Hi all,

I have created lot of controls on a form

what i want to do is for wait until handles are created.

how can we do this??

say rag=new label();

i want to wait until the rag handle has been created.This is necessary
when i restart my system since all my app will be launched as a
windows service and i am getting expections like

"Invoke or begininvoke cannot be called on a control until the window
handle has been created".

Please help me in this i want to know which are the API's used for
this and how to do it??

I want to avoid sleep

thanks in advance,
RAGHU

Hi Raghu,

have a look at these:

Control..::.HandleCreated Event
Control..::.HandleDestroyed Event
Control..::.IsHandleCreated Property
Control..::.OnHandleCreated Method


Regards

Kerem

--
-----------------------
Beste Grüsse / Best regards / Votre bien devoue
Kerem Gümrükcü
Latest Project: http://www.codeplex.com/restarts
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-----------------------
"This reply is provided as is, without warranty express or implied."
<(E-Mail Removed)> schrieb im Newsbeitrag
news:35f45751-4134-4757-85c8-(E-Mail Removed)...
> Hi all,
>
> I have created lot of controls on a form
>
> what i want to do is for wait until handles are created.
>
> how can we do this??
>
> say rag=new label();
>
> i want to wait until the rag handle has been created.This is necessary
> when i restart my system since all my app will be launched as a
> windows service and i am getting expections like
>
> "Invoke or begininvoke cannot be called on a control until the window
> handle has been created".
>
> Please help me in this i want to know which are the API's used for
> this and how to do it??
>
> I want to avoid sleep
>
> thanks in advance,
> RAGHU
>

On Oct 21, 5:48*pm, "Peter Duniho" <NpOeStPe...@nnowslpianmk.com>
wrote:
> On Tue, 21 Oct 2008 02:55:41 -0700, <ragh...@gmail.com> wrote:
> > [...]
> > i want to wait until the rag handle has been created.This is necessary
> > when i restart my system since all my app will be launched as *a
> > windows service and i am getting expections like
>
> > "Invoke or begininvoke cannot be called on a control until the window
> > handle has been created".
>
> > Please help me in this i want to know which are the API's used for
> > this and how to do it??
>
> There is probably some reasonable, high-level way to structure your *
> program so that it doesn't try to access Control instances until after *
> their window handle is created, even notwithstanding the events Kerem *
> mentions.
>
> But, an actual service shouldn't be doing GUI stuff anyway. *Either you're *
> misusing the term service, or there's a broader design problem going on *
> here.
>
> A concise-but-complete code sample would probably clear things up a lot *
> better than a general description.
>
> Pete

Hi pete,

Main problem is:


1)I have created a thread.which shows a splash screen(which is nothing
but a form with borders taken out).

2)now i do rag=new form();
then rag.showdialog();

3)And my application is very big.
all my application will be launched as a windows service

4)By the time my thread initilizes and rag has a valid value.A call
will be made from other application to end the splash

so i will be call invoke method to end the splash screen and then end
the thread.

but since the handle is not having proper value i get an exception.

this problem happens only during the restart of a system rest all
times it is working fine

please reply on this

thanks,
RAGHU