i'm really new to C++-programming and i've got an a problem with writing into a xml document.
I'm using a slightly changed example of xml outputter from msdn (http://msdn.microsoft.com/en-us/library/ms766497(VS.85).aspx).
HRESULT CreateAndAddTestMethodNode(string name)
{
HRESULT hr = S_OK;
IXMLDOMElement* pElement = NULL;
CHK_HR(CreateAndAddElementNode(pXMLDom, L"method", L"\n\t", pClass, &pMethod));
CHK_HR(CreateAndAddAttributeNode(pXMLDom, L"name", stringToPCWSTR(name), pMethod));
//more Attribute Nodes (deleted for better overview ;) )
CleanUp:
SAFE_RELEASE(pMethod);
return hr
}
I'm giving a string to CreateAndAddTestMethodNode which convert it with stringtopcwstr to a pcwstr, or should do it.
//convert string to pcwstr
PCWSTR stringToPCWSTR (const std::string& str)
{
int len;
int slength = (int)str.length() + 1;
len = MultiByteToWideChar(CP_ACP, 0, str.c_str(), slength, 0, 0);
wchar_t* buf = new wchar_t[len];
MultiByteToWideChar(CP_ACP, 0, str.c_str(), slength, buf, len);
std::wstring result(buf);
delete[] buf;
PCWSTR pResult = result.c_str();
return pResult;
}
But it only returns something like
"0x00bb9908 "ﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮﻮ" which causes an access violation in one of the next methods.
It would be really great if someone could give me clue where i did the failure.
Thank You.
The result of c_str() gets destroyed along with the result string (when it goes out of scope). You will need to explicitly allocate memory for it.
You could make the return type for stringToPCWSTR as a const reference to PCWSTR i.e. const PCWSTR&
Related
I'm trying to get the last opened directory by an open file dialog, and it seems that we can get it by first retrieving the key's name that contains the path using the first BYTE of the MRUListEx key, then the path can be obtained by reading the value of this key's name.
MRUListEx key can be find at: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\ComDlg32\LastVisitedPidlMRU.
The problem is that I don't know how to properly fill the "SHITEMID" structure. (it doesn't let me access the index, and it throws a Memory access violation). I don't even know if the code below is valid in any points.
Sorry, the code is very dirty for the moment but I'll revamps it when I finally find what causes these errors.
void MyClass::OnDocumentSave(bool showSaveDlg)
{
// Do something that is not relevant here...
try {
HKEY hKey = NULL;
std::wstring regPath = LR"(Software\Microsoft\Windows\CurrentVersion\Explorer\ComDlg32\LastVisitedPidlMRU\)";
LSTATUS statusCode = RegOpenKeyExW(HKEY_CURRENT_USER, regPath.data(), 0, KEY_QUERY_VALUE, &hKey);
if (statusCode != ERROR_SUCCESS)
throw std::exception(std::string("Unable to open the specified registry key, sys err code: ") + std::to_string(statusCode));
BYTE data[MAX_PATH];
DWORD bufferSize = MAX_PATH;
statusCode = RegGetValueW(hKey, L"", L"MRUListEx", RRF_RT_REG_BINARY, NULL, &data, &bufferSize);
if (statusCode != ERROR_SUCCESS)
throw std::runtime_error(std::string("Failed at RegGetValue() Sys error code: ") + std::to_string(statusCode));
// Please note that the buffer has intentionally a fixed size here and everything is
// simplified for readability, but it uses dynamic memory allocation in the real code to
// handle errors such as ERROR_MORE_DATA
BYTE* pathData[512];
bufferSize = 512;
DWORD type = 0; // In case it matters, the returned value is 3
statusCode = RegGetValueW(hKey, L"", std::to_wstring(data[0]).c_str(), RRF_RT_REG_BINARY, &type, &pathData, &bufferSize);
if (statusCode != ERROR_SUCCESS)
throw std::runtime_error(std::string("Failed at RegGetValue() Sys error code: ") + std::to_string(statusCode));
// I don't know how to fill this structure, the documentation is very minimal,
// and I don't understand it.
int offset = sizeof(APPNAME);
SHITEMID shellIDList[2]{
// Throw a memory access violation at 0x*****, the debugger can't seems to
// get anything in pathData.
{ sizeof(USHORT) + sizeof(pathData), *pathData[0 + offset] },
{ 0, 0 } };
ITEMIDLIST idl{ shellIDList[0] };
// This is supposed give me the last path that was opened by a File Picker.
SHGetPathFromIDListW(&idl, initialDir.data());
}
catch (std::exception& e) {
// Silently set the initial directory to a hard-coded path instead of getting the registry value.
}
}
You don't seem to understand how types and simple arrays work! BYTE* pathData[512]; is not a 512 byte buffer. Use BYTE pathData[512];.
After reading into pathData, call SHGetPathFromIDList((PCIDLIST_ABSOLUTE) pathData, ...);.
That being said, that ComDlg32 key is undocumented and I don't think it stores a pidl so even if your code is corrected it is not going to work.
EnumMRUListW is a documented function you can call but it is not going to help you decode the data.
It looks to me like the location might be prefixed with the name of the .exe so as a minimum you would have to skip (lstrlenW(pathData)+1)*2 bytes before you find the real data...
If you're going for undocumented stuff, here is a code that can dump an MRU list like the LastVisitedPidlMRU one:
// the Shell object that can read MRU lists
static GUID CLSID_MruLongList = { 0x53bd6b4e,0x3780,0x4693,{0xaf,0xc3,0x71,0x61,0xc2,0xf3,0xee,0x9c} };
typedef enum MRULISTF
{
MRULISTF_USE_MEMCMP = 0x0,
MRULISTF_USE_STRCMPIW = 0x1,
MRULISTF_USE_STRCMPW = 0x2,
MRULISTF_USE_ILISEQUAL = 0x3,
};
typedef int (__stdcall *MRUDATALISTCOMPARE)(const BYTE*, const BYTE*, int);
MIDL_INTERFACE("00000000-0000-0000-0000-000000000000") // unknown guid but we don't care
IMruDataCompare : public IUnknown
{
public:
virtual HRESULT CompareItems(const BYTE*, int, const BYTE*, int) = 0;
};
MIDL_INTERFACE("d2c22919-91f5-4284-8807-58a2d64e561c")
IMruDataList2 : public IUnknown
{
public:
virtual HRESULT InitData(UINT uMax, MRULISTF flags, HKEY hKey, LPCWSTR pszSubKey, MRUDATALISTCOMPARE pfnCompare) = 0;
virtual HRESULT AddData(const BYTE* pData, DWORD cbData, DWORD* pdwSlot) = 0;
virtual HRESULT InsertData(const BYTE*, DWORD cbData, int* piIndex, DWORD* pdwSlot) = 0;
virtual HRESULT FindData(const BYTE* pData, DWORD cbData, int* piIndex) = 0;
virtual HRESULT GetData(int iIndex, BYTE* pData, DWORD cbData) = 0;
virtual HRESULT QueryInfo(int iIndex, DWORD* pdwSlot, DWORD* pcbData) = 0;
virtual HRESULT Delete(int iIndex) = 0;
virtual HRESULT InitData2(UINT uMax, MRULISTF flags, HKEY hKey, LPCWSTR pszSubKey, IMruDataCompare* pfnCompare) = 0;
};
int main()
{
CoInitialize(NULL);
{
CComPtr<IMruDataList2> mru;
if (SUCCEEDED(mru.CoCreateInstance(CLSID_MruLongList)))
{
const int max = 100; // get max 100 entries
mru->InitData(max, MRULISTF_USE_MEMCMP, HKEY_CURRENT_USER, L"Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\ComDlg32\\LastVisitedPidlMRU\\", nullptr);
for (auto i = 0; i < max; i++)
{
DWORD slot;
DWORD size;
// get size
if (FAILED(mru->QueryInfo(i, &slot, &size)))
continue;
// get data
// note beginning is a LPWSTR containing exe data
auto data = (LPBYTE)_alloca(size);
if (FAILED(mru->GetData(i, data, size)))
continue;
// the rest is a PIDL
auto pidl = (LPCITEMIDLIST)(data + (lstrlen((LPWSTR)data) + 1) * 2);
// get the shell item
CComPtr<IShellItem> item;
if (SUCCEEDED(SHCreateItemFromIDList(pidl, IID_PPV_ARGS(&item))))
{
// get its path
CComHeapPtr<WCHAR> path;
item->GetDisplayName(SIGDN::SIGDN_DESKTOPABSOLUTEPARSING, &path);
wprintf(L"Executable: %s LastVisited: %s\n", data, path);
}
}
}
}
CoUninitialize();
}
PS: I'm using ATL's smart classes
I finally figured out how to create an ITEMIDLIST structure, and it all works well.
Explanations:
After some test, I've concluded that this value is not necessarily updated. The application that uses a file picker needs to write to the registry to reflect changes.
For example, VS Community 2022 / VS Code updates this value, but the new Microsoft Notepad does not (not sure for the old one). Apparently, .NET applications seem to be updated automatically, though.
First, we obviously must open the key at Software\Microsoft\Windows\CurrentVersion\Explorer\ComDlg32\LastVisitedPidlMRU.
The stored data value we need is on one of the values, which has a number as a name.
The first byte of the MRUListEx value lies the last path.
HKEY hKey = NULL;
std::wstring regMRUPath = LR"(Software\Microsoft\Windows\CurrentVersion\Explorer\ComDlg32\LastVisitedPidlMRU\)";
LSTATUS statusCode = RegOpenKeyExW(HKEY_CURRENT_USER, regMRUPath.data(), 0, KEY_QUERY_VALUE, &hKey);
if (statusCode != ERROR_SUCCESS)
// Handle error
BYTE data[MAX_PATH];
DWORD bufferSize = MAX_PATH;
statusCode = RegGetValueW(hKey, L"", L"MRUListEx", RRF_RT_REG_BINARY, NULL, &data, &bufferSize);
if (statusCode != ERROR_SUCCESS)
// Handle error
std::wstring keyName = std::to_wstring(data[0]);
Now that we have the value, we can get its data.
DWORD reqBuffSize = 0;
statusCode = RegQueryValueExW(hKey, keyName.data(), NULL, NULL, NULL, &reqBuffSize);
if (statusCode != ERROR_SUCCESS)
// maybe the specified key is invalid or missing.
BYTE pathData[reqBuffSize];
statusCode = RegGetValueW(hKey, L"", keyName.data(), RRF_RT_REG_BINARY, NULL, &pathData, &reqBuffSize);
if (statusCode != ERROR_SUCCESS)
// maybe the specified key is invalid or missing.
We have another problem: The path is not directly accessible. The executable name is prefixed from the real path, so we must remove it.
Actually, it's very easy. The delimiter between the executable name and the real path is \0\0\0.
const size_t offset = (lstrlenW(reinterpret_cast<LPCWSTR>(pathData)) * sizeof(wchar_t))
+ (2 * sizeof(wchar_t));
The obtained value is not human-readable, but it actually stores a PIDL, so we can get it with SHGetPathFromIDList. The ITEMIDList is not very well documented on the Microsoft's website, but here's a way to create one of these things:
IMalloc* pMalloc;
if (FAILED(SHGetMalloc(&pMalloc)))
// handle error, failed to get a pointer to the IMalloc interface.
PIDLIST_ABSOLUTE pIdl = (PIDLIST_ABSOLUTE)pMalloc->Alloc((reqBuffSize - offset) + 1);
pIdl->mkid.cb = (sizeof(USHORT) + (reqBuffSize - offset));
memcpy_s(pIdl->mkid.abID, (reqBuffSize - offset) + 1, pathData + offset, (reqBuffSize - offset) + 1);
PIDLIST_ABSOLUTE pNext = ILGetNext(pIdl);
if (!pNext)
// handle error, failed to get a pointer to the next item
pNext->mkid.cb = 0;
initialDir.reserve(MAX_PATH * 2);
The ITEMIDList structure has two members: cb and abID. cb is the size of a USHORT + the size of the data, and abID is a pointer to the data itself.
The last ITEMIDList struct must have cb set to zero to mark the end. ILGetNext gives us a pointer to the next element.
// Finally, return the path!
std::wstring retValue;
retValue.reserve(MAX_PATH);
if (FALSE == SHGetPathFromIDList(pIdl, initialDir.data())) {
// oh no! free the allocated memory and throw an exception
}
pMalloc->Free(pIdl);
It's not as hard as it seems to be at the beginning, but if you want to get this value for use with a file picker, it's recommended to use COM instead since it's easier and less error-prone. Thank tou all for tour response and have a good day!
If you want to get the path from a specified extension, see the OpenSavePidlMRU key. It works the same, but it requires some little adjustments.
I'm attempting to read text into a CString using an LPSTREAM, but it doesn't seem to be working correctly, here is the code that I'm calling:
static HRESULT UTL_ReadStreamTxt(MyStorage* pSrcStg, const char* pszStream, CString* myCStr, int size)
{
HRESULT hrRet = STG_E_INVALIDPARAMETER;
LPSTREAM lpSrc = NULL;
ULONG ul;
TRY
{
USES_CONVERSION;
HRESULT hrSrc = pSrcStg->GetStg()->OpenStream(CT2COLE(strSrc),
NULL,
STGM_READ | STGM_SHARE_EXCLUSIVE,
0,
&lpSrc);
if (hrSrc != NOERROR)
{
hrRet = hrSrc;
}
else
{
hrRet = lpSrc->Read(&myCStr, size, NULL); // Read into CString
}
}
CATCH_ALL(e)
{
hrRet = STG_E_UNKNOWN;
}
END_CATCH_ALL
_AfxRelease((LPUNKNOWN*)&lpSrc);
return hrRet;
}
When it reads into the string, Visual Studio says that the data in the CString is corrupted.
The compound storage's stream contents are the following:
abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz
I'm not entirely sure I'm using Read() correctly, How do I fix this issue?
The main problem is that you are passing a bad pointer to Read(). You are passing the memory address of the myCStr parameter itself, not the address of the CString being pointed at, or more accurately, the memory address of a character buffer that the CString owns. The code compiles only because Read() takes a simple void* pointer to a buffer, and any pointer is implicitly convertible to void*.
Also note that CString is based on TCHAR, which maps to either char or wchar_t depending on whether you are compiling your project for ANSI/MBCS or Unicode. So, reading from the stream directly into a CString will only work correctly if:
the stream contains ANSI characters and TCHAR maps to char.
the stream contains UTF-16 characters and TCHAR maps to wchar_t.
If the stream's character type does not match the character type used by CString, you would have to first read the stream into an intermediate buffer and then convert that to TCHAR before it can be stored in the CString.
Try something more like this:
static HRESULT UTL_ReadStreamTxt(MyStorage* pSrcStg, const char* pszStream, CString* myCStr, int size)
{
HRESULT hrRet = STG_E_INVALIDPARAMETER;
LPSTREAM lpSrc = NULL;
ULONG ul;
LPVOID buffer;
TRY
{
USES_CONVERSION;
HRESULT hrSrc = pSrcStg->GetStg()->OpenStream(CT2COLE(strSrc),
NULL,
STGM_READ | STGM_SHARE_EXCLUSIVE,
0,
&lpSrc);
if (hrSrc != S_OK)
{
hrRet = hrSrc;
}
else
{
// if the stream's character type matches TCHAR...
buffer = myCStr->GetBuffer(size / sizeof(TCHAR));
hrRet = lpSrc->Read(buffer, size, &ul);
myCStr->ReleaseBuffer(ul / sizeof(TCHAR));
// else, if the stream's character type is 'char' and TCHAR is 'wchar_t'...
CStringA tmp;
buffer = tmp.GetBuffer(size);
hrRet = lpSrc->Read(buffer, size, &ul);
tmp.ReleaseBuffer(ul);
*myCStr = CString((LPSTR)tmp, tmp.GetLength());
// else, if the stream's character type is 'wchar_t' and TCHAR is 'char'...
CStringW tmp;
buffer = tmp.GetBuffer(size / sizeof(wchar_t));
hrRet = lpSrc->Read(buffer, size, &ul);
tmp.ReleaseBuffer(ul / sizeof(wchar_t));
*myCStr = CString((LPWSTR)tmp, tmp.GetLength());
// alternatively, you can do the above 2 cases more generically...
typedef CStringT<char or wchar_t> CStreamString;
CStreamString tmp;
buffer = tmp.GetBuffer(size / sizeof(CStreamString::XCHAR));
hrRet = lpSrc->Read(buffer, size, &ul);
tmp.ReleaseBuffer(ul / sizeof(CStreamString::XCHAR));
*myCStr = CString((CStreamString::PXSTR)tmp, tmp.GetLength());
}
}
CATCH_ALL(e)
{
hrRet = STG_E_UNKNOWN;
}
END_CATCH_ALL
_AfxRelease((LPUNKNOWN*)&lpSrc);
return hrRet;
}
i try to create link to file in StartMenu folder, my code:
bool createStartMenuEntry(string targetPath, string name){
std::wstring stemp = s2ws(targetPath);
LPCWSTR target = stemp.c_str();
WCHAR startMenuPath[MAX_PATH];
HRESULT result = SHGetFolderPathW(NULL, CSIDL_COMMON_PROGRAMS, NULL, 0, startMenuPath);
if (SUCCEEDED(result)) {
std::wstring linkPath = std::wstring(startMenuPath) + s2ws(name);
LPCWSTR link = linkPath.c_str();
//TEST MESSAGE!!!
MessageBox(NULL, LPCSTR(target), LPCSTR(link), MB_ICONWARNING);
CoInitialize(NULL);
IShellLinkW* shellLink = NULL;
result = CoCreateInstance(CLSID_ShellLink, NULL, CLSCTX_ALL, IID_IShellLinkW, (void**)&shellLink);
if (SUCCEEDED(result)) {
shellLink->SetPath(target);
//shellLink->SetDescription(L"Shortcut Description");
shellLink->SetIconLocation(target, 0);
IPersistFile* persistFile;
result = shellLink->QueryInterface(IID_IPersistFile, (void**)&persistFile);
if (SUCCEEDED(result)) {
result = persistFile->Save(link, TRUE);
persistFile->Release();
}
else {
return false;
}
shellLink->Release();
}
else {
return false;
}
}
else {
return false;
}
return true;
}
String to widestring conversion:
std::wstring s2ws(const std::string& s)
{
int len;
int slength = (int)s.length() + 1;
len = MultiByteToWideChar(CP_ACP, 0, s.c_str(), slength, 0, 0);
wchar_t* buf = new wchar_t[len];
MultiByteToWideChar(CP_ACP, 0, s.c_str(), slength, buf, len);
std::wstring r(buf);
delete[] buf;
return r;
}
When I call my func like createStartMenuEntry("E:\\file.exe" , "File"), in test message I have only first letters of path and shortcut isn't created, I think, problem in unicode conversion.
There are multiple problems here:
MessageBox(NULL, LPCSTR(target), LPCSTR(link), MB_ICONWARNING); is all kinds of wrong. You should not be casting strings like this. If you are compiling without UNICODE defined, you must use MessageBoxW() to display a LPCWSTR string. You get a single character because "c:\\" as a Unicode string is 'c',0,':',0,'\\',0,0,0 in memory, and that is the same as a "c" string when treated as a narrow ANSI string.
You ignore the result of persistFile->Save()! You also ignore the results of SetPath() and SetIconLocation().
A normal user cannot write to CSIDL_COMMON_PROGRAMS, only administrators have write access to that folder, because it is shared by all users. If you are not planning to require UAC elevation, you must write to CSIDL_PROGRAMS instead.
You should not use std::string to store paths, only std::wstring and WCHAR*/LP[C]WSTR, because paths that contain certain Unicode characters cannot be represented in a narrow ANSI string.
I'm trying to create a file, where one of the parameters has been passed in to the method and is of the type PCWSTR. My code creates a .url file and saves the Url into the file:
wchar_t array1[] = "[InternetShortcut]\nURL=";
wchar_t array2[] = pdwFavoriteUrl;
wchar_t * DataBuffer = new wchar_t[wcslen(array1) + std::strlen(array2) + 1];
std::strcpy(DataBuffer,array1);
std::strcat(DataBuffer,array2);
// Write data to file
DWORD dwBytesToWrite = (DWORD)strlen(DataBuffer);
DWORD dwBytesWritten = 0;
BOOL bErrorFlag = FALSE;
bErrorFlag = WriteFile(hFile, DataBuffer, dwBytesToWrite, &dwBytesWritten, NULL);
if (FALSE == bErrorFlag)
{
// Log error
hr = E_FAIL;
}
else
{
if (dwBytesWritten != dwBytesToWrite)
{
// Log error
hr = E_FAIL;
}
else
{
// Log success
hr = S_OK;
//_tprintf(TEXT("Wrote %d bytes to %s successfully.\n"), dwBytesWritten, argv[1]);
}
}
CloseHandle(hFile);
I am aware that the code will not compile as-is, since there are conflicting versions of unicode and non-unicode string methods. The line of interest is this one:
wchar_t array2[] = pdwFavoriteUrl;
pdwFavoriteUrl is of type PCWSTR and there is no way around it. Please help convert it to wchar_t[] (preferred) or char[].
AFAIK PCWSTR is just an alias for wchar_t* and in case it is null-terminated that the simplest thing to do would be using it to construct an object of type std::wstring. Just pass it to constructor:
PCWSTR wcstr = L"My String";
std::wstring wstr(wcstr);
and work with std::wstring objects instead of doing evil stuff such as:
wchar_t * DataBuffer = new wchar_t[wcslen(array1) + std::strlen(array2) + 1];
which will probably bring you nothing but unpleasant problems and memory leaks.
Remove
wchar_t array2[] = pdwFavoriteUrl;
and change the call to strcat to
std::strcat(DataBuffer, pwdFavoriteUrl);
(and similarly, replace array2 with pwdFavoriteUrl in the call to strlen.)
Note that PCWSTR is just
typedef const wchar_t * PCWSTR;
I am developing an application that uses the Microsoft SAPI5 speech engine. However, I have hit a wall. I've been trying to use the data from the variable that stores the input from the user so the TTS engine can repeat it. But the sapi5 speech function does not allow strings, wstrings or other types except from LPCWSTR which from my research is a pointer to a wide character string, so shouldn't it accept wstrings?
Here's some example code from msdn :
#include <stdafx.h>
#include <sapi.h>
int main(int argc, char* argv[])
{
ISpVoice * pVoice = NULL;
if (FAILED(::CoInitialize(NULL)))
return FALSE;
HRESULT hr = CoCreateInstance(CLSID_SpVoice, NULL, CLSCTX_ALL, IID_ISpVoice, (void **)&pVoice;);
if( SUCCEEDED( hr ) )
{
hr = pVoice->Speak(L"Hello world", 0, NULL);
pVoice->Release();
pVoice = NULL;
}
::CoUninitialize();
return TRUE;
}
So lets say for example i have this piece of code :
...
wstring text;
if( SUCCEEDED( hr ) )
{
wcin >> text;
hr = pVoice->Speak(text, SPF_IS_XML, NULL);
pVoice->Release();
pVoice = NULL;
}
...
But this does not work. How would I go about storing a variable that allows a LPCWSTR type?
I'm kind of new to c++ and this is the first time I've had this sort of problem, so it's very new to me.
I saw that the OP on this topic has the exact same problem : https://stackoverflow.com/questions/12292790/how-do-i-use-variables-in-sapi-tts
After around 2 hours of solid research, i found an article on msdn on converting a string to LPCWSTR format. The code is below :
std::wstring s2ws(const std::string& s)
{
int len;
int slength = (int)s.length() + 1;
len = MultiByteToWideChar(CP_ACP, 0, s.c_str(), slength, 0, 0);
wchar_t* buf = new wchar_t[len];
MultiByteToWideChar(CP_ACP, 0, s.c_str(), slength, buf, len);
std::wstring r(buf);
delete[] buf;
return r;
}
I then included this code into my project, and then created a function parameter called LPCWSTR Repeat for the TTS engine initialization function ( So that the converted string can be used in the TTS function, and the engine would say the contents of the converted string ) .
static int TTS_Speak_Dialogue(LPCWSTR Repeat)
{
// Set Sapi5 voice properties
ISpVoice * pVoice = NULL;
if (FAILED(::CoInitialize(NULL)))
return FALSE;
// Create new instance of Sapi5 once initialized in COM
HRESULT hr = CoCreateInstance(CLSID_SpVoice, NULL, CLSCTX_ALL, IID_ISpVoice, (void **)&pVoice);
if( SUCCEEDED( hr ) )
{
hr = pVoice->Speak(Repeat, SPF_IS_XML, NULL);
pVoice->Release();
pVoice = NULL;
}
::CoUninitialize();
return TRUE;
}
Then i created another function to manage the conversion and manage the user input so that the TTS engine can repeat it.
static void convert_string()
{
// Declare a string type variable
string UserInput;
// Now get input from user
cout << "Get the TTS to repeat Input : ";
cin >> UserInput;
// Convert string to LPCWSTR!
std::wstring stemp = s2ws(UserInput);
// UserInput string now converted to result
LPCWSTR result = stemp.c_str();
// Call the TTS engine function and use the converted string
TTS_Speak_Dialogue(result);
}
I hope my answer helps people who are having the same problem as I had.
I would have explained my answer in more detail but I'm in need of some sleep, so please accept my sincere apologies :-) .