`pdfSetProgressProc`

BOOL32 __stdcall pdfSetProgressProc(PPDF IPDF, void* Data, TInitProgressProc InitProgress, TProgressProc Progress);

Delphi

function pdfSetProgressProc(const IPDF: PPDF; Data: Pointer; InitProgress: TInitProgressProc; Progress: TProgressProc): LongBool; stdcall;

Purpose. Register callbacks to report long-running-operation progress (e.g. during page rendering or document optimization).

Description. Verified write-only no-op. SetProgressProcH stores Data/InitProgress/Progress into FProgressData/ FProgressInitProc/FProgressProc; these three fields have exactly their declaration, the constructor's nil initialization, and this setter as their only references — none of the three registered callbacks is ever actually invoked anywhere in the codebase. No operation in this SDK reports progress through this mechanism regardless of what is registered.

Parameters.

Parameter	Description
`IPDF`	Document handle.
`Data`	Stored but never passed to any callback invocation.
`InitProgress`, `Progress`	Stored but never invoked.

Return value. True if IPDF is valid.

Remarks. Despite the ABI shape strongly implying a working progress- reporting mechanism (matching the classic API's documented behavior for long operations), no such reporting occurs in this engine — do not rely on these callbacks firing.

C# (P/Invoke)

wrappers/dotnet/LumasPdf.cs

[return: MarshalAs(UnmanagedType.Bool)]

Area

Core SDK