How to initialize SoftwareSerial in a class in a new Library

This might be a silly question but I have forgotten my C/C++ classes a long time ago. I am trying to create a library for my GPRS shield and I want to include the SoftwareSerial object inside the new object I will be creating. The header file would include I presume the declaration of the class member:

class SMS
{
  public:
    SMS();
    void begin();
    SoftwareSerial smsSerial;
    
  private:  
  
}

The constructor for SoftwareSerial have to be passed the RX and TX pins. And I want these to be parameters of a function, maybe begin:

SMS::SMS()
{
  smsFlags = B00000000;
}

void SMS::begin(int rxPin, int txPin)
{
  smsSerial = new SoftwareSerial(rxPin,txPin); //<---- Is this what I'm supposed to do?
}

Not sure if I should use “new” or not.

Bump

Two ways :

Dynamically

class SMS {
 public:
   SMS();
   ~SMS();
   void begin(uint_8 rxPin, uint_8 txPin, long speed);
   
 private:  
   SoftwareSerial *smsSerial;
   int smsFlags; ??? 
}

SMS::SMS() {
  smsFlags = B00000000;
  smsSerial = NULL;
}
SMS::~SMS() {
  if(smsSerial != NULL) free(smsSerial);
}
void SMS::begin(uint_8 rxPin, uint_8 txPin, long speed)
{
 smsSerial = new SoftwareSerial(rxPin,txPin);   // it return a pointer to a SoftwareSeril object
 smsSerial->begin(speed);
}

Statically

class SMS {
 public:
   SMS();
   void begin(uint_8 rxPin, uint_8 txPin, long speed);
   
 private:  
   SoftwareSerial smsSerial;
   int smsFlags; ??? 
}

SMS::SMS(){
  smsFlags = B00000000;
}
void SMS::begin(uint_8 rxPin, uint_8 txPin, long speed) : smsSerial (rxPin, txPin)
{
 smsSerial.begin(speed);
}