function FindFirst(const Text: WString; Options: TSearchOptions= []; StartIndex: Integer= 0; DirectionUp: Boolean= True): Integer;
Initiates a text search on the current page. Call this method before using FindNext or FindPrevious to iterate through subsequent matches. Each call to FindFirst resets the internal search handle.
To highlight all occurrences visually without iterating, use HighlightSearchText instead.
var Pos: Integer;
begin
Pos := PdfView.FindFirst('invoice', [soMatchCase]);
while Pos >= 0 do
begin
Memo1.Lines.Add('Found at index: ' + IntToStr(Pos));
Pos := PdfView.FindNext;
end;
end;