TPdfAnnotationLinkType = (
altUnsupported = PDFACTION_UNSUPPORTED, // Unsupported action type.
altGoto = PDFACTION_GOTO, // Go to a destination within current document.
altRemoteGoto = PDFACTION_REMOTEGOTO, // Go to a destination within another document.
altURI = PDFACTION_URI, // Universal Resource Identifier, including web pages and
// other Internet based resources.
altLaunch = PDFACTION_LAUNCH, // Launch an application or open a file.
altEmbeddedGoto = PDFACTION_EMBEDDEDGOTO // Go to a destination in an embedded file.
);