Call contract and send value from Solidity

Question

I have a pre-deployed contractA with known ABI. I would like to call function func1(string,string) in the contractA (and pass the arguments) from a new contractB and send some value at the same time. So far, I managed to write the following (which does not send the arguments properly):

    contract contractB is mortal  {
        function invokeContractA() { 
            address contractAaddress= 0x1234567891234567891234567891234567891234;
            uint ValueToSend = 1234;
            contractAaddress.call.value(ValueToSend)(bytes4(sha3("func1(string,string)")),
                 "arg1TEXT", "arg2TEXT");
        }  
    }

Would appreciate your suggestions on what else is missing here (perhaps, need to convert the arguments into bytecode somehow?).

Answer 1

Here's an approach that's simpler and checked by the compiler:

contract contractA {
    function blah(int x, int y) payable {}
}

contract contractB {
    function invokeContractA() { 
        contractA a = contractA(0x1234567891234567891234567891234567891234);
        uint ValueToSend = 1234;
        a.blah{value: ValueToSend}(2, 3);
    }  
}

Answer 2

A more modern style, as the last answer has gone a bit out of date:

(tokenInAfterFee, tokenOutAmt) = spclContract.swap{value: msg.value}(_spctToSwap);

(edit: the accepted answer was edited after I posted this to match mine. Not sure that's a good idea, it's good to have access to old code as well... Anyways...)