How get file content in dialog box while clicking on file view in splitter windows using mfc

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C++

MFC

void CFileView::OnDoubleClick(NMHDR* pNMHDR, LRESULT* pResult)
{
    NMITEMACTIVATE* pNMItem = (NMITEMACTIVATE*)pNMHDR;
    int nItem = pNMItem->iItem;

    if (nItem != -1) {
        ITEMINFO* pItem = (ITEMINFO*)GetListCtrl().GetItemData(nItem);
        CString strFullPath = m_strPath + "\\" + pItem->strFileName;

        CFile file;
        if (file.Open(strFullPath, CFile::modeRead | CFile::typeBinary)) {
            UINT nFileSize = (UINT)file.GetLength();

            char* pBuffer = new (std::nothrow) char[nFileSize];
            if (pBuffer) {
                if (file.Read(pBuffer, nFileSize) > 0) {
                    file.Close();

                    // Create the dialog
                    CDialog dlg(IDD_DIALOG1, this); // Ensure 'this' is the parent window

                    // Show the dialog
                    // Show the dialog
                    if (dlg.DoModal() == IDOK) {
                        // Handle OK button clicked
                    }
                    else {
                        // Handle dialog closed
                        CEdit* pEditCtrl = (CEdit*)dlg.GetDlgItem(IDC_EDIT1);
                        if (pEditCtrl) {
                            pEditCtrl->SetWindowText(CString(pBuffer, nFileSize));
                        }
                        else {
                            AfxMessageBox(_T("Failed to get edit control!"));
                        }
                    }

                }
                else {
                    delete[] pBuffer;
                    file.Close();
                    AfxMessageBox(_T("Failed to read file content!"), MB_ICONERROR);
                }
            }
            else {
                file.Close();
                AfxMessageBox(_T("Failed to allocate memory for file content!"), MB_ICONERROR);
            }
        }
        else {
            AfxMessageBox(_T("Failed to open file!"), MB_ICONERROR);
        }
    }

    *pResult = 0;
}

What I have tried:

I have tried this and many ways but in file view when iam clicking file it should display content in bottomview in dialog box iam not unable to get it resolve and give the correct code.