RenderPageLayerToFile

Rendering, annotations, form fields, file output

Renders one page layer directly to a PNG file

Syntax

function RenderPageLayerToFile(DPI: Double; Page, LayerKind: Integer;
  const FileName: WideString): Integer;

Parameter	Description
`DPI`	Positive output resolution in dots per inch
`Page`	1-based page number
`LayerKind`	`0` selects base page content, `1` annotations, `2` form fields, and `3` all interactive objects
`FileName`	Destination PNG path

Returns 1 on success, 0 for invalid input or rendering failure, and 2 when the output file cannot be created

The output format is always PNG so annotation-only and form-only results can retain transparent backgrounds for later composition