Hi there, What you have to modify is your IDL code to use the [optional] attribute for the method declaration. So your code should look something like this

[id(0x00000001)] HRESULT vListMachine([in] VARIANT SrvName, [in, optional] VARIANT Domain);

where Domain is an optional parameter. Check the MSDN for the MIDL optional attribute. Fabian

Hi there The line 622 in atlbase.h is the -> operator of the CComQIPtr< > class template, and I don't see you are using any instance of it in the code you posted, so I suggest you to open the "Call stack" (Alt + 7) when you get the assert, and follow you way up until you reach the line in your code which is calling the -> operator on an instance of CComQIPtr<>, and then take a look why that pointer is NULL. Regards, Fabian

Hi, How about this?

CString s = "\r\none more line";
CFile file("c:\\test.txt", CFile::modeCreate | CFile::modeWrite | CFile::modeNoTruncate);
file.SeekToEnd();
file.Write(s, s.GetLength());

Fabian

Hi, I just tried this

CString s = "First line\r\n";
CFile file("c:\\test.txt", CFile::modeCreate | CFile::modeWrite);
file.Write(s, s.GetLength());
s = "second line";
file.Write(s, s.GetLength());

and this is what I see in the text.txt file First line second line Do you see something I did differently? Fabian

Hi, I have a question about this. Posting an article, award bronze and posting at least one message adds one extra level, so anybody in his/her first year of membership with one article and at least one message should be silver, isn't it? Then posting another message the second year moves him/her up to gold? Is this right? Could you please clarify it for me. Regards, Fabian

Hi, Try OnEraseBkgnd Fabian

Hi First you should make a list of all the special days you are interested in, and then do a Google search on how to calculate when is each one. For example, Easter, is the Sunday following the Paschal Full Moon (PFM) date for the year; Mother's Day is always the second Sunday of May and so on. There is a way to calculate each an every one of them. Good luck, Fabian

Hi there I think a filter to see only unanswered questions on the message board would be nice. Regards, Fabian

Hi, You may use this article as starting point: Using the Winsock Control Fabian

Hi To have drop capabilities, a control must implement IDropTarget interface and regiter itself as a drop target using the RegisterDragDrop function. Fabian

Hi there, You are missing an & in front of Ipic.

hr = OleLoadPicturePath(OlePathName,NULL,0,0,IID_IPicture,(void **)(**&**Ipic));

Fabian

Hi Check the MSDN fot CWnd::OnCtlColor, it even has a example of what you are asking. You just have to verify the message is for the control you want to change, otherwise do nothing. Extracted form the MSDN

// This OnCtlColor handler will change the color of a static control
// with the ID of IDC_MYSTATIC. The code assumes that the CMyDialog
// class has an initialized and created CBrush member named m_brush.
// The control will be painted with red text and a background
// color of m_brush.

HBRUSH CZilchDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
// Call the base class implementation first! Otherwise, it may
// undo what we're trying to accomplish here.
HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);

// Are we painting the IDC_MYSTATIC control? We can use
// CWnd::GetDlgCtrlID() to perform the most efficient test.
if (pWnd->GetDlgCtrlID() == IDC_MYSTATIC)
{
// Set the text color to red
pDC->SetTextColor(RGB(255, 0, 0));

  // Set the background mode for text to transparent 
  // so background will show thru.
  pDC->SetBkMode(TRANSPARENT);

  // Return handle to our CBrush object
  hbr = m\_brush;

}

return hbr;
}

Fabian

Hi, Could you be more specific? If I do this

TCHAR t = 0x01FF;
SendMessage(WM\_CHAR, (WPARAM)t, NULL);

when I process the message I get wParam == 0x000001FF Fabian

Hi Check GradientFill() on the Win32 API documentation. Fabian

Hi, For most of the devices, the GDI will just delegate the drawing to the device itself because the drawing has been optimized by the manufacturer of that piece of hardware. Check the API GetDeviceCaps, it tells you if the hardware device is capable to draw the primitive, in this case, of an ellipse. Fabian

Hi ODBC, ADO or OLEDB will only allow you to manipulate data in and out Excel files, to go beyond that, you should use Automation, then you will be able to do, programmatically, anything you have to do. You can take a look here to start, SAMPLE: XLCLIENT: Automation Client for Excel, also search the MSDN for more info. Fabian

Hi, I don't know what do you mean with "...how to send a character..." but if what you want is assign a UNICODE character to a variable, this is how

TCHAR c = 0x0100;

Now if you are talking about UNICODE strings, use BSTR or one of the classes that encapsulate it, CComBSTR or _bstr_t. Fabian

Hi Aaron, There is an error in the way you are returning the string, what you are doing is passing the address of the string contained on m_bsResponse to the caller, the problem there is if the instance of CPopClient is destroyed the client will end having an address to a string that is not longer valid. So, what you should do is create a copy of the string and return the address of the copy. Remember BSTR is a pointer to a wide character string, so BSTR * is a pointer to a pointer!!!

STDMETHODIMP CPopClient::get_Response(BSTR *pVal)
{
*pVal = m_bsResponse.Copy(); // m_bsResponse is a CComBSTR
return S_OK;
}

And the client should do something like this to call it

BSTR sResponse;
IPop->get_Response(&sResponse);

... do something with the string

//Free the string
SysFreeString(sResponse);

Fabian

Hi Well one option is, as you said, having two versions, the other one is using the Microsoft Layer for Unicode on Windows 95/98/Me Systems Fabian

Hi, From VB you can use ZOrder, MyForm.ZOrder 0 will send the form to the top of the z order MyForm.ZOrder 1 will send it to the bottom of the z order If you are looking for more control, check SetWindowPos API function,

BOOL SetWindowPos(
HWND hWnd, // handle to window
HWND hWndInsertAfter, // placement-order handle
int X, // horizontal position
int Y, // vertical position
int cx, // width
int cy, // height
UINT uFlags // window-positioning options
);

where hWndInsertAfter is a handle to the window to precede the positioned window in the Z order or one of the following values. HWND_BOTTOM HWND_NOTOPMOST HWND_TOP HWND_TOPMOST Check the MSDN for a detailed explanation. Fabian