Will an external sustain pedal work with midi?

[CPG]

Hello, I've read through a few questions about sustain pedals, but I'm fairly new to this recording business and don't know what applies to me.

I have an old casio keyboard that has midi capability and it works fine with Pro Tools SE (I've just bought the Fast Track C400) and midi. If I plug a sustain pedal into the sustain input of my keyboard, will that then transfer to midi and allow me to sustain notes??

Thanks for any advice in advance!