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{
CString result; static BYTE parms[] =
VTS_I4 VTS_I4;
InvokeHelper(0x5, DISPATCH_METHOD, VT_BSTR, (void*)&result, parms,
File, Number); return result;
}
CString HengstlerTerminalServer::WriteFile(long File, long Number, LPCTSTR Value)
{
CString result; static BYTE parms[] =
VTS_I4 VTS_I4 VTS_BSTR;
InvokeHelper(0x6, DISPATCH_METHOD, VT_BSTR, (void*)&result, parms,
File, Number, Value); return result;
}
hconnect.cpp:
// This example is taken from the Microsoft example CALCDRIV
// and has been modified for use with Hengstler Terminal Server
BOOL CDriverDlg::OnInitDialog()
{
CDialog::OnInitDialog();
// create the hts object that we'll drive through OLE automation
COleException e;
CLSID clsid; if (CLSIDFromProgID(OLESTR("Hengstler.TerminalServer.10"), &clsid) !=
NOERROR)
{
AfxMessageBox(IDP_UNABLE_TO_CREATE);
EndDialog(IDABORT); return FALSE;
}
// try to get the active hts before creating a new one
LPUNKNOWN lpUnk;
LPDISPATCH lpDispatch; if (GetActiveObject(clsid, NULL, &lpUnk) == NOERROR)
{
HRESULT hr = lpUnk->QueryInterface(IID_IDispatch,
(LPVOID*)&lpDispatch); lpUnk->Release(); if (hr == NOERROR) m_hts.AttachDispatch(lpDispatch, TRUE);
}
// if not dispatch ptr attached yet, need to create one if (m_hts.m_lpDispatch == NULL &&
!m_hts.CreateDispatch(clsid, &e))
{
AfxMessageBox(IDP_UNABLE_TO_CREATE);
EndDialog(IDABORT); return FALSE;
}
// read a counter register to test and see if it works
CString result = m_hts.ReadRegister(1,1);
// examine result in the debugger return TRUE; // return TRUE unless you set the focus to a control
}
Tuning
In order to suppress the overhead inside HTS which occurs during open device and close device operations upon each DDE or OLE request a trick can be applied. Append the following lines to the file hentmsrv.ini
(after terminating HTS):
hentmsrv.ini:
[MultiTasking]
DirectAccess=1
This modification should only be carried out if HTS is used exclusively by one application. Please watch the case of the letters.
HTS for Windows page 25
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