Re: WM_COPYDATA between two applications

cds.cbData = sOrderno.GetLength()+1;

cds.cbData = sOrderno.GetLength()+sizeof(TCHAR);

Hello,

I'm running VC++ 2005.

I have two program and want to exchange some data, a string, between them.

In the sender program I have this function:

BOOL CFSGClientDlg::SendCommand(CString command)
{
COPYDATASTRUCT cds;
LRESULT rc;
TCHAR *buf;

buf = new TCHAR[MAX_COPY_LENGTH];
memset(buf,'\0',MAX_COPY_LENGTH);
_tcscpy_s(buf,MAX_COPY_LENGTH,sOrderno.GetBuffer());
sOrderno.ReleaseBuffer();

cds.dwData = 0;
cds.cbData = sOrderno.GetLength()+1;
cds.lpData = (void*)buf;

rc = m_pSCMLaserCWnd->SendMessage(WM_COPYDATA,
(WPARAM)AfxGetApp()->m_pMainWnd->GetSafeHwnd(),
(LPARAM)&cds);

if (rc ==NULL)
{
DWORD errcode = GetLastError();
return false;
} // if (rc==NULL)
return true;
}

And in the receiver program I have this:

BOOL CMainFrame::OnCopyData(CWnd* pWnd, COPYDATASTRUCT* pCopyDataStruct)
{
CString sData=(TCHAR*)(pCopyDataStruct->lpData);
... doing stuff with sData...
return CFrameWnd::OnCopyData(pWnd, pCopyDataStruct);
}

I can see that the string I send is OK, but when I get to the receiving
part I get a couple of characters correkt and then just rubbish...

What have I done wrong?

// Anders
--
English is not my first, or second, language
so anything strange, or insulting, is due to
the translation.
Please correct me so I may improve my English!