I can't seem to get the HitTest method of a TreeView to work. I keep getting "Invalid type" errors on the numbers that I pass to it, and then I get "Array dimensions out of bounds" errors, on the method call itself. I've converted the X & Y coordinates in the MouseDown method to twips, and then call this.HitTest(lnX,lnY) from the MouseDown method. Any ideas?

TIA