Can someone enlighten me ? #define TREE_XYWH(tree) tree[0].ob_x-3,tree[0].ob_y-3,tree[0].ob_width+6,tree[0].ob_height+6 . . objc_draw(dlog, start, MAX_DEPTH, TREE_XYWH(dlog)); I thought that the macro above would be inserted into the second line before it was compiled but I am getting this error. newsaes.c:651:52: error: macro "objc_draw" requires 7 arguments, but only 4 given Peter