`pdfCompareOutlines`

Duplicate an outline node's attached action onto a new/other

int32_t __stdcall pdfCloneOutlineAction(PPDF IPDF, int32_t OutlineID);
int32_t __stdcall pdfCompareOutlines(PPDF IPDF, int32_t FirstOutlineID, int32_t SecondOutlineID);
int32_t __stdcall pdfGetOutlineObjectNumber(PPDF IPDF, int32_t OutlineID);

Delphi

function pdfCloneOutlineAction(const IPDF: PPDF; OutlineID: Integer): Integer; stdcall;
function pdfCompareOutlines(const IPDF: PPDF; FirstOutlineID, SecondOutlineID: Integer): Integer; stdcall;
function pdfGetOutlineObjectNumber(const IPDF: PPDF; OutlineID: Integer): Integer; stdcall;

Purpose. Duplicate an outline node's attached action onto a new/other node (pdfCloneOutlineAction); compare two outline nodes structurally (pdfCompareOutlines); resolve an outline node's underlying PDF object number (pdfGetOutlineObjectNumber, useful for cross-referencing against low-level object-level APIs elsewhere in the ABI).

Parameters.

Parameter	Description
`IPDF`	Document handle.
`OutlineID` / `FirstOutlineID`/`SecondOutlineID`	Bookmark handle(s).

Return value. pdfCloneOutlineAction: the resulting handle/identifier on success; 0 if IPDF invalid or OutlineID unresolved. pdfCompareOutlines: a comparison result code (not independently re-verified as to exact semantics — e.g. equal/different/ordering — beyond confirming the call is real, not a stub); -1 if IPDF is invalid. pdfGetOutlineObjectNumber: the object number; 0 if IPDF invalid or OutlineID unresolved.

C# (P/Invoke)

wrappers/dotnet/LumasPdf.cs

public static extern int pdfCompareOutlines(IntPtr IPDF, int FirstOutlineID, int SecondOutlineID);

Area

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