Not able to copypaste using SetClipboardData in MFC?

I'am using the below code to copy paste..but it doesnt copy the whole context it just copies couple of letters and leave the rest of all as junk value..if I use char* to get the data buffer and change the project settings to Multi byte support...it will work..but t开发者_JS百科hen i loose to support the unicode formats and I also tried using CF_UNICODETEXT,it is not working either.. Please help me with this

void CCopyPAsteDlg::OnBnClickedPaste()
{
    // TODO: Add your control notification handler code here
 if (OpenClipboard()) 
 {
  if (::IsClipboardFormatAvailable(CF_TEXT)
  || ::IsClipboardFormatAvailable(CF_OEMTEXT))
  {
    HANDLE hClipboardData = GetClipboardData(CF_TEXT);
    LPCTSTR pchData = new TCHAR[256];
    pchData = (LPCTSTR)GlobalLock(hClipboardData);

    CString strFromClipboard = pchData;
    m_SetText.SetWindowText(strFromClipboard);
    GlobalUnlock(hClipboardData);
  }
  else
  { 
    //AfxMessageBox(L"There is no text (ANSI) data on the Clipboard.");
  }
  CloseClipboard();
 }



}

void CCopyPAsteDlg::OnBnClickedCopy()
{
    // TODO: Add your control notification handler code here
    UpdateData();
    CString strData;
    m_GetText.GetWindowText(strData);

     if (OpenClipboard())
      {
          EmptyClipboard();
          HGLOBAL hClipboardData;
          hClipboardData = GlobalAlloc(GMEM_DDESHARE, 
                                       strData.GetLength()+1);

          LPCTSTR  pchData = new TCHAR[256];
          pchData = (LPCTSTR)GlobalLock(hClipboardData);


          wcscpy((wchar_t*)pchData,strData);
          GlobalUnlock(hClipboardData);
          SetClipboardData(CF_TEXT,hClipboardData);

          CloseClipboard();
      }


}

Copy:

HGLOBAL hClipboardData = GlobalAlloc(GMEM_DDESHARE, 
                                       (strData.GetLength()+1)*sizeof(TCHAR));
LPCTSTR pchData = (LPCTSTR)GlobalLock(hClipboardData);
...
SetClipboardData(CF_UNICODETEXT,hClipboardData);

Paste:

HANDLE hClipboardData = GetClipboardData(CF_UNICODETEXT);
LPCTSTR pchData = (LPCTSTR)GlobalLock(hClipboardData);