C / C++ / MFC Discussion Boards

Re: Question about classes

CPallini20-Oct-08 3:43

CPallini

20-Oct-08 3:43

for instance, suppose your class having 2 methods DoSomething, JustDoAnotherThing:

// _pcl is the global pointer to the CmyClass object.
// myObj is just an alias to such object.
CmyClass & myObj = *_pcl;

// no pointer syntax below
myObj.DoSomething(); 
myObj.JustDoAnotherThing()
...

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: Question about classes

akirilov20-Oct-08 3:51

akirilov

20-Oct-08 3:51

Thank you very much!!!
You saved my day, I really, really hate '->'.

Re: Question about classes

CPallini20-Oct-08 4:10

CPallini

20-Oct-08 4:10

wait, friend, wait: you're going to discover some interesting issues using references. Roll eyes | :rolleyes:

Re: Question about classes

akirilov20-Oct-08 4:30

akirilov

20-Oct-08 4:30

oh, I think I already did ... Cry | :((

I tried (global variables):
CakRadioBox *prb = NULL;
CakRadioBox & rb;

well ... it doesn't work, it require initialization

I changed it to:
CakRadioBox *prb = NULL;
CakRadioBox & rb = *prb;

so far so good, but when in Init() I wrire:
prb = new CakRadioBox(10, 134, 44, 24);
rb = *prb

I receive exception Roll eyes | :rolleyes:

How to get index of selected Tree Item

Dhiraj kumar Saini20-Oct-08 2:10

Dhiraj kumar Saini

20-Oct-08 2:10

Hi,

I have a tree control and i want to know the index of the tree item selected.

Thanks In Advance.

Dhiraj

Re: How to get index of selected Tree Item

David Crow20-Oct-08 3:49

David Crow

20-Oct-08 3:49

Use CTreeCtrl::GetSelectedItem().

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

how to load bitmap into picture box and static box using MFC?

puppya20-Oct-08 1:42

puppya

20-Oct-08 1:42

I want to load a bitmap from the resource file it is like

CBitmap bitmap;
bitmap.LoadBitmap(IDB_BITMAP);
m_staticBitmap.SetBitmap(bitmap);//m_staticBitmap control variable
but this is not working, bitmap is not getting displayed.
thanks in adv

Re: how to load bitmap into picture box and static box using MFC?

CPallini20-Oct-08 1:58

CPallini

20-Oct-08 1:58

Have your static box the SS_BITMAP style set?
Smile | :)

Fixed hard drive

MsmVc20-Oct-08 1:40

MsmVc

20-Oct-08 1:40

Hi All

How to get fixed hard drive name?There is any function for get fixed hard drive?Plz help me

Re: Fixed hard drive

MsmVc20-Oct-08 2:00

MsmVc

20-Oct-08 2:00

Problem Solved

Automation of excel,word and powerpoint

SRKSHOME20-Oct-08 1:17

SRKSHOME

20-Oct-08 1:17

Hi All,
Is it possible to automate all office applications(ms excel,ms word and power point) in single MFC project? All applications expose many sames classes like _Application. This class is available in all three.
How can I do it? Thanks.

Re: Automation of excel,word and powerpoint

Jose David Pujo20-Oct-08 2:15

Jose David Pujo

20-Oct-08 2:15

Just use the no_namespace keywork in the #import "..."

Then you must refer each function with the namespace before:

#import <c:\app\office\office\excel9.olb> no_namespace
...
Excel::_ApplicationPtr excp;
...

Snapshot using USB PC Camera button

sahoo_susanta20-Oct-08 1:06

sahoo_susanta

20-Oct-08 1:06

Hi,

I am developing a program which is showing video from USB PC Camera.
I want to take picture while I'll press the button present on the USB PC Camera. I have tried a lot but I was unsuccessful. I have used the functions of VFW and done this application.
Any one suggest me how to take the button press event of button present on USB PC Camera????????

Re: Snapshot using USB PC Camera button

Rajesh R Subramanian20-Oct-08 1:15

Rajesh R Subramanian

20-Oct-08 1:15

#1) Stop cross-posting.
#2) Read the guidelines[^].
#3) There's way too less information in your post for anyone to give you a helpful answer.

It is a crappy thing, but it's life -^ Carlo Pallini

Re: Snapshot using USB PC Camera button

Asmaa Khaled FCI11-Dec-09 9:00

Asmaa Khaled FCI

11-Dec-09 9:00

Hi,
I am raelly sorry as i cannot help but i need your help as i need a code take vedio from usb cam and make it pics.
so i would appretiate if u send my e-mail strongwave08@yahoo.com

how to load bitmap in picture box?

puppya20-Oct-08 0:42

puppya

20-Oct-08 0:42

hi,
how to load bitmap in picture box?
thanks in advance

How can I send an eMail (using smtp) to yahoo "free mail services"?

Joseph Marzbani20-Oct-08 0:10

Joseph Marzbani

20-Oct-08 0:10

The most popular "free" mail providers over the Internet are yahoo, hotmail, google and newly "live". But unfortunately I can't send them my email messages using smtp, because I don't know the address of their smtp servers. Can any one introduce me some of them that work with smtp clients like "telnet" or something (I mean those which don't need "webmail" pages over the Internet to send eMail to them)?

Thank you masters!

Re: How can I send an eMail (using smtp) to yahoo "free mail services"?

Roger Stoltz20-Oct-08 0:13

Roger Stoltz

20-Oct-08 0:13

Have a look at Nish's article here[^].

"It's supposed to be hard, otherwise anybody could do it!" - selfquote
"High speed never compensates for wrong direction!" - unknown

CTreeCtrl Problem

Dhiraj kumar Saini20-Oct-08 0:09

Dhiraj kumar Saini

20-Oct-08 0:09

I am using a CTreeCtrl control in my application.
It has a root with all other item as its child. Now what I want is that Whenver a child item is clicked its value should be printed in a edit box.

For this I am using
ON_NOTIFY(NM_CLICK, IDC_TREE_KEN_PUSH,OnSelchangedTreectrl)
event handler and the code is as follows:

void CChatDlg::OnSelchangedTreectrl(NMHDR* pNMHDR, LRESULT* pResult) 
   {
         NM_TREEVIEW* pNMTreeView = (NM_TREEVIEW*)pNMHDR;
         // TODO: Add your control notification handler code here
		 HTREEITEM hItem = m_ctrlKenPush.GetSelectedItem();
         CString strItemText = m_ctrlKenPush.GetItemText(hItem);
		 if(strItemText!=_T("General"))
			SetDlgItemText(IDC_EDIT,strItemText);
         *pResult = 0;
   }

But the problem is that when i click a child node its parent values gets printed .
Please tell whats the problem.

Zero copy on windows

vikramlinux19-Oct-08 23:48

vikramlinux

19-Oct-08 23:48

Hi All,
Is there any facility/API available on windows which will give me file copying functionality where number of copy operations involved are minimal?

Usually kernel mode APIs and DMA stuff creates few number of redudent buffer copy operations. Can we avoid it?

On unix they have such functionality
http://www.linuxjournal.com/article/6345[^]

Re: Zero copy on windows

Jose David Pujo20-Oct-08 1:30

Jose David Pujo

20-Oct-08 1:30

I'm almost sure that there isn't any thing like that in Windows API.

The standard functions: CopyFile, CopyFileEx, MoveFile don't work as you want:

http://msdn.microsoft.com/en-us/library/aa363851(VS.85).aspx[^]

PD: If you find such functionallity please post it. Laugh | :laugh:

Re: Zero copy on windows

Jose David Pujo20-Oct-08 1:59

Jose David Pujo

20-Oct-08 1:59

Hi again, I remembered a way to copy files across network:

TransmitFile Function

The TransmitFile function transmits file data over a connected socket handle. This function uses the operating system's cache manager to retrieve the file data, and provides high-performance file data transfer over sockets.

Note This function is a Microsoft-specific extension to the Windows Sockets specification.

http://msdn.microsoft.com/en-us/library/ms740565(VS.85).aspx[^]

Hope this one works...

Re: Zero copy on windows

vikramlinux20-Oct-08 3:00

vikramlinux

20-Oct-08 3:00

Hey,
That is really a good information. Thanks.

how to draw a line on a dialog based application

puppya19-Oct-08 22:13

puppya

19-Oct-08 22:13

hi,
how to draw line and a small circle below that line on a dialog based application? i want to display 8 such lines on a dialog.
thanks in advance Smile | :)

Re: how to draw a line on a dialog based application

CPallini19-Oct-08 22:23

CPallini

19-Oct-08 22:23

Handle the WM_PAINT message.
Smile | :)

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