DeleteMarkerAt example for C++ Builder
void __fastcall TForm1::DeleteMarkerAtClick(TObject *Sender)
{
LEADImage1->Load ( "e:\\image1.jpg", 0, 0, 1 );
LEADMarker1->LoadMarkers ( "e:\\image1.jpg", 0 );
LEADMarker1->GetMarker ( 0 );
LEADMarker1->DeleteMarkerAt ( 0 );
LEADImage1->SetMarkers ( LEADMarker1, 0 );
LEADImage1->Save ( "e:\\image2.jpg", FILE_EXIF_JPEG, 24, 2, 0 );
}