IDebugProperty3::GetStringChars
Retrieves the string associated with this property and stores it in a user-supplied buffer.
HRESULT GetStringChars(
ULONG buflen,
WCHAR* rgString,
ULONG* pceltFetched
);
int GetStringChars(
uint buflen,
out string rgString,
out uint pceltFetched
);
Parameters
buflen
[in] Maximum number of characters the user-supplied buffer can hold.rgString
[out] Returns the string.[C++ only], rgString is a pointer to a buffer that receives the Unicode characters of the string. This buffer must be at least buflen characters (not bytes) in size.
pceltFetched
[out] Where the number of characters actually stored in the buffer is returned. (Can be NULL in C++.)
Return Value
If successful, returns S_OK; otherwise returns an error code.
Remarks
In C++, care must be taken to insure that the buffer is at least buflen Unicode characters long. Note that a Unicode character is 2 bytes long.
Note
In C++, the returned string does not include a terminating null character. If given, pceltFetched will specify the number of characters in the string.
Example
CStringW RetrievePropertyString(IDebugProperty2 *pPropInfo)
{
CStringW returnString = L"";
CComQIPtr<IDebugProperty3> pProp3 = pPropInfo->pProperty;
If (pProp3 != NULL) {
ULONG dwStrLen = 0;
HRESULT hr;
hr = pProp3->GetStringCharLength(&dwStrLen);
if (SUCCEEDED(hr) && dwStrLen > 0) {
ULONG dwRead;
CStrBufW buf(returnString,dwStrLen,CStrBuf::SET_LENGTH);
hr = pProp3->GetStringChars(dwStrLen,
reinterpret_cast<WCHAR*>(static_cast<CStringW::PXSTR>(buf)),
&dwRead);
}
}
return(returnString);