C++ 不定参数"..."的使用

#include <iostream>
#include <cstdio> 
#include <cstdarg>
 
#define LEN_MSG_BUFFER        128

using namespace std;
   
void Message(int nLevel, const char *szFormat, ...)
{
    char* szData = new char[LEN_MSG_BUFFER]();
    try
    {
        va_list args;
        va_start(args, szFormat);
        vsnprintf(szData, LEN_MSG_BUFFER, szFormat, args);
        va_end(args);
    } catch( ... ) {  cout << "Error ..." << endl;}
    cout << szData << endl;
    delete[] szData;
}

int main()
{    
    Message(1,"Messages(%s), Code(%d).", "Test '...' .", 0);
     //system("pause");
    return 0;
}

//OUTPUT: Messages(Test '...' .), Code(0).