C / C++ / MFC

Re: Multiple column ListBox

8-Jan-02 7:02

The Free C/C++ Compilers section of thefreecountry.com lists several products that might do for you (like the old Turbo C compilers that are listed here as offered for free).

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

SetMenuItemBitmaps()

8-Jan-02 4:18

how to work with SetMenuItemBitmaps() and set the size of the bitmaps with GetSystemMetrics(SM_CXMENUCHECK)
example will be great ! Rose | [Rose]

Multiple column ListBox

8-Jan-02 4:12

Hi All,
I want to display some data in multiple column ListBox. In 1st column I want to display
Attribute-Name and in 2nd column Attribute-Value.
What I need to Do?
I’ve a dialog-box created, in which I added a ListBox Control.
Any suggestions are welcome
Thanks,
-- Sumit

Carlos Antollini8-Jan-02 4:35

Carlos Antollini

8-Jan-02 4:35

You need to Use a List View....

Best Regards....

Carlos Antollini.
Sonork ID 100.10529 cantollini

Re: Multiple column ListBox

Joaquín M López Muñoz8-Jan-02 4:55

8-Jan-02 4:55

Altough I agree with Carlos in that you're better off using a list view control, still there's a feature of list boxes that could suit your needs, namely tabstops, which work pretty much the same as user-defined tabstops in a word processor. For instance, if your first attribute name was "Age" and its corresponding value was "30", you would have to write something like

int tabs[]={60,60};
m_listbox.SetTabStops(2,tabs); //set tabstops positions
m_listbox.AddString("Age\t30"); //different "columns" separated by "\t"

Hope this helps.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Finding port

Rickard Andersson²⁰8-Jan-02 3:51

Rickard Andersson²⁰

8-Jan-02 3:51

How can I use a function to retrive the port number of a POP3 server?
I know there is one functions at lesat.. but don't which

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©0d3 ©®4©k3® - That's me! Smile | :)

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Re: Finding port

Joaquín M López Muñoz8-Jan-02 3:55

Disable/Enable OK on propertysheet

8-Jan-02 3:55

Maybe I haven't understood your question, but port number is something you must know before you begin communicating with a POP3 server. The standard port number for this service is 110.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Finding port

Rickard Andersson²⁰8-Jan-02 4:10

Rickard Andersson²⁰

8-Jan-02 4:10

no, you understod me!
But I was confused and you cleared my memory so now I can use it again! Smile | :)

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©0d3 ©®4©k3® - That's me! Smile | :)

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Ken Goguen8-Jan-02 3:47

Ken Goguen

8-Jan-02 3:47

Can anyone tell me how to enable/disable the ok button on a property sheet? I want to have the button disabled until the user enter all the required information, then enable it.

-ken

Ken Goguen

Re: Disable/Enable OK on propertysheet

Joaquín M López Muñoz8-Jan-02 5:45

Re: Disable/Enable OK on propertysheet

8-Jan-02 5:45

You can get hold of a CWnd * to the OK button with GetDlgItem(IDOK) (if inside a method of the property sheet) or GetParent()->GetDlgItem(IDOK) (from a method of a child property page). Then you can call CWnd::EnableWindow for that pointer.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Ken Goguen8-Jan-02 6:49

Ken Goguen

8-Jan-02 6:49

Thanks.

-kg

Ken Goguen

Safearray of UDT

Krouer8-Jan-02 3:00

8-Jan-02 3:00

I have an automation interface which own a UDT array. The UDT is define as
struct NoteDesc {
float base;
float pitch;
float medium;
};

In my interface, I have set the get and put properties. put works really great but after I return from get, I have memory crash in the kernel.

Here my interface def:
[
object,
uuid(60C22F90-D3BB-4BA0-ABCC-837E4CA2AEF2),
dual,
helpstring("IScoreDesc Interface"),
pointer_default(unique)
]
interface IScoreDesc : IDispatch
{
[propget, id(1)] HRESULT NumberOfNote([out, retval] long *pVal);
[propput, id(1)] HRESULT NumberOfNote([in] long newVal);
[propget, id(2)] HRESULT Notes([out, retval] SAFEARRAY(NoteDesc) *pVal);
[propput, id(2)] HRESULT Notes([in] SAFEARRAY(NoteDesc) newVal);
};

and the class compil well, the call to get is effective. The problem occur when I return of the function get define like that in my h file:
STDMETHOD(get_Notes)(SAFEARRAY* *pVal);

Do you have any idea?

Joaquín M López Muñoz8-Jan-02 3:10

8-Jan-02 3:10

It'd be most helpful if you could post the actual implementation of your get_Notes function. Anything else seems to be OK.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Krouer8-Jan-02 3:49

8-Jan-02 3:49

The source code of my function: (my comment are in french, don't take care of them)

STDMETHODIMP CScoreDesc::get_Notes(SAFEARRAY **pVal)
{
// Remplis une structure d'information pour pouvoir créer le tableau
IRecordInfo* pRecordInfo = NULL;
HRESULT hr = GetRecordInfoFromGuids(LIBID_MUSICSEARCHSYSTEM, 1, 0, GetUserDefaultLCID(), IID_NodeDesc, &pRecordInfo);
// Détruit le tableau si il existait déjà
if (*pVal != NULL)
{
SafeArrayDestroy(*pVal);
*pVal = NULL;
}
// Crée un tableau pour le transport
*pVal = SafeArrayCreateVectorEx(VT_RECORD, 0, m_NumberOfNote, pRecordInfo);
pRecordInfo->Release();
if (*pVal == NULL)
{
hr = Error(_T("Cannot create the Notes decription array"));
return hr;
}

// Rempli le tableau avec le contenu du tableau interne
NoteDesc* pNoteArray;
hr = SafeArrayAccessData(*pVal, (void**) &pNoteArray);
if FAILED(hr) return hr;
memcpy(pNoteArray, m_Notes, sizeof(NoteDesc)*m_NumberOfNote);
SafeArrayUnaccessData(*pVal);

return S_OK;
}

The IID_NoteDesc is defined at the top of this cpp file.

I have try to follow an article I found on this site write by Ioannis Stamatopoulos.

Thanks,
Bruno

Joaquín M López Muñoz8-Jan-02 4:20

8-Jan-02 4:20

The only thing I can guess about your code is that maybe sizeof(NoteDesc) is not equal to the value provided by pRecordInfo->GetSize() due to alignment considerations. Could you check that out?

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Krouer8-Jan-02 4:48

8-Jan-02 4:48

The error message:
HEAP[musicserver.exe]: Invalid Address specified to RtlFreeHeap( 130000, 1e0690 )

The size return pRecordInfo->GetSize and sizeof(NoteDesc) are identical (value is 12 - 3 32bits floats)

I don't know where it found to have to destroy this huge part of memory.

My test array contains only 10 elements, that's 120 bytes. Not 722576 if I have understand correctly the trace from the HEAP.

Thanks,
Bruno

Joaquín M López Muñoz8-Jan-02 5:31

8-Jan-02 5:31

Well, this is wild guessing, but anyway... What client technology are you using? If it's ASP or other VB-based stuff, seems like VBSCRIPT does not handle SAFEARRAYs of objects other than VARIANTs (read MSDN article PRB: Script Error Occurs When Referencing Non-variant Array (Q165967)). Also, if your client is written in C#, I've read several posts on the Usenet about an alleged bug of the .NET platform that shows when dealing with SAFEARRAYs created via SafeArrayCreateVector(Ex) --this is far from confirmed, though.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Krouer8-Jan-02 5:36

8-Jan-02 5:36

Client are currently in C++ (Console test app and ActiveX)

I will give a try with SafeArrayCreateEx instead of SafeArrayCreateVectorEx. Perhaps, they have a bug with that last function.

Many thanks Joaquin for your help,

Thanks,
Bruno

Joaquín M López Muñoz8-Jan-02 5:48

8-Jan-02 5:48

Sorry I haven't been more helpful. Bonne chance!

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Krouer8-Jan-02 5:58

8-Jan-02 5:58

Joaquín M López Muñoz wrote:
Sorry I haven't been more helpful. Bonne chance!
Don't be sorry. You have find the solution.

I replace the SafeArrayCreateVectorEx by a SafeArrayCreateEx and it works perfectly.

Gracias y buenas tardes,
Bruno

Joaquín M López Muñoz8-Jan-02 6:00

8-Jan-02 6:00

!!

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo