Comment by ndiddy

Drag-and-drop visual design is the best possible approach until you add the constraint that the window has to be resizable. Then it turns into endlessly messing with the anchoring and resizing settings for each individual widget, and whenever you add/remove a widget or change the form layout you have to mess with everything again. The best experience I've had with UI development is on Palm OS, simply because all devices have the same 160x160 logical resolution and all software runs in fullscreen. You never have to worry about resizing anything so drag-and-drop design with everything just placed on absolute coordinates becomes feasible.