http://bugs.winehq.org/show_bug.cgi?id=9628
--- Comment #9 from Darragh Bailey felix@compsoc.nuigalway.ie 2008-04-09 16:52:58 --- Actually a little more work has shown the following. When using CreateProcess on windows, if lpApplicationName is used, the value passed will not be added to the start of the lpCommandline string.
Therefore using GetCommandLine will never retrieve this string. However it appears that the is a quirk left in the way the CommandLineToArgv function works. If the string (usually the return value of GetCommandLine) passed in starts with 1 or more spaces, then the first element of argv (argv[0]) will be an empty string, and the rest of the command line will be broken up into the subsequent array elements.
Obviously this means that using argvW = CommandLineToArgvW(GetCommandLineW(), &argc); would fix "Install RPG Maker XP", it would at the moment break the xlviewer installer.
Right now I've eliminated CreateProcess, the creation of argv sent to child processes (build_argv), and GetCommandLine from being points of error.
So either CommandLineToArgvW has a bug in how it generates the command line from the xlviewer installer, or msiexec will need to include a work around for dealing with this special case.