function XfaBStrHelpersAvailable: Boolean;
Returns True when XFA BSTR helper exports are present in the loaded PDFium DLL.
XFA support requires a special PDFium build with FPDFXFA_* exports; without it, XFA documents render as the static fallback only.
Class function; checks the DLL for the symbols at runtime.
IsTagged is False).
if Pdf1.Active and Pdf1.XfaBStrHelpersAvailable then
Memo1.Lines.Add('XfaBStrHelpersAvailable = True')
else
Memo1.Lines.Add('XfaBStrHelpersAvailable = False');