`pdfSetAnnotOpacity`

Set an annotation's /CA (constant opacity) value.

BOOL32 __stdcall pdfSetAnnotOpacity(PPDF IPDF, uint32_t Handle, double Value);

Delphi

function pdfSetAnnotOpacity(const IPDF: PPDF; Handle: Cardinal; Value: Double): LongBool; stdcall;

Purpose. Set an annotation's /CA (constant opacity) value.

Parameters.

Parameter	Description
`IPDF`	Document handle.
`Handle`	Document-wide annotation handle.
`Value`	Opacity, `0.0..1.0`.

Return value. True if Handle resolves; False otherwise.

C# (P/Invoke)

wrappers/dotnet/LumasPdf.cs

[return: MarshalAs(UnmanagedType.Bool)]

Area

Annotations