image uploading

in my site i have form to upload image
this image may be very big or very small
after user upload this image i want make some imagte prossessing as
1- i want to make two image from the original image
2- the first image have (50*50) cordinate
3- the secode image have (200*200) as max hight and max wiedth
4-i want for each image to take new name

u can see example in this site

u can see tow image one small and one big

how can do as this in my site
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better use free component SImageUtil.dll
You can find it here: called Simage
all examples of using are there too

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