creating a control without a form

[guy]

i am trying to create a custom Combobox from scratch.
this requires that i create the list that the combobox
opens. i've used the ListBox control to do this.

my problem is that i don't know how to "Pop" the list
without it being on a form, but a form can be accessed
through ALT-TAB and Task Manager. and it creates problems.

so can anybody tell me how i can create the list without
a form or maybe make the form act correctly (not showing
on ALT-TAB and not being a seperate proccess)

please help!

[_Andy_]

On Sat, 18 Oct 2003 14:33:19 -0700, "guy" <gu****@msn.com > wrote:

i am trying to create a custom Combobox from scratch.
this requires that i create the list that the combobox
opens. i've used the ListBox control to do this.
Why didn't you inherit a ComboBox? Anyway...
my problem is that i don't know how to "Pop" the list
without it being on a form, but a form can be accessed
through ALT-TAB and Task Manager. and it creates problems.
Controls need a parent (a Form in this case). How are you currently
showing it? Using a Form the same size as the control, or something?
so can anybody tell me how i can create the list without
a form or maybe make the form act correctly (not showing
on ALT-TAB and not being a seperate proccess)

Make sure the Form has ShownInTaskbar= False.

Rgds,

[guy levitan]

1. I am applying a new style and am adding another button (exept the
drop-down button) so i can't inherit the combobox class

2.yes, currently the list is on a form of the size

3.setting the ShowInTaskbar property to false doesn't prevent the form
from being a seperate process thus accesible from ALT-TAB and Task
Manager (This is what i am trying to prevent)
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[Mario]

Hi Guy,

seperate process? what the hell are you talking about?
Do you mean you have two forms in your application? Two forms are not two
processes! Anyway...

You created a control... ok, your control inherits what?
Always must inherit something (at least Object)... Inherits UserControl?
Most custom controls inherit UserControl.

You can drag-and-drop built UserControls from the ToolBox into your form.

Yes, I antecipate your rumble about transparent controls. That is tabu.
Sometimes regions may do the trick, other times it's realy hardcore,
subclassing, etc...
http://www.c-sharpcorner.com/Code/20...ntControls.asp
http://www.elitevb.com/content/01,0071,01/

Regards,
Mario
"guy levitan" <gu****@msn.com > wrote in message
news:O9******** *****@TK2MSFTNG P10.phx.gbl...

1. I am applying a new style and am adding another button (exept the
drop-down button) so i can't inherit the combobox class

2.yes, currently the list is on a form of the size

3.setting the ShowInTaskbar property to false doesn't prevent the form
from being a seperate process thus accesible from ALT-TAB and Task
Manager (This is what i am trying to prevent)
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[guy levitan]

I seem to have not explained myself properly:

I am trying to build a custom ComboBox:
I need to do so without inheriting the ComboBox class
for the combobox object itself, i am using a UserControl with a text box
on it( the border and drop down button are painted via GDI+)
my problem is what to do when the user clicks the drop down button. i
need a list to open. so far i am using a form Containing a ListBox
Control.
My problem is that using the form causes some problems: the form can be
accessed through ALT-TAB and Windows Task Manager. this is something i
don't want happening.

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