OnKeyPress event

Fires for each character generated by the keyboard. The Sender parameter references the TPdfView instance that raised the event, so a single handler can serve several views by inspecting Sender

Typical uses include filtering or reshaping typed characters before they reach text-selection or form-field handlers. Because the handler runs on the VCL main thread, you can update form controls and call other VCL APIs directly

Handlers should return promptly, because PDFium rendering and form filling occur on the same thread, and any delay here pushes back the next page repaint

• Set TabStop to True if you want this control to take part in tab-key focus traversal so that keyboard events are delivered
• When you assign this event at design time the IDE generates a stub procedure on the form; you can also assign it at run time with PdfView1.OnKeyPress := MyHandler
• Combine it with the matching Set Cursor / Set Caret calls on TPdfView to keep visual feedback in sync