symbian binaries : exe and dll's.

[himsymbian]

hi friends,

This may be a childish question that i am asking but please help me out.
In symbian there are mainly 2 types of executables.

1) exe. (console based application)
2) dll.
They are again divided into:
a) static dll. (shared library [.lib] extension).
b) polymorphic dll. (.app,.fep etc).

Now here are my questions:
------------------------
1) In Symbian,s60 2nd edition sdk, all GUI applications have a (.app) extension , so can I say that every gui application in a second edition sdk is a polymorphic dll???

2) In Symbian,s60 3rd edition sdk, all GUI applications have a (.exe) extension , so what i want to know is that what is the type of gui application in s60 3rd edition????

eagerly waiting for your reply,
Thanks
himanshu karnalkar
Symbian Application Developer.

[himsymbian]

hi friends,

Also correct me if i am wrong in my questions.

Thanks,
himanshu karnalkar.
Symbian Application Developer.

[Nitesh Bhardwaj]

if u are on GUI appn,then it will be a polymorphic dll,does not matter whether u are on 2nd or 3rd.
a GUI appn must having these things..
>a polymorphic DLL, which defines the application for the GUI framework.

>a resource file, which contains definitions for GUI elements and translatable strings.

>an optional application information file (aif), which specifies the icon, caption and embedding capabilities of the application.

[Nitin SuperByte]

if u are on GUI appn,then it will be a polymorphic dll,does not matter whether u are on 2nd or 3rd.
a GUI appn must having these things..


>an optional application information file (aif), which specifies the icon, caption and embedding capabilities of the application.

BTW in 3rd edition i have never seen .aif

[himsymbian]

hi nitish,

Thanks for your reply.
I agree with you on the s60 2nd edition as it has an [.app] extension which is a polymorphic dll (as mentioned in Symbian Os explained- JO Stich bury).

But in s60 3rd edition,the extension for gui application is [.exe],stil you mean to say that it is a polymorphic dll.Has symbian anywhere specified the type of gui application in its documentation.

I wil be happy if any one can get that to me.

Thanks.
himanshu k.
Symbian Application Developer.

[himsymbian]

HI nitin,

can you please clear my doubts regarding the question.

thanks.
himanshu k
Symbian Application Developer.

[Nitesh Bhardwaj]

BTW in 3rd edition i have never seen .aif

My dear who said that is for 3rd,the option i have posted for 2nd.
for 3rd
>a polymorphic DLL, which defines the application for the GUI framework

>a registration file, which contains non-localisable information

>optional localisable information, provided by one or more localisable resource files and icon files

But in s60 3rd edition,the extension for gui application is [.exe],stil you mean to say that it is a polymorphic dll.Has symbian anywhere specified the type of gui application in its documentation.]

See SDK,
"Overview of GUI app building"

[petrib]

As of Symbian 9, since the privilege boundary is between processes, applications are .exe files that run in their own process, whereas previously - Symbian 8 and earlier - they were DLLs - .app extension - and loaded by apprun.exe.

[wizard_hu_]

I guess Petrib has answered your question about 2nd edition.

In case of 3rd edition, GUI executables have no special attributes (though the 2nd UID usually remains to be 0x100039CE - I am not sure if it is mandatory or not). The code becomes a "GUI" one, if it invokes the EikStart::RunApplication method.

[himsymbian]

hi [petrib & wizard_hu_],

I am really grateful to you for the info that you have provided to me, as that was vey basic, i want to request you 1 thing that if i want to have info of these kind of basics, which book, site or blog should i refer.
Could you assist me in that.

Thanks,
himanshu k.
Symbian Application Developer

[stichbury]

You're on a good site already for finding out what you need to know.

For books, you may want to take a look at this discussion thread: http://discussion.forum.nokia.com/fo...d.php?t=134803 The e-learning that Kiran suggests is a great free resource too.

[himsymbian]

Hello Sir(Mr. Jo Stichbury),

I have been following your book since I started doing symbian & still I am refering it. Thanks for that and also for replying to my thread. I need to know a liitle bit of more basics of symbian so i posted the question.

Thanks.
himanshu k.
Symbian Application Developer.

[ltomuta]

Jo, for the next editions make sure to add a picture to the cover.