I used PlotXY in the graph control with cursor attribute of '"sanp to point" and produced a plot. Everything is OK before popup a pop-up panel. After the pop-up panel removed, the cursor can't snap to any point of the plot. I tried "SetPlotAttribute (... ATTR_PLOT_SNAPPABLE, 1)","SetPlotAttribute (..., ATTR_PLOT_ZPLANE_POSITION, 0)", they don't work. I don't know how to solve this problem. I need your help!
