RBCFrameFromExisting srcImg rbc (win.canvasCurrentImage.Children.[currentCanvas] :?> Views.RBCFrame)
else
let f = RBCFrame srcImg rbc
RBCFrameFromExisting srcImg rbc (win.canvasCurrentImage.Children.[currentCanvas] :?> Views.RBCFrame)
else
let f = RBCFrame srcImg rbc