First step in OpenCL

Hi everybody,

I’d like to learn and practice OpenCL programming.
On a Win 7 64bits laptop.
I already have Visual Studio C++ 10.

Which release of CUDA SDK do you think I should use, 3.2 RC 2 or 4.0 RC ?

I try to figure out what I need to install from NVIDIA …

Do I have to download and install all of : cudatoolkit, gpucomputingsdk and devdrivers_notebook ?

Thanks and regards,