Verify Page Links

private void verifyPageLinksToolStripMenuItem_Click(object sender, EventArgs e)
{
	if (pdfCtl.Doc == null)
		return;
	uint GoTo = pxsInst.StrToAtom("GoTo");
	uint GoToR = pxsInst.StrToAtom("GoToR");
	uint Launch = pxsInst.StrToAtom("Launch");
	uint invalidCount = 0;
	for (uint i = 0; i < pdfCtl.Doc.CoreDoc.Pages.Count; i++)
	{
		PDFXEdit.IPXC_Page page = pdfCtl.Doc.CoreDoc.Pages[i];
		uint annotsCount = page.GetAnnotsCount();
		for (uint j = 0; j < annotsCount; j++)
		{
			PDFXEdit.IPXC_Annotation annot = page.GetAnnot(j);
			PDFXEdit.IPXC_ActionsList actions = annot.get_Actions(PDFXEdit.PXC_TriggerType.Trigger_Up);
			for (uint k = 0; k < actions.Count; k++)
			{
				if ((actions[k].Type == GoTo) || (actions[k].Type == GoToR))
				{
					PDFXEdit.IPXC_Action_Goto actionGoTo = (PDFXEdit.IPXC_Action_Goto)actions[k];
					if (actionGoTo.IsValid == false)
					{
						invalidCount++;
					}
					else if (actions[k].Type == GoToR)
					{
						PDFXEdit.IPXC_FileSpec path = actionGoTo.Target;
						if (File.Exists(path.DIPath) == false)
							invalidCount++;
					}

				}
				else if (actions[k].Type == Launch)
				{
					PDFXEdit.IPXC_Action_Launch actionLaunch = (PDFXEdit.IPXC_Action_Launch)actions[k];
					if (actionLaunch.IsValid == false)
					{
						invalidCount++;
					}
					else
					{
						PDFXEdit.IPXC_FileSpec path = actionLaunch.FileSpec;
						if (path == null)
						{
							if (File.Exists(actionLaunch.FileName) == false)
								invalidCount++;
						}
						else
						{
							if (File.Exists(path.DIPath) == false)
								invalidCount++;
						}
						
					}
				}
			}
		}
	}
}