Modify a file's 'title, comments, or keywords'

[taylormail]

I'm trying to modify the properties of a file such as Title, Subject, Author, Category, Keywords, and Comments programmatically through CVI. Does anyone know how to access these?

Thanks in advance

[taylormail]

to clarify, I'm talking about ANY file, not just a Word/Excel file that CVI has ActiveX fp's for.

[mwgesner]

Try this (this one sets a comment which reads "Comment added here" to a file whose path is stored in fileName):

(add ole32.lib to project as statically linked library)

#include "ole2.h"
...

WCHAR wcFilename[1024];
IStorage *pStorage = NULL;
IPropertyStorage *pPropStg = NULL;
IPropertySetStorage *pPropSetStg = NULL;
PROPSPEC propspec[1];
PROPVARIANT propvarWrite[1];
HRESULT hr;
IID riid;

const FMTID fmtid = FMTID_SummaryInformation;


setlocale( LC_ALL, "" );
i = mbstowcs(wcFilename, fileName, strlen(fileName));
setlocale( LC_ALL, "C" );
wcFilename[i] = 0;

riid = IID_IPropertySetStorage;

hr = StgOpenStorageEx(wcFilename, STGM_READ STGM_SHARE_DENY_WRITE, STGFMT_FILE, 0, NULL,NULL, &riid, (void **)(&pStorage));

hr = pStorage->lpVtbl->QueryInterface(pStorage, &riid, (void **)&pPropSetStg);

hr = pPropSetStg->lpVtbl->Create(pPropSetStg, &fmtid, NULL, PROPSETFLAG_DEFAULT, STGM_CREATESTGM_READWRITESTGM_SHARE_EXCLUSIVE, &pPropStg);

propspec[0].ulKind = PRSPEC_PROPID;
propspec[0].propid = PIDSI_COMMENTS;

propvarWrite[0].vt = VT_LPWSTR;

propvarWrite[0].pwszVal = L"Comment added here";

hr = pPropStg->lpVtbl->WriteMultiple(pPropStg,1,propspec, propvarWrite, NULL);

hr = pPropStg->lpVtbl->Commit(pPropStg, STGC_DEFAULT);

hr = pPropStg->lpVtbl->Release(pPropStg); pPropStg = NULL;

hr = pPropSetStg->lpVtbl->Release(pPropSetStg);

pPropSetStg = NULL;


The available properties to set are:


{"Title", PIDSI_TITLE},

{"Subject", PIDSI_SUBJECT},

{"Author", PIDSI_AUTHOR},

{"Keywords", PIDSI_KEYWORDS},

{"Comments", PIDSI_COMMENTS},

{"Template", PIDSI_TEMPLATE},

{"LastAuthor", PIDSI_LASTAUTHOR},

{"Revision Number", PIDSI_REVNUMBER},

{"Edit Time", PIDSI_EDITTIME},

{"Last printed", PIDSI_LASTPRINTED},

{"Created", PIDSI_CREATE_DTM},

{"Last Saved", PIDSI_LASTSAVE_DTM},

{"Page Count", PIDSI_PAGECOUNT},

{"Word Count", PIDSI_WORDCOUNT},

{"Char Count", PIDSI_CHARCOUNT},

{"Thumbnail", PIDSI_THUMBNAIL},

{"AppName", PIDSI_APPNAME},

{"Doc Security", PIDSI_DOC_SECURITY}

[taylormail]

Thanks. Works great.

I do have a followup question though. Can the method you posted be used to modify the file's 'Category'. The const is PIDDSI_CATEGORY but it's value is 0x02 which is the same as PIDSI_TITLE. So there must be another method of changing the Category. Any thoughts?

[mwgesner]

I believe that the constants that start with PIDDSI will need to use fmtid set to FMTID_DocSummaryInformation vs. the FMTID_SummaryInformation that we have here.