Generic PDF Printer
One property makes wPDF such a universal tool:
This property is valid if you used StartPage to open a new PDF page.
If you want to close the 'Canvas', for example to draw a bitmap using DrawBitmap, execute the procedure CloseCanvas.
It will flush the stored graphics commands to the PDF Engine.
The property Canvas provides access to a TCanvas object you may use with almost any drawing
code. You can use the Canvas procedures and Windows API commands such as
Sample graphic which was drawn to the Canvas and exported to PDF. It creates an elliptical
clipping region, then rotates the pages using SetWorldTransform and prints a grid with letters.