pdfGetBorderStyle

int32_t __stdcall pdfGetBorderStyle(PPDF IPDF);
BOOL32 __stdcall pdfSetBorderStyle(PPDF IPDF, int32_t Style);

function pdfGetBorderStyle(const IPDF: PPDF): Integer; stdcall;
function pdfSetBorderStyle(const IPDF: PPDF; Style: Integer): LongBool; stdcall;

Purpose. Set/get a document-global default annotation border style, consulted as the fallback when an annotation-creation call doesn't specify its own border style explicitly.

Return value. Getter: the current default; 0 if IPDF invalid. Setter: True if IPDF valid.

C# (P/Invoke)

public static extern int pdfGetBorderStyle(IntPtr IPDF);