[TheNerka]

Code:

new iVehicleID = GetPlayerVehicleID(playerid), iMsg[120];
        if(OwnedVeh(iVehicleID) != 0)
        {
            if(strmatch(vInfo[OwnedVeh(iVehicleID)][vOwner], "Unbought"))
            {
                format(iMsg, sizeof(iMsg), "Hello do you want buy this vehicle?\nCost: %iЂ", vInfo[OwnedVeh(iVehicleID)][vPrice]);
                ShowPlayerDialog(playerid, 50000, DIALOG_STYLE_MSGBOX, "Vehicle buy", iMsg, "Yes", "No");
                //TogglePlayerControllable(playerid, false);
            }
            else if(strmatch(vInfo[OwnedVeh(iVehicleID)][vOwner], pName(playerid)))
            {
                format(iMsg, sizeof(iMsg), "Vehicle control [Numpad 4]");
                SendClientMessage(playerid, COLOR_RED, iMsg);
            }
            else if(strmatch(vInfo[OwnedVeh(iVehicleID)][vOwner], pName(playerid)) || vInfo[OwnedVeh(iVehicleID)][vLocked] == 1)
            {
                format(iMsg, sizeof(iMsg), "This car is locked. Vehicle owner %s!", vInfo[OwnedVeh(iVehicleID)][vOwner]);
                SendClientMessage(playerid, -1, iMsg);
                RemovePlayerFromVehicle(playerid);
            }
            else if(strmatch(vInfo[OwnedVeh(iVehicleID)][vOwner], pName(playerid)) || vInfo[OwnedVeh(iVehicleID)][vLocked] == 0)
            {
                format(iMsg, sizeof(iMsg), "This car is not locked. Vehicle owner %s", vInfo[OwnedVeh(iVehicleID)][vOwner]);
                SendClientMessage(playerid, -1, iMsg);
            }
            else
            {
                format(iMsg, sizeof(iMsg), "Vehicle owner: %s", vInfo[OwnedVeh(iVehicleID)][vOwner]);
                SendClientMessage(playerid, -1, iMsg);
                RemovePlayerFromVehicle(playerid);
            }
        }

Code:

stock strmatch(const String1[], const String2[])
{
        if ((strcmp(String1, String2, true, strlen(String2)) == 0) && (strlen(String2) == strlen(String1)))
        {
                return true;
        }
        else
        {
                return false;
        }
}

Does't show dialog, "Hello do you want buy this vehicle?" SQL no problem