Hello Robert, >Like so? > >dim myPt.4 > >then myPt.h=x myPt.v=y? > >So as to yield CALL PtInRgn (myPt,RegionToLive&) ? I like to use FBII's built-in flexibility for this: DIM myPt.4;0,x,y >Also, how would I designate individual vertices for some of the polygon >structures that Quickdraw allows, which are also in similar format? Same >way? Yep. DIM ptA.4;0,Ax,Ay DIM ptB.4;0,Bx,By DIM ptC.4;0,Cx,Cy 0"0 =J= a y "