Problem using Media Player Activex

Hi all
I am finding difficulties using Media Player Control.First of all I tell what i want to do.

I want a software which could play some media files one by one with resolution of 720*576 . no matter what the dimention of original files are.

So if I set "StretchToFit" property it leaves some kind of black border in the surroundings .Documentation they says Media Player does it to save Quality.But Is There some way to get 720*576 witthout small black border in the surroundings.
thanx