func init
	// checks installation Adobe Acrobat
	include("AdobeAcrobat")

	if(linked("onError"))
		this.setfield('ex', 'ex' + this.id)
	end
end

func make_replace(src, dst, st, num)
	return(dst + '.ReplacePages(' + 
		this.props("StartPage").value + ', ' + 
		src + ', ' + 
		(len(st) ? st : this.props("StartSourcePage").value) + ', ' + 
		(len(num) ? num : this.props("NumPages").value) + ', ' + 
		(isdef("MergeTextAnnotations") ? 0 : '-1' ) + 
		')')
end

func doReplacePages(data)
	src = d("Source")
	dst = d("Destination")
	st = d("StartSourcePage")
	num = d("NumPages")
	if(len(src) and len(dst))
		linked("onError") ? blk.println('try {').inc() : ''
			if(linked("onResult"))
				event("onResult", make_replace(src, dst, st, num))
			else
				blk.println(make_replace(src, dst, st, num), ';')
			end
		if(linked("onError"))
			blk.dec().println('} catch(Exception ', this.ex, ') {').inc()
				event("onError", this.ex + '.Message')
			blk.dec().println('}')
		end
	end
end