function FormObjectChildren(Index: Integer): TPdfPageObjectInfos;
| Index | Integer. Zero-based index of a page object whose ObjectType is otForm. A different type raises EPdfError. |
| Result | TPdfPageObjectInfos. Array of TPdfPageObjectInfo records, one per child object, in the drawing order of the form. |
A Form XObject (ISO 32000-1 8.10) is a self-contained content stream that the page paints as one object - the usual container for reused artwork, imported pages, and flattened annotation appearances. Its children are invisible to the page-level object list, so this is the only way to inspect what such an object actually draws
Each child is described by the same record PageObjectInfo returns, including a Handle that can be passed to InsertObjectAtIndex
Child coordinates are expressed in the form space of the parent object, so the parent Matrix has to be applied before comparing them with page coordinates