get pdf page with highlight

i am trying to get a page that has a highlight, but it is returning nil,


struct PDFV_POS pos;
PDFVPage *vpage = [mview vGetPage : pos.pageno];
PDFPage * page = [vpage GetPage];
if( page )
{
PDFAnnot * annot = [page annotAtPoint:pos.x :pos.y];
[annot type];
[annot removeFromPage];
annot = nil;
}

when i put a break point it shows that page = nil,

Hi,

also PDFV_POS needs some values.
something like:

struct PDFV_POS pos;
pos.x = 0;
pos.y = 0;
pos.pageno = 5;