Cheking for obstacles

Hi,

How can I check if there is an obstacle between point A and point B and based on that check execute or not execute an action?

Thanks

I think this is a good starting point:

scirra.com/forum/c2enemy-line-of-sight_topic45095.html

It places a sprite as a line between the 2 points, using it to detect overlap with any obstacles.

Thank you for your help, but I already solved it :)