VB/JScript is still a no go.  The managed blog was ( thankfully ) O.B.E. when 
WiX released managed custom action via DTF.

Personally, if I had the C++ chops, had enough reusable libraries and was 
typically shipping unmanaged apps.... then I probably would be an unmanaged 
purist for CA's.   WiX uses C++ in it's custom actions because customers might 
not need/want .NET and since the CA's are being used by a very wide audience 
it's good to spend the time and make them perfect.

But alas, I've got C# chops, the base class libraries are very powerful and I 
ship nearly all managed apps.  


For me, the choice is easy.  For the rare occasion that I don't want a 
dependency on .NET I either  a) role an InstallScript custom action or b)  
write 
it in DTF first and then borrow a resource from development to port it over to 
C++.

PS-  Don't anyone jump on my InstallScript comment unless you know what you are 
talking about. :-)   Prior is IS 12 I'd agree with you 100%.

Christopher Painter, Author of Deployment Engineering Blog
Have a hot tip, know a secret or read a really good thread that deserves 
attention? E-Mail Me



----- Original Message ----
From: Shaun Hayward <shayw...@omnivex.com>
To: "WiX-users@lists.sourceforge.net" <WiX-users@lists.sourceforge.net>
Sent: Fri, January 14, 2011 12:39:11 PM
Subject: [WiX-users] Custom Actions - C++ vs C# vs VBScript

Hello, WiX Community

I've been playing around with WiX for about a year now and took over my 
company's installations (WiX-based) a few months ago. I'm really enjoying it.

I'm looking for some advice on the pros/cons of various ways of writing Custom 
Actions. I understand that an issue with the Custom Action can prevent your 
installer from working at all. And obviously if a piece of functionality 
already 
exists in WiX then one should not re-write it in a custom action.

I'm mainly a C# dev and doing some rudimentary VC++.

I found it very easy to do Custom Actions in VBScript but Rob Mensching posted 
an article (http://wix.sourceforge.net/manual-wix2/robmen_20040520.htm) that 
outlines why VBScript "sucks" for custom actions. Lack of debugging and 
conflict 
with Virus Scanners seem to be the biggies. I'm assuming these reasons still 
apply and VBScript (or Jscript) should be counted out.

Most of the Custom Action examples I've found have been C# (my preferred 
language) and even Nick Ramirez's excellent book on WiX only gives the C# 
examples. However, I came across another Rob Mensching article 
(http://robmensching.com/blog/posts/2007/4/19/Managed-Code-CustomActions-no-support-on-the-way-and-heres)
 from 2007 that outlines why Managed Custom Actions wouldn't work. Are these 
issues still a consideration?

Of course, VC++ has very few dependencies and probably has the most 
compatibility. Theoretically, you should be able to static link against the 
VC++ 
Runtime and have no external dependencies at all. But C++ code is, for me, a 
lot 
harder to write. The worst is trying to figure out which string is which.

Does anyone have any incites or advice on the pros and cons of each? In 
particular, what are the down-sides of writing custom actions in Managed code 
(C#/VB)?

Thanks
- Shaun



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