[C++]C++ Create GUID
在C++中若有建立GUID的需求，可先建立GUID的物件實體，透過CoCreateGuid API填寫GUID到GUID的物件實體，再透過UuidToString API將GUID轉為字元陣列，像是下面這樣：
wstring GetGUID()
{
_TUCHAR *guidStr = NULL;
GUID *pguid = new GUID;
CoCreateGuid(pguid);
// Convert the GUID to a string
UuidToString(pguid, (RPC_WSTR*)&guidStr);
delete pguid;
return wstring(guidStr);
}
完整的範例如下：
// ConsoleApplication5.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include <objbase.h>
#include <string>
using namespace std;
wstring GetGUID()
{
_TUCHAR *guidStr = NULL;
GUID *pguid = new GUID;
CoCreateGuid(pguid);
// Convert the GUID to a string
UuidToString(pguid, (RPC_WSTR*)&guidStr);
delete pguid;
return wstring(guidStr);
}
int _tmain(int argc, _TCHAR* argv[])
{
wstring guid = GetGUID();
wprintf(guid.c_str());
return 0;
}
運行起來會像下面這樣：
若建置時Link不過，可以檢查一下Additional Dependencies設定，需確保Rpcrt4.lib與Ole32.lib有設定在裡面，詳細的可參閱MSDN說明。
