C / C++ / MFC Discussion Boards

Re: Obtaining a list of what exceptions code can throw

Albert Holguin11-Jul-11 5:44

11-Jul-11 5:44

WinError.h contains all of the error codes generally thrown by WinAPI/MFC calls, but generally speaking, there's no clear way of knowing what each method will throw without looking into the documentation associated with that specific method.

Re: Obtaining a list of what exceptions code can throw

bob1697211-Jul-11 6:39

bob16972

11-Jul-11 6:39

Albert Holguin wrote:
WinError.h contains all of the error codes generally thrown by WinAPI/MFC calls

I'm just trying to quickly identify which catch handlers (if any) I would need at the level in the code where I'd want to handle them. Maybe some magic hover help that would allow you to see the summary of all the "throw" declarations for the method call, definition, or declaration your cursor is currently hovering over.

I apologize that I didn't word my question very good, now that I've reread it I guess it did sound like I just wanted a list of all the exceptions that could ever get thrown anywhere. Blush | :O

Regardless, thanks for taking the time to reply.

Re: Obtaining a list of what exceptions code can throw

Albert Holguin11-Jul-11 7:46

Albert Holguin

11-Jul-11 7:46

bob16972 wrote:
Maybe some magic hover help that would allow you to see the summary of all the "throw" declarations for the method call, definition, or declaration your cursor is currently hovering over.

Sorry, no such magic... Smile | :)

Re: Obtaining a list of what exceptions code can throw

MicroVirus12-Jul-11 6:02

MicroVirus

12-Jul-11 6:02

A basic rule of exception handling is also that you only handle exceptions that you are aware and knowledgeable of. You shouldn't just catch any and all exceptions, except for maybe at the top level of your code.
So, you need to look into the documentation to see what exceptions are thrown and how to handle them anyway. It'd still be nice indeed to see what exceptions could be thrown so you can quickly check what you'd have to handle, but I'm guessing the documentation is quick enough for it anyhow, since you'll need to refer to it anyway to understand how to respond to the exception.

How to send TVN_BEGINLABELEDIT from a custom tree control

Amrit Agr10-Jul-11 21:50

Amrit Agr

10-Jul-11 21:50

Hi Developers,

I want to send TVN_BEGINLABELEDIT message from a custom tree control, whenever i will press F2 key( to rename the label ).In custom control I have handled PreTranslateMessage, in which after mapping VK_F2, I have written

SendMessage(TVN_BEGINLABELEDIT, WPARAM(hSelectedItem), 0L);

But in other file ( in which I have handled TVN_BEGINLABELEDIT ), doesn't get called.

Is there any mistake in SendMessage() calling or some other issue.

Thanks in Advance.

Amrit Agrawal

Re: How to send TVN_BEGINLABELEDIT from a custom tree control

Richard MacCutchan10-Jul-11 22:13

Richard MacCutchan

10-Jul-11 22:13

Try showing a bit more of your code so we can see exactly what you are doing - and don't forget to put it within <pre> tags for formatting. Is this MFC or Win32?

The best things in life are not things.

Re: How to send TVN_BEGINLABELEDIT from a custom tree control

User 742933810-Jul-11 22:21

User 7429338

10-Jul-11 22:21

TVN_BEGINLABELEDIT is a notification, which isn't the same as a message. The message in this case is WM_NOTIFY.

You'll probably want to use TVM_EDITLABEL[^].

modified 13-Sep-18 21:01pm.

Re: How to send TVN_BEGINLABELEDIT from a custom tree control

Amrit Agr10-Jul-11 22:59

Amrit Agr

10-Jul-11 22:59

Thanks Jones,

Now It's working.

Amrit Agrawal

How can use Proxy Settings in VC++?

Le@rner10-Jul-11 19:29

Le@rner

10-Jul-11 19:29

Hi all,

can anybody please tell me how can i use the proxy settings in vc++ MFC Application?

thanks in advance.

Re: How can use Proxy Settings in VC++?

Cool_Dev10-Jul-11 20:50

Cool_Dev

10-Jul-11 20:50

Does this CP article help?

Re: How can use Proxy Settings in VC++?

Le@rner11-Jul-11 0:12

Le@rner

11-Jul-11 0:12

this article use proxy settings of IE only what about other browsers?

How to send events to extended child control?

rahul.kulshreshtha8-Jul-11 20:21

rahul.kulshreshtha

8-Jul-11 20:21

I have extended a CComboBox and implemented three messages (or events) like below

 BEGIN_MESSAGE_MAP(CComboCtrl, CComboBox)
ON_WM_KEYDOWN()
ON_CONTROL_REFLECT(CBN_EDITUPDATE, &CComboCtrl::OnCbnEditupdate)
ON_CONTROL_REFLECT(CBN_SELCHANGE, &CComboCtrl::OnCbnSelchange)
 END_MESSAGE_MAP()

Now when a selection changes it calls OnCbnSelchange message-handler. I am using this class inside a dialog class. I have tried to register a message handler in that dialog class for CBN_SELCHANGE event but I think it is not receiving CBN_SELCHANGE event or it is sending that event to custom control. How can I handle CBN_SELCHANGE event inside a dialog class.

This is the implementation inside derived class (or custom control class)

void CComboCtrl::OnCbnSelchange()
{
    // TODO: Add your control notification handler code here
   
    GetLBText(GetCurSel(),m_str_sel); //get previous text in combo. 
		
}

Re: How to send events to extended child control?

Richard MacCutchan9-Jul-11 2:05

Richard MacCutchan

9-Jul-11 2:05

It's a long time since I used MFC message maps, but it looks to me like you are capturing the CBN_SELCHANGE notification in your control, so the dialog box won't see it. I think you may need to move that notification to the dialog or reflect it back somehow. Pual Di Lascia wrote an excellent paper[^] on MFC message processing which I recommend to anyone struggling with this subject.

The best things in life are not things.

Re: How to send events to extended child control?

rahul.kulshreshtha9-Jul-11 8:24

rahul.kulshreshtha

9-Jul-11 8:24

thanks Richard, you got the problem right. I am reading that article now.

PicturControl

manju 38-Jul-11 19:51

manju 3

8-Jul-11 19:51

Hi all,
How can i drag drop the PictureControl.
I have taken a picture control on my dialog and loading one bitmap.Now how can i drag drop that picture control

Thanks
Sharan

Re: PicturControl - REPOST

Richard MacCutchan8-Jul-11 23:30

Richard MacCutchan

8-Jul-11 23:30

Please don't repost the same question - see my suggestions below.

The best things in life are not things.

CImageList

manju 38-Jul-11 18:49

manju 3

8-Jul-11 18:49

Hi all,
How can i load a bitmap on dialog so that i can drag that bitmap using CImagelist.
Anyone having any idea please share with me.
Any links or any samples will be great

Thanks
Sharan

Re: CImageList

Richard MacCutchan8-Jul-11 23:29

Richard MacCutchan

8-Jul-11 23:29

What do you mean by drag? If you are trying to move it to a different window then you need to implement drag and drop as described in some of these links[^]. If you just mean that you want to move the control around within its parent window then you just need to capture your mouse and redraw the control at whatever position the mouse takes you to.

The best things in life are not things.

Multimap?

john56328-Jul-11 0:45

john5632

8-Jul-11 0:45

Hi,

I am using multimap and key value can be duplicates.
I can find first key value using find() function.
But how to get next duplicate key value?

Re: Multimap?

Niklas L8-Jul-11 0:52

Niklas L

8-Jul-11 0:52

Which multimap implementation are you talking about?

Re: Multimap?

Stephen Hewitt8-Jul-11 4:34

Stephen Hewitt

8-Jul-11 4:34

I assume any standard compliant one will do.

Steve

Re: Multimap?

Niklas L8-Jul-11 4:49

Niklas L

8-Jul-11 4:49

I can see no standard compliance requirements in the original post, but your assumptions seem right.

Re: Multimap?

Resmi Anna8-Jul-11 1:05

Resmi Anna

8-Jul-11 1:05

multimap<string, string> mymap;
string strKey;

:
:

multimap<string, string>::iterator it;
:
it = mymap.find( strKey );
if(it != mymap.end())
{
    do
    {
        cout << strKey << " = " << it->second << "\n";
        it++;
    }
    while( it != mymap.upper_bound( strKey ));
}

Re: Multimap?

Stephen Hewitt8-Jul-11 4:32

Stephen Hewitt

8-Jul-11 4:32

This is inefficient. Why calculate the upper bound each loop?

Steve

Re: Multimap?

ThatsAlok8-Jul-11 1:52

ThatsAlok

8-Jul-11 1:52

cppreference.com

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
Never mind - my own stupidity is the source of every "problem" - Mixture

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You

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