pdfGetAnnotContent
Get the content of an annotation.
char *pdfGetAnnotContent(PDFAnnotHandle annot, int *length)
This function returns the "content" of an annotation (whose handle was
obtained with
pdfGetAnnot). Only some annotation types have
content; pdfGetAnnotContent will return NULL for
annotations that don't have content.
A string is returned, and *length is filled in with the
string length. The string will be zero-terminated, but it may contain
zero bytes, depending on the current text encoding (see
pdfSetTextEncoding). The caller is responsible for freeing the
string (if non-NULL) with the pdfFreeMemory function.
C:
char *content;
int length;
content = pdfGetAnnotContent(annot, &length);
if (content) {
...
pdfFreeMemory(content);
}