Correct. I highly suggest reading all the Custom Action content in the MSI
SDK. You'll learn all kinds of interesting little facts... like the many
limitations of deferred Custom Actions. <smile/>
On Thu, Sep 9, 2010 at 11:56 PM, Fabio Di Lorenzo <fa...@dilorenzo.ch>wrote:
> Hi Dave,
>
> Im not experienced in C/C++ custom actions, but in VBScript you are unable
> to access any Property during the deferred sequence.
>
> You can workaround this with the following trick:
>
> Create a immediate custom action which reads out the "SourceDir" Property
> and places the value into a property with the exactly same name as the
> deferred custom action.
>
> Afterward you should be able to access the value through the "virtual"
> property called CustomActionData.
>
> Kind Regards,
> Fabio Di Lorenzo
>
> On Fri, Sep 10, 2010 at 3:26 AM, Dave DaveLists <dbfli...@gmail.com>
> wrote:
>
> > (Wix 3.5)
> >
> > I have an installer that places a DLL in the installed program's
> > directory and which we call into to do some custom twiddling at the
> > end of the install. A bit like this:
> >
> > <CustomAction Id="InitializeProduct" FileKey="OurDLL.dll"
> > DllEntry="InitializeTheProduct" Execute="deferred" Return="ignore"
> > Impersonate="no" />
> > <InstallExecuteSequence>
> > <Custom Action="InitializeProduct"
> > Before="InstallFinalize">WixUI_InstallMode=""</Custom>
> > </InstallExecuteSequence>
> >
> > This has been working great. Inside the function
> > "InitializeTheProduct" function in the DLL, I now wish to call
> > MsiGetProperty to get the SOURCEDIR property but this is failing. I
> > found a lot of sample code for calling MsiGetProperty so I copied the
> > pattern (abbreviated a bit to keep this post as small as I can):
> >
> > extern "C" __declspec(dllexport) UINT _stdcall
> > InitializeTheProduct(MSIHANDLE hInstaller)
> > {
> > TCHAR* szValueBuf = NULL;
> > DWORD cchValueBuf = 0;
> >
> > UINT uiStat = MsiGetProperty(hInstaller, TEXT("SOURCEDIR"),
> > TEXT(""), &cchValueBuf);
> > if (ERROR_MORE_DATA == uiStat)
> > {
> > ++cchValueBuf;
> > szValueBuf = new TCHAR[cchValueBuf];
> > uiStat = MsiGetProperty(hInstaller, TEXT("SourceDir"),
> > szValueBuf, &cchValueBuf);
> > }
> >
> > if (szValueBuf != NULL) delete[] szValueBuf;
> > return ERROR_SUCCESS;
> > }
> >
> > The behavior of all this is, I get ERROR_MORE_DATA back from the first
> > call, as expected, but cchValueBuf is 0. I would have expected a
> > different return value if it could not find the property, so a return
> > that says, "Your size of 0 isn't big enough, use 0" is interesting.
> > The 2nd call actually returns ERROR_SUCCESS, but no property.
> >
> > I've tried various permutations of SOURCEDIR (SourceDir, [SOURCEDIR]),
> > and also tried to reference some custom properties, all with the same
> > result. For SourceDir I put in a ResolveSource action to see if that
> > was the problem but it wasn't. The log shows valid values for all the
> > properties I've tried so I am flummoxed.
> >
> > Any thoughts out there on similar troubles found? With Google and Bing
> > search I found some common problems but none applied. Any thoughts
> > apprecitated. Barring that, the reason I am doing this to begin with
> > is I need my DLL entry point to know the path to the MSI that called
> > it, so is there another way of doing this?
> >
> > -Dave
> >
> >
> >
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