[SOLVED] pointers and call functions with char[]

Projects Programming
2

I forgot :
As I wrote it in the title, I tried with pointers, but I'm not familiar with these and I only get errors.
My code :

#include <LiquidCrystal.h>
LiquidCrystal lcd(12, 13, 8, 9, 5, 11);

int x;
int y;
char *myMsg;

void setup() {
  Serial.begin(9600);
  delay(500);
  lcd.begin(16, 2);
  lcd.print("Bienvenue");
  delay(2000);
}

void loop() {
 
    int pos = 1;
    myMsg[] = "abcdefghijklmnopqrstuvwxyz1234567890";

    scroll(&myMsg,1);
 
}

void scroll(char *msg, int pos){
  
  for (x = 0; x < sizeof(msg) - 1; x++){
    
      Serial.println(sizeof(msg));
      if (x+y > sizeof(msg)-1){break;}
      
      for (y = 0; y < 16; y++){
        
        if (x+y > sizeof(msg)-1){break;}
        lcd.setCursor(y,pos);
        lcd.print(msg[x+y]);
      }
      if (x == 0) {delay(1000);}
      delay(200);
    }

    delay(1000); 
}