/* Word Document (*.doc) : {00020906-0000-0000-C000-000000000046} */
static const GUID CLSID_WORD =
{ 0x00020906, 0x0, 0x0, { 0xC0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x46 }};
/* Excel Worksheet (*.xls) : {00020820-0000-0000-C000-000000000046} */
static const GUID CLSID_EXCEL =
{ 0x00020820, 0x0, 0x0, { 0xC0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x46 }};
/* PPT Presentation (*.ppt) : {64818D10-4F9B-11CF-86EA-00AA00B929E8} */
static const GUID CLSID_PPT =
{ 0x64818D10, 0x4F9B, 0x11CF, { 0x86, 0xEA, 0x0, 0xAA, 0x0, 0xB9, 0x29, 0xE8 }};
void IDFileType(BSTR bstrFile)
{
HRESULT hr = S_OK;
IStorage* pStg = NULL;
STATSTG ST;
char* pszApp;
if(NULL == bstrFile) return;
/* Open Compound Document for READ Access... */
hr = StgOpenStorage(bstrFile, NULL,
STGM_READ | STGM_SHARE_EXCLUSIVE, NULL, 0, &pStg);
if(FAILED(hr)) {
MessageBox(NULL, "Not a valid Compound Document!",
"Error", MB_SETFOREGROUND);
return;
}
ZeroMemory(&ST, sizeof(STATSTG));
/* Get Storage Stats and check CLSID against known values... */
hr = pStg->Stat(&ST, STATFLAG_NONAME);
if(SUCCEEDED(hr)) {
if (ST.clsid == CLSID_WORD)
pszApp = "Word Application";
else if (ST.clsid == CLSID_EXCEL)
pszApp = "Excel Application";
else if (ST.clsid == CLSID_PPT)
pszApp = "PowerPoint Application";
else
pszApp = "Unknown Application";
SetWindowText(GetDlgItem(g_hWnd, IDC_APPNAME), pszApp);
}
/* Must release IStorage interface to free document!! */
pStg->Release();