`pdfGetDocInfoEx`

Enumerate document-info entries by index.

Category	Document metadata
Note	`Key` is always `NULL` — see the chapter note

Purpose — Enumerate document-info entries by index.

Declarations

int32_t __stdcall pdfGetDocInfoEx(PPDF IPDF, uint32_t Index, TDocumentInfo* DInfo, const char* Key, const char* Value, BOOL32* Unicode);

Delphi

function pdfGetDocInfoEx(const IPDF: PPDF; Index: Cardinal; var DInfo: TDocumentInfo; var Key, Value: PAnsiChar; var Unicode: LongBool): Integer; stdcall; external 'LumasPdf.dll';

Parameters

Parameter	Type	Description
`IPDF`	`PPDF`	Instance handle.
`Index`	`Cardinal`	Zero-based index, `0 .. pdfGetDocInfoCount-1`. Enumeration order follows the underlying dictionary's iteration order, not insertion order.
`DInfo`	`TDocumentInfo*`	Receives the ordinal.
`Key`	`PAnsiChar*`	Always `NULL` — see the chapter note (no per-entry custom key is stored).
`Value`	`PAnsiChar*`	Receives the value, UTF-8 encoded.
`Unicode`	`BOOL32*`	Always `FALSE` — the value is always returned as UTF-8 regardless of how it was set (`A` or `W`).

Return value — Value length in bytes on success, 0 if Index is out of range or the handle is invalid.

Memory & buffers — Value points at an engine-owned buffer valid until the next call to this function.

See also — pdfGetDocInfo

C# (P/Invoke)

wrappers/dotnet/LumasPdf.cs

public static extern int pdfGetDocInfoEx(IntPtr IPDF, uint Index, ref TDocumentInfo DInfo, ref IntPtr Key, ref IntPtr Value, [MarshalAs(UnmanagedType.Bool)] ref bool Unicode);

Area

Core SDK