LumasAPI reference › Import & Output APIs
pdfSetColDefFile
Designate an embedded file (1-based attachment handle, see
Purpose — Designate an embedded file (1-based attachment handle, see E03) as the portfolio's initial/definition document.
Description — Requires that a collection was created first (pdfCreateCollection); the handle must reference an existing attachment.
C
BOOL32 __stdcall pdfSetColDefFile(PPDF IPDF, uint32_t EmbFile);Return value — TRUE; FALSE when no collection exists or the handle is out of range.
C# (P/Invoke)
wrappers/dotnet/LumasPdf.cs
[return: MarshalAs(UnmanagedType.Bool)]Area
Import & Output APIs
Category
Setters
Exported names
pdfSetColDefFile
String variants
The …A form takes UTF-8, …W
takes UTF-16; a bare name aliases the ANSI form.
See working code
Worked examples — complete programs in ten languages.