windowless control, isn't it?

Best regards,

Michael

--
Michael Kremser
http://great.dynu.com/

[Michael Kremser]

*Herfried K. Wagner [MVP]* tippselte am *22.10.2003 20:34* MESZ:

Maybe I have an error in my thoughts, but inheriting from the
'Component' class is similar to a windowless control, isn't it?

It's not a control at all.

Yeah, that's right, it is definitely no control. But is a windowless
control in VB <7 really a "control"? I think it is just named a
"control" for some reason.

Best regards,

Michael

--
Michael Kremser
http://great.dynu.com/

[Herfried K. Wagner [MVP]]

* Michael Kremser <us****************@aon.at> scripsit:

Maybe I have an error in my thoughts, but inheriting from the
'Component' class is similar to a windowless control, isn't it?

It's not a control at all.

Yeah, that's right, it is definitely no control. But is a windowless
control in VB <7 really a "control"? I think it is just named a
"control" for some reason.

Mhm... It can receive events and its a user interface element.

--
Herfried K. Wagner
MVP · VB Classic, VB.NET
<http://www.mvps.org/dotnet>

[Michael Kremser]

*Herfried K. Wagner [MVP]* tippselte am *22.10.2003 20:58* MESZ:

Maybe I have an error in my thoughts, but inheriting from the
'Component' class is similar to a windowless control, isn't it?

It's not a control at all.

Yeah, that's right, it is definitely no control. But is a windowless
control in VB <7 really a "control"? I think it is just named a
"control" for some reason.

Mhm... It can receive events and its a user interface element.

Which is not right for the Winsock control, for example.

Best regards,

Michael

--
Michael Kremser
http://great.dynu.com/

[Michael Kremser]

*Jay B. Harlow [MVP - Outlook]* tippselte am *22.10.2003 20:45* MESZ:

I saw close cousin as I would consider a control (windowless or windowed) to
actually draw something on the screen, while components do not.

They are not required to do so, but of course they could. Howevery, I
agree with you.

Best regards,

Michael

--
Michael Kremser
http://great.dynu.com/

[Herfried K. Wagner [MVP]]

* Michael Kremser <us****************@aon.at> scripsit:

> Maybe I have an error in my thoughts, but inheriting from the
> 'Component' class is similar to a windowless control, isn't it?

It's not a control at all.

Yeah, that's right, it is definitely no control. But is a windowless
control in VB <7 really a "control"? I think it is just named a
"control" for some reason.

Mhm... It can receive events and its a user interface element.

Which is not right for the Winsock control, for example.

IMO that's not a control. Nevertheless, the Label and Image controls in
VB Classic _are_ controls because they are a _user interface element_.
I mentioned this in my previous post.

--
Herfried K. Wagner
MVP · VB Classic, VB.NET
<http://www.mvps.org/dotnet>

[Michael Kremser]

*Herfried K. Wagner [MVP]* tippselte am *22.10.2003 22:08* MESZ:

>>Maybe I have an error in my thoughts, but inheriting from the
>>'Component' class is similar to a windowless control, isn't it?
>
>It's not a control at all.

Yeah, that's right, it is definitely no control. But is a windowless
control in VB <7 really a "control"? I think it is just named a
"control" for some reason.

Mhm... It can receive events and its a user interface element.

Which is not right for the Winsock control, for example.

IMO that's not a control. Nevertheless, the Label and Image controls in
VB Classic _are_ controls because they are a _user interface element_.
I mentioned this in my previous post.

This is exactly what I meant: The Winsock control is named 'control',
although it's no 'control' in the sense of a 'thing' that can interact
with the user and draws something on the screen. Therefore, it has the
behaviour of a 'Component' in the .net world.

Best regards,

Michael

--
Michael Kremser
http://great.dynu.com/

[Herfried K. Wagner [MVP]]

* Michael Kremser <us****************@aon.at> scripsit:

>>> Maybe I have an error in my thoughts, but inheriting from the
>>> 'Component' class is similar to a windowless control, isn't it?
>>
>> It's not a control at all.
>
> Yeah, that's right, it is definitely no control. But is a windowless
> control in VB <7 really a "control"? I think it is just named a
> "control" for some reason.

Mhm... It can receive events and its a user interface element.

Which is not right for the Winsock control, for example.

IMO that's not a control. Nevertheless, the Label and Image
controls in

VB Classic _are_ controls because they are a _user interface element_.
I mentioned this in my previous post.

This is exactly what I meant: The Winsock control is named 'control',
although it's no 'control' in the sense of a 'thing' that can interact
with the user and draws something on the screen. Therefore, it has the
behaviour of a 'Component' in the .net world.

ACK. Nevertheless, a "litelabel" _is_ a control.

--
Herfried K. Wagner
MVP · VB Classic, VB.NET
<http://www.mvps.org/dotnet>

[Fergus Cooney]

Hi Herfried,

a "litelabel" _is_ a control.

Not if it's the LiteLabel that I was referring to. That's a Component
<associated> with a Control.

Regrds,
Fergus

ps. Why '>' all of a sudden and no indentation? Because how could I spoil that
lovely sequence you've built up between you!

pps. Am I and Michael in the same colour? You'd better answer before Michael
otherwise he'lll get <your> colour.

[Fergus Cooney]

Correction. Ignore that previous post.

"Herfried K. Wagner [MVP]" intoned

* Michael Kremser <us****************@aon.at>scripsit:

>>>>Maybe I have an error in my thoughts, but inheriting from the
>>>>'Component' class is similar to a windowless control, isn't it?
>>>
>>>It's not a control at all.
>>
>>Yeah, that's right, it is definitely no control. But is a windowless
>>control in VB <7 really a "control"? I think it is just named a
>>"control" for some reason.
>
>Mhm... It can receive events and its a user interface element.

Which is not right for the Winsock control, for example.
IMO that's not a control. Nevertheless, the Label and Image
controls in

VB Classic _are_ controls because they are a _user interface element_.
I mentioned this in my previous post.

This is exactly what I meant: The Winsock control is named 'control',
although it's no 'control' in the sense of a 'thing' that can interact
with the user and draws something on the screen. Therefore, it has the
behaviour of a 'Component' in the .net world.

ACK. Nevertheless, a "litelabel" _is_ a control.

--
Herfried K. Wagner
MVP · VB Classic, VB.NET
<http://www.mvps.org/dotnet>

Hi Herfried,
a "litelabel" _is_ a control.

Not if it's the LiteLabel that I was referring to. That's a Component
<associated>with a Control.

Regrds,
Fergus

ps. Why '>' all of a sudden and no indentation? Because how could I spoil that
lovely sequence you've built up between you!

pps. Am I and Michael in the same colour? You'd better answer before Michael
otherwise he'lll get <your>colour.

[Herfried K. Wagner [MVP]]

* "Fergus Cooney" <fi*****@post.com> scripsit:

a "litelabel" _is_ a control.
Not if it's the LiteLabel that I was referring to. That's a Component
<associated> with a Control.

I think that's hard to decide if it is a control.
ps. Why '>' all of a sudden and no indentation? Because how could I spoil that
lovely sequence you've built up between you!
I have configured my newsserver to remove the spaces to make the text
better readable. If there is a higher level
pps. Am I and Michael in the same colour? You'd better answer
before Michael otherwise he'lll get <your> colour.

People will change color if there are multiple replies. For example,
the author of the first post (">") will be colored darkgreen, the writer
of the 2nd post (">>") will be always colored darkred etc.

Regards,
Herfried

--
Herfried K. Wagner
MVP · VB Classic, VB.NET
<http://www.mvps.org/dotnet>