Problem with WM_COPYDATA

[maverick786us]

There is a problem while overriding WM_COPYDATA, it only copies the base address

//Source Application
COPYDATASTRUCT cpd, cpdProjectName, cpdTitleReportName;
UINT wind;
	
MYDATASTRUCT myStringData;
WTL::CString strDataToSend  = L"4012";
CComBSTR localStr(strDataToSend);
			
cpd.dwData = 0;			// arbitatry long data to send
cpd.lpData = localStr.m_str;		// a pointer to the buffer containing 
				// data to send
cpd.cbData = localStr.ByteLength()+1;
			
copyDataResult = ::SendMessage(pOtherWnd, WM_COPYDATA, (WPARAM)::GetWindowContextHelpId(pOtherWnd), (LPARAM)&cpd);
::SendMessage(pOtherWnd, WM_COPYDATA, (WPARAM)0, (LPARAM) (LPVOID)&cpd);c
copyDataResult = ::SendMessage(pOtherWnd, WM_COPYDATA, (WPARAM)(HWND)pOtherWnd, (LPARAM) (LPVOID)&cpd);

//Destination Application
LONG CTrendProjectDlg::OnCopyData(UINT wind, LONG cpdL)
{
	COPYDATASTRUCT *cpdP;
                long retVal;
   
	cpdP = (COPYDATASTRUCT*)cpdL; 
	m_RxData = (LPCSTR)(cpdP->lpData);
	
	double wcstod( const wchar_t *nptr, wchar_t **endptr );
	dCCCompleted = wcstod(m_RxData, NULL);
	
	CWnd *pRxData = GetDlgItem(IDC_ED_RXDATA);
	pRxData->SetWindowText(m_RxData);
	retVal = 0;
	return (retVal);     // return value will be seen bu 32-bit app.
}

Can some help me in resolving this?