C / C++ / MFC Discussion Boards

Re: how can get selected item in list box????

Hamid_RT5-Jul-06 0:22

5-Jul-06 0:22

m_ListBox.GetCurSel(); that return currently selected item
and use m_ListBox.GetText() for retrieves a string from ListBox

whitesky

C++ project HELP

Nirmal Khatri5-Jul-06 0:04

Nirmal Khatri

5-Jul-06 0:04

In my project code i hv these two instruction. please explain thease:-

1. m_CDBFile.write(reinterpret_cast(&m_Header.nNoOfRecords),sizeof(m_Header.nNoOfRecords));

2. nRetVal = MoveFileEx(lpBuffer,lpSystemDir,MOVEFILE_REPLACE_EXISTING);

THANK YOU

Re: C++ project HELP

_AnsHUMAN_ 5-Jul-06 0:10

_AnsHUMAN_

5-Jul-06 0:10

1) 1 st Parameter- _Str
Characters to put into the stream.
You are typecasting m_Header.nNoOfRecords
2 nd Parameter- _Count
Count of characters to put into the stream.
This is self explanatory

2)The nRetVal is used to test if MoveFileEx was successful.The value is non zero in this case
From MSDN
lpExistingFileName // First Parameter to MoveFileEx
[in] Pointer to a null-terminated string that names an existing file or directory on the local computer.
lpNewFileName // Second Parameter to MoveFileEx
[in] Pointer to a null-terminated string that specifies the new name of lpExistingFileName on the local computer.

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: C++ project HELP

Hamid_RT5-Jul-06 0:11

Hamid_RT

5-Jul-06 0:11

MoveFileEx for move a file or directoy and whats m_CDBFile?

whitesky

wi-fi development

everything_sux4-Jul-06 23:43

everything_sux

4-Jul-06 23:43

Hi everyone,

I need to send data from a set of sensors via wi-fi to my PC. Once I have data in the PC, after making some operations with them, I have to send data again to the sensors, where there are a LCD to show a number.

Well, I don't know too much about wi-fi and I want someone to help me and start me in the wi-fi development. And how can I do this work.

Thank you in advance for your help and sorry of my bad english.

Re: wi-fi development

earl5-Jul-06 4:30

earl

5-Jul-06 4:30

If you have an IP network google sockets

earl

Re: wi-fi development

everything_sux5-Jul-06 4:36

everything_sux

5-Jul-06 4:36

Hi again,

Well, I think I need an emitter and a receiver, didn't I? So, with those devices, can I work with IP's?

Re: wi-fi development

earl5-Jul-06 4:39

earl

5-Jul-06 4:39

Um, sorry, I thought you had some devices in mind.

So yes... if you want to send data via Wifi, you're going to need an emitter and a receiver. You should browse manufacturers of such devices and read the docs on their devices.

Re: wi-fi development

everything_sux5-Jul-06 4:43

everything_sux

5-Jul-06 4:43

Hi,

OK, thank you very much, Earl. One last question, Smile | :)

Any suggestion, please?

Thanks so much again.

Re: wi-fi development

earl5-Jul-06 4:46

earl

5-Jul-06 4:46

Sorry, no -- it's not really what I do. Besides, it's going to depend on what type of sensors you have, how much data, how far, etc. Your best bet is probably to find integrated devices, though I do think there are wifi boxes that will let you run code on them that talks over serial, etc. Expensive though.

How to add strings to combobox

vc++_fragrance4-Jul-06 23:17

vc++_fragrance

4-Jul-06 23:17

Hello everybody,
I want to add string values to combobox and in the Data tab i added the srings separating with a semi-colon.In the styles tab i set the Type to dropdown.But while executing i didn't get values.what was the mistake i did?
Please help me.

tejaswini

Re: How to add strings to combobox [modified]

voorugonda prashanth4-Jul-06 23:20

voorugonda prashanth

4-Jul-06 23:20

hi tejaswini,

u should not do like that.

if u seperate the strings with semicolon, it will come as one string.

if u want multiple strings Ctrl + Enter

Re: How to add strings to combobox

Weiye Chen4-Jul-06 23:36

Weiye Chen

4-Jul-06 23:36

tejaswini.g wrote:
But while executing i didn't get values.

It is working fine for me. Is it in the dropdown?

Re: How to add strings to combobox

Hamid_RT4-Jul-06 23:38

Hamid_RT

4-Jul-06 23:38

yes me too

whitesky

Re: How to add strings to combobox

voorugonda prashanth4-Jul-06 23:42

voorugonda prashanth

4-Jul-06 23:42

Yes me toooooooooooooooooooooooooooooooooooo.

Re: How to add strings to combobox

Sarath C5-Jul-06 0:06

Sarath C

5-Jul-06 0:06

voorugonda prashanth wrote:
u should not do like that.

if u seperate the strings with semicolon, it will come as one string.

this is first one

voorugonda prashanth wrote:
Yes me toooooooooooooooooooooooooooooooooooo.

This is second one... seems contradictory to each other.

SaRath.

"It is your attitude, not your aptitude, that determines your altitude - Zig Ziglar."

My Blog | Understanding State Pattern in C++

Re: How to add strings to combobox

vc++_fragrance5-Jul-06 0:31

vc++_fragrance

5-Jul-06 0:31

It's not working with me.It's not with dropdown.I think it's with the version.
I am using visual studio6.0.
And I got solution with Ctrl+Enter.
It's working fine.
thank u

tejaswini

Re: How to add strings to combobox

_AnsHUMAN_ 5-Jul-06 0:01

_AnsHUMAN_

5-Jul-06 0:01

You said that you have the combo box with Type as drop down and adding string in the data box.
Did you go to the resource editor. Click on the arrow button of the combo box and then drag it down to some size to show the drop down list.
If not you will need to do so . Everything else works.

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: How to add strings to combobox

Sarath C5-Jul-06 0:10

Sarath C

5-Jul-06 0:10

In visua studio 6, you should specify the data seperated by "new lines" not with semicolon. you can use Ctrl+Enter for the same purpose.

In Visual Studio 2003, in the property page, we can't add data in new lines, hence we specifies it using ";"

Seems it's clear

SaRath.

"It is your attitude, not your aptitude, that determines your altitude - Zig Ziglar."

My Blog | Understanding State Pattern in C++

How we change the shape of the Button

muravi4-Jul-06 23:14

muravi

4-Jul-06 23:14

How we change the shape of the Button, please help me
thank you,

kanth

Re: How we change the shape of the Button

Hamid_RT4-Jul-06 23:28

Hamid_RT

4-Jul-06 23:28

See Irregular shaped buttons – owner drawn buttons made easy
[^] maybe it is some helpful to you

whitesky

Re: How we change the shape of the Button

ANIL KUMAR SHARMA (INDIA)14-Jul-09 19:12

ANIL KUMAR SHARMA (INDIA)

14-Jul-09 19:12

The question is slightly deviated but related to buttons and dynamic control, so hope i get some clue.
I like to autosize the owner draw button depending upon the text that it load dynamically based on localization strings. so some strings are large than others. Keeping this I override DrawItem in the inherited class from CButton.
The sample code is below

void CMyGraphicButton::DrawItem (LPDRAWITEMSTRUCT lpDrawItemStruct)
{
CString cs;
CString cslong;
ASSERT(lpDrawItemStruct->CtlType == ODT_BUTTON);
LPCTSTR lpszText = (LPCTSTR) lpDrawItemStruct->itemData;
if (!lpszText || lpszText == (LPCTSTR)-1)
{
GetWindowText (cs);
}
else
cs = lpszText;

// now i m trying to resize , so let try to increase the size of button unconditioally
// I get
//lpDrawItemStruct>rcItem.left =0
//lpDrawItemStruct>rcItem.right =75
//lpDrawItemStruct>rcItem.top = 0
//lpDrawItemStruct>rcItem.bottom = 25
//As my button is on extreme right side of dialog so i tried to extend/increase the size of
// button of the left side as follows

lpDrawItemStruct>rcItem.left -= 25 ;

// but the above causes the text to be moved on right side insead of resize/increase the
//button size.

Any idea or help is appriciated.

Thanks
Anil

}

[AKS]

Device Context.

voorugonda prashanth4-Jul-06 23:11

voorugonda prashanth

4-Jul-06 23:11

why CPaintDC not used in other than OnPaint()?

Re: Device Context.

Sarath C4-Jul-06 23:34

Sarath C

4-Jul-06 23:34

for a WM_PAINT messaege we do the drawings withing BeginPaint and EndPaint.

CPaintDC calls BeginPaint at construction time and EndPaint at destruction time.

From MSDN:
CPaintDC objects encapsulate the common idiom of Windows, calling the BeginPaint function, then drawing in the device context, then calling the EndPaint function. The CPaintDC constructor calls BeginPaint for you, and the destructor calls EndPaint. The simplified process is to create the CDC object, draw, and destroy the CDC object. In the framework, much of even this process is automated. In particular, your OnDraw function is passed a CPaintDC already prepared (via OnPrepareDC), and you simply draw into it. It is destroyed by the framework and the underlying device context is released to Windows upon return from the call to your OnDraw function.

SaRath.

"It is your attitude, not your aptitude, that determines your altitude - Zig Ziglar."

My Blog | Understanding State Pattern in C++

Re: Device Context.

voorugonda prashanth4-Jul-06 23:40

voorugonda prashanth

4-Jul-06 23:40

hi sarath,

why it is not working if i use CPaintDc in onLButtonDown()?

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