Wix CustomAction session.Log not working

Question

I use Wix to install the Windows Installer MSI file. I have a CustomAction that sets the ScheduledTask, and in CustomAction I have introduced some session.Log statements.

If I create everything in debug mode, the session.Log statements seem to work, but when I create in Release mode, it looks like it is no longer being logged. It's right? Or are there other scenarios where session.Log will not work? Is there a way around any of these scenarios, so that session.Log always works?

Edit: CustomAction is written in C # (i.e. managed)

Answer 1

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#define _USE_RTM_VERSION 

void LogString(MSIHANDLE hInstall, TCHAR* szString)
{
    PMSIHANDLE newHandle = ::MsiCreateRecord(2);
    TCHAR szTemp[MAX_PATH * 2];
    sprintf_s(szTemp, MAX_PATH * 2, "-- MSI_LOGGING --   %s", szString); 
    MsiRecordSetString(newHandle, 0, szTemp);
    MsiProcessMessage(hInstall, INSTALLMESSAGE(INSTALLMESSAGE_INFO), newHandle);
}

UINT __stdcall MyCustomAction ( MSIHANDLE hModule )
{
    LogString(hModule, "Whoa! I am a custom action..");
    return ERROR_SUCCESS;
}

Answer 2

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