Can you post your CA C++ code?  Also, you don't need to have a DLL custom
action to check for the existence of a file.  You can do something like this
in your WiX source:

<Property Id="MyFileExists">
 <DirectorySearch Id="MyDirSearch" Path="some path here" Depth="1">
   <FileSearch Id="MyFileSearch" Name="myfile.extension" />
 </DirectorySearch>
</Property>


If the file has been found, then the MyFileExists property will be set to
the full path of your file.  Is this what you're looking for?

On 3/15/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:

 I read that "managed code" in a custom action is a no-no (please forgive
me if I use the wrong terminology) so I am attempting to write my custom
action without using managed code.  Most examples I find seem to use it,
however, so I'm doing the best I can.



I wrote a simple VC++ app (.exe) that will determine if some files exist.
I probably did it badly, but it worked in that context.

I took the same code, and cut& paste into a VC++ file I had setup to
create my dll.

The code was previously a working snippet that would simply set a msi
property to "true" and return ERROR_SUCCESS.

I am now trying to make it do something useful.



After the cut& paste I got some build errors and followed (somewhat) the
steps listed here to resolve them.
http://support.microsoft.com/?kbid=814472

The dll built successfully, but when I run the installer I get error 2896,
"Executing action [2] failed."  That doesn't tell me too much.



I stepped backwards until I had one line that I could comment/uncomment to
make the dll work(return "true")/not work(error 2896)



The one line that causes it to fail (and concequently causes the dll to
double in size) is:



ifstream fin1(filename);



Down the road I was doing 'if (fin1.good())' to see if the file exists
(like I said, probably a bad way, but it was the first thing I did that
seemed to work)



Is attempting to do this fundamentally wrong?

Also, I'm running the installer with /l* but I'm still not getting
anything particularly helpful.  Are there better techniques for debugging?





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