Put multiple values in a single attribute of a struct - c++

Question

I need put multiple values ​​in a single attribute of a struct, the attribute that will receive the values ​​is LPSTR, I was trying to pass all this as a vector, compile, but it does not work as I would like.
My struct:
typedef struct _wfs_pin_caps
{
WORD wClass;
WORD fwType;
............More...............
BOOL bIDConnect;
WORD fwIDKey;
WORD fwValidationAlgorithms;
WORD fwKeyCheckModes;
LPSTR lpszExtra; //This attribute must receive more than one value
} WFSPINCAPS, * LPWFSPINCAPS;
As I'm trying to do:
HRESULT WINAPI WFPGetInfo(HSERVICE hService, DWORD dwCategory, LPVOID lpQueryDetails, DWORD dwTimeOut, HWND hWnd, REQUESTID ReqID) {
...
result = WFMAllocateMore(sizeof(WFSPINCAPS), lpWFSResult, &lpWFSResult->lpBuffer);
...
//This Values
vector<LPSTR> Tokens;
Tokens[1] = (LPSTR)"Value1";
Tokens[2] = (LPSTR)"Value2";
Tokens[3] = (LPSTR)"Value4";
Tokens[4] = (LPSTR)"Value5";
PinCapabilities.lpszExtra = (LPSTR)&Tokens; //Pass HERE
memcpy(lpWFSResult->lpBuffer,&PinCapabilities,sizeof(WFSPINCAPS));
...
return WFS_SUCCESS;

Answer 1

Your question is very unclear, but if I understand it, the problem is that you are setting lpszExtra to a local vector Tokens (stored in the stack) and that will be destroyed at the end of that function.
One way would be creating the vector in the heap like this:
// Create a new vector in the heap of 5 elements (0..4)
vector<LPSTR> &Tokens = *new vector<LPSTR>(5);
Tokens[1] = (LPSTR) "Value1";
Tokens[2] = (LPSTR) "Value2";
Tokens[3] = (LPSTR) "Value4";
Tokens[4] = (LPSTR) "Value5";
PinCapabilities.lpszExtra = (LPSTR) &Tokens; //Pass HERE
// Assuming that lpBuffer has room for a WFSPINCAPS structure
memcpy(lpWFSResult->lpBuffer, &PinCapabilities, sizeof(WFSPINCAPS));
Now the ((LPWFSPINCAPS)lpWFSResult->lpBuffer)->lpszExtra contains a valid pointer to a vector that can be used in any other function like this:
LPWFSPINCAPS pPinCapabilities = (LPWFSPINCAPS) lpWFSResult->lpBuffer;
vector<LPSTR> &Tokens = *(vector<LPSTR> *) pPinCapabilities->lpszExtra;
LPSTR str = Tokens[3]; // Will get "Value4"
But don't forget that in some point you will have to release the vector's memory:
LPWFSPINCAPS pPinCapabilities2 = (LPWFSPINCAPS) lpWFSResult->lpBuffer;
delete (vector<LPSTR> *) pPinCapabilities2->lpszExtra;
And please next time try to create a Minimal, Complete, and Verifiable example to help us to help you.