ASP DLL Information
When creating or using complex
ASP web applications you will
surely run into one that requires
the use of a DLL. The DLL usually
includes code that was compiled in
VB, C++, or other Windows
programming languages to be used
in the ASP application.
Registering a DLL
Before you can start using the
code that resides in the DLL file,
you must first register the DLL
with the windows runtime library.
There are two ways to let windows
know about this new DLL.
- Save the DLL to
C:\Windows\system32\
or
- Manually register it with
the regsvr32 application
The first option is
self-explanatory, but the second
option takes a bit more work. Here
is a quick How-To on registering
DLLs:
- Find out the location of
your DLL. We will be using C:\Inetpub\wwwroot\codetellerASP\myDLL.dll
in this example.
- Click on the Start menu and
choose Run
- Type in regsvr32.exe "C:\Inetpub\wwwroot\codetellerASP\myDLL.dll"
(With the quotes)
- You should get a
confirmation message if it
succeeded, such as: "DllRegisterServer
in C:\Inetpub\wwwroot\codetellerASP\myDLL.dll
succeeded"
Using Your DLL in ASP
Now that you have registered
your DLL you need to learn how to
access the functions that are
contained within it. Let us assume
for the sake of this example that
the DLL file is called "myDLL.dll"
and the name of the class is "myClass".
To create an instance of this
class you would use the
Server.CreateObject method like
so:
ASP Code:
<%
'Note this is example code, it
will not work
' unless you create a myDLL,
myClass, and a myMethod
Dim myObject
myObject =
Server.CreateObject("myDLL.myClass")
myObject.myMethod("something")
myObject = nothing
%> |
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