enum vInfo
{
   vType,//Saving vehicles ID
   VehicleName[100],//Saving Vehicle's Name - me ownz a turismo LOLz
   Owner[MAX_PLAYER_NAME],//Saving the owner
   Float:ParkPos[3],//THis is Pos X,Pos Y,and Pos Z,equvalent of 0,1, and 2[Pos[0]-X,etc.)
   ModelID,//This is something YOU don't need,I have a different system :P
   Float:vAngle,//The angle so when the car respawns it won't spawn with some crazy angle(float(E=MC^2)):D
   Float:vHealth,//Saving vehicles health also,so if the car respawns won't be a new brand car,but will spawn with it's health
   vColor1,//Color 1
   vColor2//Color 2

}

new VehicleInfo[MAX_VEHICLES][vInfo];

if(dialogid == DIALOG_BUYVEHICLE)
    {
        if(response)
        {
            if(listitem == 0)
            {
                ShowPlayerDialog(playerid, DIALOG_CASUALVEHICLEMENU, DIALOG_STYLE_LIST, "Casual Car Menu", "TEST CAR - SENITAL", "Buy", "Cancel");
            }
        }
    return 1;
    }
    if(dialogid == DIALOG_CASUALVEHICLEMENU)
    {
        if(response)
        {
            if(listitem == 0)
            {
                new pName[45];
                new vehicleid = GetPlayerVehicleID(playerid);
                CreateVehicle(405, 540.0750,-1281.7159,17.2422,309.3207, 0, 1, 0);
                // lines added below
                VehicleInfo[vehicleid][Owner]==1;//Don't forget to add to my enumeration vOwned
                format(VehicleInfo[vehicleid][Owner],24,"%s",pName);//Sets the owner
            }
        }
        return 1;
    }

CMD:lock(playerid,params[])
{
   new vehicleid=GetPlayerVehicleID(playerid);
   if(!IsPlayerInAnyVehicle(playerid)) return SendClientMessage(playerid,COLOR_RED,"This command must be used only on a vehicle!");
   else
   {
       if(VehicleInfo[vehicleid][Owner]==0) return SendClientMessage(playerid,COLOR_RED,"This is a civilian car!");
       else
       {
            new pName[24];
            GetPlayerName(playerid,pName,24);
            if(!strcmp(pName,VehicleInfo[vehicleid][Owner]))//If the player owns the car
            {
                 SetVehicleParamsEx(vehicleid,0,0,0,1,0,0,0);
                 SendClientMessage(playerid,COLOR_GREEN,"Car locked!");
            }
            else SendClientMessage(playerid,COLOR_RED,"This is not your car!");
      }
  }
 return 1;
}

else
   {
	   if()