pdfSetBlockSelectMode

Select block selection mode.
void pdfSetBlockSelectMode(PDFViewerHandle viewer)
This function sets the selection mode to block selection. In this mode, the selection is a simple rectangle. Any part of the page can be selected, regardless of the content on the page.
C:
pdfSetBlockSelectMode(viewer);
pdfSetLinearSelectMode
pdfSetSelectionColor
pdfEnableSelect