TCAD is a component that will help you write vector graphics applications. Shapes can be interacted with by mouse or code. It is easy to use, effective and powerful. It will save you valuable time.
Drawing shapes on the designer canvas by mouse actions or code.
Modifying the drawed shapes.
Support multi-layers, printing/deleting/visible invisible layer(s).
Using all colors possible.
Using different style of pens ,different style of brushes if you need.
Creating text objects with any font installed in the system.
Necessarily shape action related events published.
Using page formats like (A0,A1,A2,A3,A4,letter, etc.) or custom sizes.

Undo actions
Cutting, copying, pasting and deleting the shapes.
Sendtoback,Bringtofront all or by a step.
Ordering the shapes(SendToBack, BringToFront, etc.)
Rotating, Dragging and Scaling the shapes by mouse or code.
Aligning the shape in any style.
Easy to create user-define combine shape
Snapping the mouse point to grids,shape outline.
Powerful inspector
Locking/Unlocking Shape
Showing HotSpot of a shape or hiding.
Grouping and ungrouping the shapes.
Zooming and panning, viewing the drawing in any scale.
Showing hints when mouse enter a shape.
Easy to create your library with [Library creating tool(GUI)] ;
Dynamic link line supported , using mouse or code, like VISIO;
Support line crossing and line breaking;
Support 24 gradient style fill mode
Saving the drawing as disk file or stream(database) and opening it.
Printing the drawing to the printer and/or plotter.
Inserting bitmaps to the drawing.
Scaling, rotating,dragging bitmaps like a shape.
Exporting the drawing as WMF,bitmap,Jpg,dxf file.
and more function........