how to hittest with z value

[zszs]

i use IHitTest to get distance, a point has z value hittest a polyline has z value ,but the result distance just computed via x and y value,does not use z to do hitttest.
how to hittest use z value.thanks

[NeilClemmons]

I don't believe there is a way through ArcObjects to do a 3D hit test but if you just want to get the distance between two geometries you can use IProximityOperator3D.

[zszs]

thanks a lot
actually,i need 3d hittest,and get the hitpoint,is there a way to solve this problem

[NeilClemmons]

As I said, I don't believe there is an ArcObjects method for doing this.  It's just math though.  A quick Google search should link you to an answer.