How to find the active form in CF

[Hari]

Hi,
Can any one plz tell me how to know which form is active in an
application. My app contains many forms and requires to identify the
active form very frequently. I found that there is no property like
Form.ActiveForm available in CompactFramework. I could use a class
which contains a Form class variable to store the current form instance
and assign to it the current form instance in the page_load event of
that form. But this may lead to bugs if i fail to assign the correct
form instance. So i prefer a more direct way. Plz help!

- Hari

 

[Simon Hart]

Have you looked at the SNAPI (State Notification API) for Windows Mobile 5
if you are using it. I can't remeber off the top of my head whether the
functionality you require is available in SNAPI.

Alternaively, have you considered creating a base form to which each form
derives which handles this global variable?

Regards
Simon.

 

[Hari]

Hi Simon,
Actually i'm not aware of SNAPI. I'm developing the app. using
..Net Compact Framwork and the language as C#. And regarding your second
suggestion, is it not similar to the way i've done. I've used a class
which is meant for holding the instance of the current form and i'm
setting that instance in the page_load event of every form. I think
this is almost similar to deriving from a base form which holds the
form instance as you said. Is it any different. Any other suggestion?
Thanks for the help.

- Hari

 

[Peter Foot [MVP]]

The managed equivalent of SNAPI is the Microsoft.WindowsMobile.Status
namespace. Take a look at the SystemState.ActiveApplication which may help
although I believe it only stores the names of separate application windows
and not forms within a single application.

Peter

 

[Simon Hart]

It is not the same though is it because you are having to remember to set
this variable in each form (page_load delegate).
If you were to derive from a form, this class would handle this variable so
you would not have to remember to set it in each form you create.

Regards
Simon.