How to set the file name of a Word document without saving it from c# and automation II - ms-word

Question

I have asked here a question on how setting the filename of a Word document via automation without saving it. Thanks to Remou, I have received a nice way doing this via calling the FileSummaryInfo-Dialog and setting the Title-property.
However now I have the problem that the client wants to have document names with special chars in (point and underscore) and it seems to be a bug (or a feature) of word, that it cuts the title and only takes the chars before the first special char for building the file name! I have already googled a lot, however was not able to find a resolution for this problem.
The problem is also noticed here (see under gotcha), however without a solution.
Has anybody another solution for setting the filename without saving, or a workaround/bugfix for the mentioned odd behavior?

Answer 1

Try easyhook, since do not have Windows machine besides my hand these days.
following is just the call flow (something like what i did years ago, changed a software's socket bind port to different one by Detours)
About Hook the CreateFileW:
The example in the easyhook's wiki is just what we want here.
CreateFileHook = LocalHook.Create(
LocalHook.GetProcAddress("kernel32.dll", "CreateFileW"),
new DCreateFile(CreateFile_Hooked),
this);
In the CreateFile_Hooked you can change the parameter InFileName, then call real CreateFileW
static IntPtr CreateFile_Hooked(
String InFileName,
UInt32 InDesiredAccess,
UInt32 InShareMode,
IntPtr InSecurityAttributes,
UInt32 InCreationDisposition,
UInt32 InFlagsAndAttributes,
IntPtr InTemplateFile)
{
// FIGURE OUT THE FILE NAME THAT YOU WANT HERE
// IF the InFileName is not your Document name "My.doc", then call orignal CreateFile
// with all the parameter unchanged.
// call original API...
return CreateFile(
YOUR_CHANGED_FILE_NAME_HERE,
InDesiredAccess,
InShareMode,
InSecurityAttributes,
InCreationDisposition,
InFlagsAndAttributes,
InTemplateFile);
}
Call flow:
After you changed the title to "My_Document_2012_11_29",
then hook the CreateFileW of Word process.
For example when the InFileName is "My.doc",
then you should change it to "My_Document_2012_11_29".
Because this is done in the Word process, so the Detoured function do not know
"My.doc" is mapping to "My_Document_2012_11_29".
There is lot ways to get this mapping info, one is save this mapping info to
a known file in your app, and read the file in the Detoured function.