TTreeNode * __fastcall TForm1::GetNodeByText(AnsiString sSearchText)
{
      TTreeNode *pResultNode = NULL;
      TTreeNode *pNode = (TreeView1->Items->Count > 0) ? TreeView1->Items->Item[0] : NULL;

      // alle Nodes durchsuchen
      while (pNode != NULL)
      {
            if (UpperCase(pNode->Text) == UpperCase(sSearchText))
            {
                pResultNode = pNode;
                break;
            }

            // nächstes Item in der Liste TreeView1->Items heraussuchen
            pNode = pNode->GetNext();
      }

      return pResultNode;
}

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