Does a course withdrawal hurt grad school applications?

[absurdist]

Ok so I was interested in programming and took up this C++ course which I withdrew from since I was taking too many credits. If I plan to apply to a top grad school (phd hopefully) does thw W on my transcript look bad? Also I now have experience with VB and MATLAB so do you think these are enough or should also I retake the C++ course to get rid of the W?
Also are there any benefits of learning C++? I've heard it gives you an edge when it comes to employment.

 

[wukunlin]

C++ quite fast comparing to languages like java and python

for the purpose of numerical simulations at least one of C/C++/Fortran would be a good idea.

I don't remember the last time I heard anyone using VB (but then I don't specialize is computer science...)

MATLAB is quite handy but it definitely isn't as robust as languages stated above, iirc when you have a whole loads of data to work with it can get quite sluggish as well.