Set Position to another object's X or Y

Ashley im having problems in implementing player from falling off pipes even if the player didn't want to.for my stealth game

Would it be possible to Set Position to another object's X or Y <img src="smileys/smiley1.gif" border="0" align="middle" />

Yep, use the set Position action.

ofcourse it would be convenient to be able to

Set Position relative to another object's X or Y

It would be convenient, and it's also very doable with a simple expression.

Use the action Set position, and enter whatever relative position you'd like into the X and Y boxes, such as ObjectB.X+50, ObjectB.Y-150. Alternatively, if you want the object to always be locked to another, use the Pin behaviour once you've moved ObjectA into its initial position.