How to draw a line with arrow head

Hi,
I have an application where i need to connect different
components by line. I am able to connect the components by line but
i dont know how i can add arrow to the line head or one end of
line. When i drag line from a souce component to destination the
line end at destination must have a pointed head i.e arrow.
If any one have solution please reply..
Thank you.

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How to draw a line with arrow head

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