InstallShield has a user story called `standard dll` ( vs `MSI dll` ) where a
built-in CA and describing table data maps MSI properties ( and constants ) to
function arguments. This allows you to take a DLL written by someone that
wasn't specifically designed for MSI and place a wrapper around it to get what
you want done without rolling any code.
I actually have found it useful more then once over the years if WiX was to
decide to do something similar...
Ian Stevenson <[EMAIL PROTECTED]> wrote:
Hi Srini,
The idea is that you don't explicitly pass any arguments to the function call
(the only argument being the MSI handle that get's set by the installer),
instead they are passed by a process of the installer setting up the necessary
properties before the custom action is executed. Then within the DLL's function
you make calls to MsiGetProperty() to get the "arguments" and do your
processing. In a similar way, if you need some OUT arguments you use
MsiSetProperty.
If you google for MsiGetProperty you will find many examples (some not wix
specific, but it does not matter), but here are some starting points for you:
http://msdn2.microsoft.com/En-US/library/aa370134.aspx
http://www.wixwiki.com/index.php?title=Simple_Custom_Action_Dll
That should get you started, plus it seems there are some threads in the
archive for this mailing list, so you should be able to find some tips
searching through that as well.
Good luck,
Ian.
---------------------------------
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of srinivas nomu
Sent: Tuesday, 17 July 2007 7:37 AM
To: Mike Dimmick; wix-users@lists.sourceforge.net
Subject: Re: [WiX-users] How to call a .dll from wix with arguments?
Does this mean I have to use only one argument by combining those two
arguments?. You also said that "Your custom action will have to read any other
information it needs from the install database using e.g. MsiGetProperty."
What is meant by that?. Can you elaborate?.
Any good examples?. Thank you very much.
Srini
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