.Dll is the Source code of ur deployed application.
.Exe is the presentation of ur frentend forms.
When u deployed ur application at that time the .Dll,.EXE 
files will create

No,It is not like that.
The main difference is that .exe files are executed in its 
own address space whereas .dll files requires address space 
to run

both are the executable files.But main difference is 
that .exe can run independantly.But .dll can be part of 
the .exe.
So dll is the superset of exe.

both r executable but,.dll files can b reused in the 
application.where as .EXE files cannot be reused

both r executable but,.dll files can b reused in the 
application.where as .EXE files cannot be reused

Both r executable files,.dll run in application process 
memory,but .exe run in its own process memory.

.DLL                             .EXE

1. It can be reused.          1. It cannot be reused
2. It can be versioned.       2. It cannot be versioned.
3. It is not self executable  3. It is self executable.
4. It doesn't have main       4. It will have main      
function.                        function.

An ActiveX Dll runs is an in process server running in the 
same memory space as the client process.

An ActiveX Exe is an out of process server which runs in 
it's own separate memory space.

Question 2 is the same as question 1.

Advantages of ActiveX Dll
-------------------------
1) An in-process component shares its client’s address 
space, so property and method calls don’t have to be 
marshaled. This results in much faster performance.

Disadvantages of ActiveX Dll
----------------------------
1) If an unhandled error occurs it will cause the client 
process to stop operating.

Advantages of ActiveX Exe
-------------------------
1) The component can run as a standalone desktop 
application, like Microsoft Excel or Microsoft Word, in 
addition to providing objects.
2) The component can process requests on an independent 
thread of execution, notifying the client of task 
completion using events or asynchronous call-backs. This 
frees the client to respond to the user.
3)If an error occurs the client processes can continue to 
operate.

Disadvantages of ActiveX Exe
----------------------------
1) Generally slower than an ActiveX dll alternative.

Rahul Mehta (MCAD)
Systime India

DLL is a dynamic link library file that we can directly 
execute. if we want to use dll then we need to add refence 
in our progrma in Dll there NO Main function. EXE file is 
excutable file that we can directly run.In exe It must be 
one statr point mena Main function.

A dll use same memory space of client while running.
An exe use own memory space separate from client while 
running.
A dll is much faster.
A exe can be run as standalone program.

DLL - inprocess
DLL runs along with the application which is sharing that 
particular DLL. If we interrupt that application that DLL 
also affected which in turn affects all onter applications 
which is using that application.

EXE - outprocess
EXE runs seperately.

DLL isa inprocess component i.e. it runs in the same 
process space (means sever n dll both share the same 
process space) whereas exe is a outof process component 
means server n exe runs in its own process space.

* In case of dll any error in dll causes makes the 
application off whereas in case of exe it cann't

*dll is faster than exe

DLL is a dependent type of program. Every DLL has an entry 
point method and Dll gets loaded only when a call to it is 
made from any application for the first time. 

Exe is a self-running type of program.

1) 
DLL: Can not run independently. Runs with EXE.
EXE: Can run independently.


2)
DLL: Takes up space in memory in processess' memory space, 
DLL is in-process component.
EXE: Takes up space in memory separately, EXE is Out-
process.


3)
DLL: Runs faster than exe.
EXE: Slower than DLL.

4)
DLL: error causes off the application.
EXE: can't.

5)
DLL: Doesn't have own main entry point, handled by other 
method(s).
EXE: Have own entry point, handled by OS.