Mobile

std::vector<wchar_t> v;
v.push_back(L'a');
v.push_back(L'b');
v.push_back(L'c');
assert(v.size() == 3);
v.clear();
assert(v.size() == 0);
assert(v.capacity() >= 3);

v.push_back(L'a');
std::wstring s(L" test");
v.insert(v.end(), s.begin(), s.end());
v.push_back(0);
::MessageBox(0, &v[0], _T("test"), 0);

std::vector<wchar_t> v;

From MSDN
ppvBits 
[in] Pointer to a variable that receives a pointer to the location of the device-independent bitmap’s bit values.
....
Return Values
A handle to the newly created device-independent bitmap indicates 
success, and *ppvBits points to the bitmap’s bit values. 

NULL indicates failure, and *ppvBits is NULL. 

To get extended error information, call GetLastError.