`pdfCreateHideAction`

Create an action that shows or hides a form field.

Exported names	`pdfCreateHideAction`

Purpose — Create an action that shows or hides a form field.

Description — Registers action kind 6 with the target field handle in GotoPg and the hide/show flag in a (1=hide, 0=show — the field becomes visible when triggered with Hide=FALSE).

Declarations

int32_t __stdcall pdfCreateHideAction(PPDF IPDF, uint32_t AField, BOOL32 Hide);

Delphi

function pdfCreateHideAction(const IPDF: PPDF; AField: Cardinal; Hide: LongBool): Integer; stdcall; external 'LumasPdf.dll';

Parameters

Parameter	Type	Description
`IPDF`	`PPDF`	Instance handle.
`AField`	`Cardinal`	Target form-field handle.
`Hide`	`BOOL32`	`TRUE` = hide the field when triggered; `FALSE` = show it.

Return value — 1-based action handle (> 0), or 0 on an invalid handle. AField is not validated against the field table at creation time.

C# (P/Invoke)

wrappers/dotnet/LumasPdf.cs

public static extern int pdfCreateHideAction(IntPtr IPDF, uint AField, [MarshalAs(UnmanagedType.Bool)] bool Hide);

Area

Core SDK