IDebugProperty3::GetStringCharLength
Returns the number of characters in the associated property's string.
HRESULT GetStringCharLength(
ULONG *pLen
);
int GetStringCharLength(
out uint pLen
);
Parameters
Parameter |
Description |
|---|---|
pLen |
[out] Returns the number of characters in the property's string. |
Return Value
If successful, returns S_OK; otherwise returns error code.
Remarks
Typically, this method is used as a prelude to allocating a buffer for a call to the IDebugProperty3::GetStringChars method.
Example
The following example shows how to implement this method for a CProperty object that exposes the IDebugProperty3 interface.
STDMETHODIMP CProperty::GetStringCharLength(ULONG *pLen)
{
HRESULT hr = E_INVALIDARG;
EVALFLAGS oldEVALFLAGS = m_EVALFLAGS;
m_EVALFLAGS &= ~EVAL_NOFUNCEVAL;
if (pLen)
{
DEBUG_PROPERTY_INFO dpInfo;
dpInfo.bstrValue = NULL;
ULONG ulen = 0;
hr = GetPropertyInfo(DEBUGPROP_INFO_VALUE,10,DEFAULT_TIMEOUT,NULL,0,&dpInfo);
if (hr == S_OK && dpInfo.bstrValue)
{
if (wcscmp(dpInfo.bstrValue,L"Nothing") == 0)
{
ulen = 0; //VSWhidbey#64815
}
else
{
ulen = ::SysStringLen(dpInfo.bstrValue);
if( ulen > 2 &&
dpInfo.bstrValue[0] == L'"' &&
dpInfo.bstrValue[ulen-1] == L'"')
{
ulen = ulen > 2 ? ulen - 2 : ulen; //remove two double quotes
}
}
}
::SysFreeString(dpInfo.bstrValue);
*pLen = ulen;
}
m_EVALFLAGS = oldEVALFLAGS;
return hr;
}