API to wait until an object is created properly??

[raghudr]

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

[=?iso-8859-1?B?S2VyZW0gR/xtcvxrY/w=?=]

Hi Raghu,

have a look at these:

Control..::.Han dleCreated Event
Control..::.Han dleDestroyed Event
Control..::.IsH andleCreated Property
Control..::.OnH andleCreated Method
Regards

Kerem

--
-----------------------
Beste Grüsse / Best regards / Votre bien devoue
Kerem Gümrükcü
Latest Project: http://www.codeplex.com/restarts
Latest Open-Source Projects: http://entwicklung.junetz.de
-----------------------
"This reply is provided as is, without warranty express or implied."
<ra*****@gmail. comschrieb im Newsbeitrag
news:35******** *************** ***********@u28 g2000hsc.google groups.com...

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

[Peter Duniho]

On Tue, 21 Oct 2008 02:55:41 -0700, <ra*****@gmail. comwrote:

[...]
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

[raghudr]

On Oct 21, 5:48*pm, "Peter Duniho" <NpOeStPe...@nn owslpianmk.com>
wrote:

On Tue, 21 Oct 2008 02:55:41 -0700, <ragh...@gmail. comwrote:

[...]
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