void main()
{
    object oPC = GetLastUsedBy();
    int nSwimBonus = 0;
    int nSwimCheck = 0;
    int nSwimResult = 0; //0=failure, 1=success
    nSwimBonus = nSwimBonus + (GetAbilityModifier(ABILITY_STRENGTH, oPC) * 2);
    nSwimBonus = nSwimBonus + (GetAbilityModifier(ABILITY_CONSTITUTION, oPC) * 2);
    nSwimBonus = nSwimBonus + GetAbilityModifier(ABILITY_DEXTERITY, oPC);
    nSwimCheck = nSwimBonus + d10(1);
    if (nSwimCheck>9)
       {
        nSwimResult = 1;
       }

    //SendMessageToPC(oPC, "Your result is " + IntToString(nSwimCheck));
    SetLocalInt(OBJECT_SELF, "SWIM_BONUS", nSwimBonus);
    SetLocalInt(OBJECT_SELF, "SWIM_RESULT", nSwimResult);
    ActionStartConversation(oPC, "", TRUE);
}