The DevExpress WinForms PDF Viewer allows you to create redaction annotations within a specified PDF file region. In this example, a rectangle is drawn in the selection area. Click the Redact button to add a redaction annotation to the drawn rectangle.
Important
You need an active DevExpress Office File API Subscription or DevExpress Universal Subscription to use PDF Graphics and Facade API in production code.
Selection area coordinates are obtained through MouseUp, MouseMove, and MouseDown event handlers. Drawing the rectangle is handled within the PdfViewerControl.Paint event handler. A PdfDocumentFacade instance of the active page is obtained in the ButtonClick event handler. A AddRedactAnnotation method call generates a redaction annotation over the rectangle. An ApplyRedactAnnotations method call applies the annotation.
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