Arrow rotation

[right][font=Times New Roman][size=3]Hi every one……[/size][/font][/right]

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[font=Times New Roman][size=3]I attached a file that’s consisted of three objects….[/size][/font]

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[font=Times New Roman][size=3]1-the blue square, called “mineobject”….it’s the object I control on it (by keyboard)[/size][/font]

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[font=Times New Roman][size=3]2-the red circle, called “otherobject”……it’s the object sliding to the left direction, I haven’t control on it[/size][/font]

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[font=Times New Roman][size=3]3-the green arrow, it’s movement binding with the moving of the blue square that I can control on it….[/size][/font]

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[font=Times New Roman][size=3]The desire :[/size][/font]

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[font=Times New Roman][size=3]I want the arrow get rotation to refer to the red circle…. There are too many files talking about this…but when we control on object by mouse only…in this we control the referring operate without mouse……………[/size][/font]

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[font=Times New Roman]Can any one help me…………………… [/font]