If you want to perfectly align to a grid you need to work out each position in pixels then translate each into a powerbuilder units
x and width.properties are the nearest PB X Unit to a pixel.
The formula is 4, 4, 5 .units per pixel. An approximation is ROUND( pixel * 4.57291,0) or use PixelstoUnits ( pixel, XPixelsToUnits! )
So if you wanted 800, 1600, 2400 alignment x'es then make it 175, 350, 525 pixels... but translate into pbunits on the fly.