C / C++ / MFC Discussion Boards

alex.barylski13-Feb-04 12:25

13-Feb-04 12:25

I have a derived CListCtrl in which I handle a double click event, but I need to find out which item was clicked on (if any).

From the function below is there any way I can get mouse coordinates from HMHDR??? I need to pass this info onto HitTest() but it doesn't appear likely I can get mouse coordinates from the parameters below???

CListCtrl::OnDblclk(NMHDR* pNMHDR, LRESULT* pResult)

Should I use PeekMessage and get the coordinates of the mouse when the last message was fired off???

What method should I use?

Thanks

Cheers Smile | :)

The word of the day is legs, let's go back to my house and spread the word Poke tongue | ;-P

Re: Get mouse coordinates

Jörgen Sigvardsson13-Feb-04 13:21

Jörgen Sigvardsson

13-Feb-04 13:21

If you look closely in the MSDN docs, you'll see that NM_DBLCLK for listviews, actually sends a NMITEMACTIVATE*. NMITEMACTIVATE* info = (NMITEMACTIVATE*)pNMHDR

(There's a NMITEMACTIVATE::iItem that'll interest you, I'm sure... Smile | :)

)

--
Summer breeze makes me feel fine. Blowing, through the jasmine in my mind.

Quick Question

Nick Parker13-Feb-04 11:13

Nick Parker

13-Feb-04 11:13

Ok, I am stumped here. I have an ActiveX COM dll written in VB6 that is returning an array of doubles. I am using the Class Wizard to import the typelib. so I can call a series of methods one of which returns array of doubles. The class wizard writes out both the .h and .cpp files for me, however it comments out the one method that is returning the array doubles saying:

// method 'GetNum' not emitted because of invalid return type or parameter type

I found a kb article telling me to use the ITypeLib viewer so I can manually write the method into the header and cpp files. This is where I am stuck. The ITypeLib viewer shows the method as such:

[id(0x60030004)]<br />
HRESULT GetNum([out, retval] SAFEARRAY(double)* );

Any help for writing the guts to make the InvokeHelper call would be much appreciated.

This is what I was initially trying:

SAFEARRAY* _Moses::GetNum()
{
	SAFEARRAY* result;
	InvokeHelper(0x60030004, DISPATCH_METHOD, VT_R8, (void*)&result, NULL);
	return result;
}

TIA.

- Nick Parker
My Blog

Re: Quick Question

Monty²14-Feb-04 0:16

Monty²

14-Feb-04 0:16

just a wild suggestion

try returning SafeArray of VARIANT instead of doubles

Might do something

C makes it easy to shoot yourself in the foot; C++ makes it harder, but when you do, it blows away your whole leg

ReadProcessMemory

__Cerb13-Feb-04 10:10

__Cerb

13-Feb-04 10:10

Can anyone post an example of the ReadProcessMemory function in action, let's say I want it to read at offset 0x6FB74910

Thanks,
Michael

Listbox Frustration

C++NewBe13-Feb-04 9:53

C++NewBe

13-Feb-04 9:53

How do I size and create two columns in a ListBox?

X str1
X2 str2
.
.
Xx strx

Unsure | :~

Re: Listbox Frustration

alex.barylski13-Feb-04 10:02

alex.barylski

13-Feb-04 10:02

Use a multi-column listbox...which is very limiting or use a CListCtrl.

Cheers Smile | :)

The word of the day is legs, let's go back to my house and spread the word Poke tongue | ;-P

64-bit compatibility

Freon13-Feb-04 9:48

Freon

13-Feb-04 9:48

Is there any way to check for 64-bit and fix compatibility issues in a large .NET solution without generating thousands of warnings?

If _WIN64 *is not* defined, the Windows headers define many function parameters and return types as 32 bits, so I get warnings for all integer/pointer conversions involving those functions. For example, consider the following header functions:

inline void* GetWindowUserData (HWND hwnd)
{
return (void*) GetWindowLongPtr(hwnd, GWLP_USERDATA);
}

inline void* SetWindowUserData (HWND hwnd, void* data)
{
return (void*) SetWindowLongPtr(hwnd, GWLP_USERDATA, (LONG_PTR)data);
}

These two alone generate the following warnings in *every* source file that includes this header (which is most of them in the solution):

..\Viewapi\Vapidlg.h(155) : warning C4312: 'type cast' : conversion from 'LONG' to 'void *' of greater size
..\Viewapi\Vapidlg.h(161) : warning C4244: 'argument' : conversion from 'LONG_PTR' to 'LONG', possible loss of data
..\Viewapi\Vapidlg.h(161) : warning C4312: 'type cast' : conversion from 'LONG' to 'void *' of greater size

If _WIN64 *is* defined, a huge number of warnings are produced that I cannot tie to anything in my source code. For example:

C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\atlmfc\include\atlalloc.h(342) : warning C4244: 'argument' : conversion from 'SIZE_T' to 'size_t', possible loss of data
loss of data
C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\atlmfc\include\atlalloc.h(382) : warning C4244: 'argument' : conversion from 'SIZE_T' to 'size_t', possible loss of data
C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\atlmfc\include\atlalloc.h(381) : while compiling class-template member function 'void *ATL::_ATL_SAFE_ALLOCA_IMPL::CAtlSafeAllocBufferManager<Allocator>::Allocate(SIZE_T)'
with
[
Allocator=ATL::CCRTAllocator
]
C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\atlmfc\include\atlconv.h(778) : see reference to class template instantiation 'ATL::_ATL_SAFE_ALLOCA_IMPL::CAtlSafeAllocBufferManager<Allocator>' being compiled
with
[
Allocator=ATL::CCRTAllocator
]

How can I reduce the number of spurious warnings so that I can fix the real issues?

Thanks in advance...

Cannot attach debugger to a remote process

Anonymous13-Feb-04 9:13

Anonymous

13-Feb-04 9:13

Please help!

I have successfully debugged remote processes by changing the debug
properties for my projects. However, I can only do this when I launch the
remote process from my local copy of Visual C++ .NET 2003. I have not been
able to attach the debugger to an ongoing process launched at the remote
machine. My understanding is that I should select "Tools > Debug Process"
and then set the "Transport" value and set "Name" to my remote machine. However, "Transport"
is set to "Default" and "Name" is set to my local machine, and both fields
are shown as static labels, not as edit controls or drop-down selection
lists. It's impossible to change their values!

Does anyone know why this is happening? How can I fix this issue? I've tried reinstalling VC++ with all components selected and I still have the same problem.

Thanks,
Silvio

How do I know if I have MAPI installed for Lotus Notes mail client?

ElizabethC13-Feb-04 9:10

ElizabethC

13-Feb-04 9:10

I am starting to add an email interface to the MFC application. How do I know if I have MAPI installed for Lotus Notes mail client?

Elizabeth

Need help sending email out from MFC application using Lotus Notes mail server

ElizabethC13-Feb-04 8:44

ElizabethC

13-Feb-04 8:44

I need help implementing an interface to send email out from a MFC application using our Lotus Notes mail server. I tried running the sample application NPP came with the Visual Studio. It always came up with an Outlook dialog. But I want to use our Lotus Notes mail server. Can you tell me where to add the mail server information. By the way, I looked at the sample code, there was no custom code for OnFileSendMail.

Elizabeth

Re: Need help sending email out from MFC application using Lotus Notes mail server

valikac14-Feb-04 5:34

valikac

14-Feb-04 5:34

Are you implying the use the Lotus mail client as the default Windows e-mail client?

Kuphryn

Dial-up Networking & Dialing Rules

Russell Morris13-Feb-04 8:16

Russell Morris

13-Feb-04 8:16

Does anybody know of what APIs I can use to enumerate the configured 'Location's in Windows Dialup Networking? I also need to know how to set the active location programmatically before I invoke a RasDial call...

Does anyone know of the APIs that handle this?

--
Russell Morris

"So, broccoli, mother says you're good for me... but I'm afraid I'm no good for you!" - Stewy

Re: Dial-up Networking & Dialing Rules

valikac14-Feb-04 5:35

valikac

14-Feb-04 5:35

Lookup up the source code for RasDial.

Kuphryn

SQL compare time part of datetime field

asdf175313-Feb-04 7:29

asdf1753

13-Feb-04 7:29

hi how can i compare time part of datetime field in SQL, for exaple :
time of datetimefield between '12:24:36' and '18:50:25'
thank you
Rose | [Rose]

Re: SQL compare time part of datetime field

David Crow13-Feb-04 8:11

David Crow

13-Feb-04 8:11

SELECT xxx FROM xxx WHERE datetimefield BETWEEN #01/01/1970 12:24:36# AND #12/31/2038 18:50:25#

I had to do the opposite once where I wanted rows for a particular day, regardless of the time. I used:

SELECT xxx FROM xxx WHERE datetimefield BETWEEN #02/13/2004 00:00:00# AND #02/13/2004 23:59:59#

A rich person is not the one who has the most, but the one that needs the least.

MDI Document Sample

vancouver77713-Feb-04 7:23

vancouver777

13-Feb-04 7:23

Is there any resource on how to write document on MDI?

Re: MDI Document Sample

David Crow13-Feb-04 8:13

David Crow

13-Feb-04 8:13

Plenty. A good starting point would be to search for CMultiDocTemplate.

A rich person is not the one who has the most, but the one that needs the least.

How to get Drag data from IE

Vistac13-Feb-04 6:46

Vistac

13-Feb-04 6:46

Hello Sir,
I have a application need get image from IE,
I want to implement drag/drop in this file,
for example, I visit a website, got a webpage,
there are some images in this page,
If I need this image, I drag this image to my application,
then my application will show this image.
I have some question about this list at below:

1.what kind of DROPEFFECT I need to return in OnDropOver(...), DROPEFFECT_LINK or DROPEFFECT_COPY?
2.how to show this image in OnDrop()?
Thanks
Vistac

Visual Studio .NET Wizard(s)

ExtraLean13-Feb-04 5:58

ExtraLean

13-Feb-04 5:58

Hi All,

Does anyone else notice that the Visual Studio .NET "Add Member Function" and "Add Member Variable" wizards insist on adding an extra #include line to the .cpp file? Every time I delete it, but every time I use the wizard it just keeps putting it back.

Example:

Before I use the wizard, these are the only includes:

#include "stdafx.h"
#include "OtherDlg.h"

After I use the wizard, it places the extra one like this:

#include "stdafx.h"
#include "OtherDlg.h"
#include ".\otherdlg.h"

Notice that I already have OtherDlg.h included, but in a different case. I'm wondering if anyone else experiences this, because it does it for me *every* time! Does anyone know what's going on and how to fix it? Confused | :confused:

Thanks!

--
Edward Livingston
(aka ExtraLean)
--
"I still maintain that seeing a nipple is far less disturbing than seeing someone get their brains blown out." -- Chris Maunder

No tooltip in .NET IDE

morefalt13-Feb-04 5:52

morefalt

13-Feb-04 5:52

Hi!

Can anyone tell me why in all old functions like my GetYrkeKategoriPtr() the tooltip 'CDatabase *CRecordset::m_pDatabase' are shown when cursor is over the variable m_pDatabase, but in all my newly added function like GetSystemPtr() it is not shown?

CRSAYrkeKategori* CSysDoc::GetYrkeKategoriPtr()
{
m_YrkeKatSet.m_pDatabase = GetDeDUDB();
return &m_YrkeKatSet;
}

CRSASystem* CSysDoc::GetSystemPtr()
{
m_SystemSet.m_pDatabase = GetDeDUDB();
return &m_SystemSet;
}

MSc Bertil Morefält

MIDI delta.2.SMTPE convert

~toki13-Feb-04 5:47

~toki

13-Feb-04 5:47

I need to convert delta time to SMTPE offset time. How can i calculate it? Confused | :confused:

The TimeSignature is:

Numerator = 2;
Denominator = 4;
MidiClocksPerClick = 24;
NumberOfNotated32nds = 8;

I have delta-time for every message but i only can runnnig the segment in a time based generator, this of course, cause some slow and fast play notes in a random sequence (i compare the elapsed time with the delta time in every callback WTF | :WTF:

)
I search over all inet but i wasn't be able to find what im looking for. Dead | X|

List View Question

Prakash Nadar13-Feb-04 4:50

Prakash Nadar

13-Feb-04 4:50

when i call the following macro
ListView_DeleteAllItems(HWND hwnd);

all the items are delete, fine with that.

now i have allocated some memory in lparam in LVITEM
i want to release that.
How do i do that, I know there is an event that is called when similar things is done with tree view.
what is that event for Listview. I could not find it.
this is a cause for major memory leak as this operaion is done several times

Thanx in advance.

Last time I was sober, man I felt bad
Worst hangover that I ever had
It took six hamburgers and scotch all night
Nicotine for breakfast just to put me right.... Dire Straits

Re: List View Question

David Crow13-Feb-04 5:05

David Crow

13-Feb-04 5:05

You have to iterate through each item, call GetItemData(), and delete the pointer. After that, you can call ListView_DeleteAllItems().

A rich person is not the one who has the most, but the one that needs the least.

Re: List View Question

Steve S13-Feb-04 5:33

Steve S

13-Feb-04 5:33

For individual items, the List View's parent can also handle WM_NOTIFY with LVN_DELETEITEM.

For DeleteAllItems, you get sent LVN_DELETEALLITEMS, and if you return FALSE, you'll get an LVN_DELETEITEM for each item as it's deleted. If you return TRUE, that suppresses the individual delete notifications. (This is only for the batch that will be deleted).

If you adopt David's approach (which works perfectly well), you can improve performance by suppressing the individual delete notifications, as you no longer need them.

Steve S

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.