C / C++ / MFC Discussion Boards

Handle of child windows

Max++26-Oct-06 4:26

Max++

26-Oct-06 4:26

What the function use for get handle of child windows.

Re: Handle of child windows

Jonathan [Darka]26-Oct-06 5:05

Jonathan [Darka]

26-Oct-06 5:05

You could use either:

EnumChildWindows()

or

HWND hChildWindow = GetWindow(hThisHWnd, GW_CHILD);

Darka [Xanya]

"I am not a slave to a god that doesn't exist."

Re: Handle of child windows

Stephen Hewitt26-Oct-06 13:30

Stephen Hewitt

26-Oct-06 13:30

If you know the ID of the child you can use GetDlgItem. It works for any window, not just dialogs.

Steve

sending address of a variable to the parent

prithaa26-Oct-06 4:20

prithaa

26-Oct-06 4:20

Hi,

void C1View::OnViewIncomeview()
{
AfxGetMainWnd()->SendMessage(WM_COMMAND, ID_FILE_NEW);
CMDIFrameWnd *pFrame =
(CMDIFrameWnd*)AfxGetApp()->m_pMainWnd;
CMDIChildWnd *pChild =
(CMDIChildWnd *) pFrame->GetActiveFrame();
CView *pView = (CView *) pChild->GetActiveView();
CEdit *r1 = new CEdit;
r1->Create(WS_CHILD|WS_VISIBLE|ES_AUTOVSCROLL,
CRect(x1,y1,x2,y2), pView, 1);
CEdit *r2 = new CEdit;
r2->Create(WS_CHILD|WS_VISIBLE|ES_AUTOVSCROLL,
CRect(x3,y3,x4,y4), pView, 1);
r1->SetFocus();
}

I have this piece of code in a function of a called by the application when an icon is clicked on the toolbar.

Now if I go to some other function of the same class and that function moves the caret from one edit box to another
What has to be done?
Thanks
Prithaa

Serial Port Question

Programm3r26-Oct-06 3:52

Programm3r

26-Oct-06 3:52

Hi all,

Could someone please help me with the following problem:

How can I wait for a acknowledgement from another device when I have sent it a piece of data throught the serial port. (before sending the next piece of data).

I'm using VS2K5, and I have done the following:

<br />
..... looping .....<br />
array<String^>^ Text = gcnew array<String^>(10000);<br />
<br />
if (!serialPort1->IsOpen){	<br />
  serialPort1->PortName = portNum;					 <br />
  serialPort1->BaudRate = 9600;<br />
  serialPort1->Open();<br />
}<br />
<br />
serialPort1->Write(Text[x]);<br />
<br />
:confused: ..... wait for ack ..... :confused:<br />
<br />
array<wchar_t>^ buffer = gcnew array<wchar_t>(10000);<br />
serialPort1->Read(buffer,x,sizeof(buffer));<br />

Thank you in advance

The only programmers that are better than C programmers are those who code in 1's and 0's..... Smile | :)

Programm3r

Re: Serial Port Question

Cedric Moonen26-Oct-06 3:57

Cedric Moonen

26-Oct-06 3:57

You can set a timeout for the reading: you'll wait until either all the data arrived or the timeout expired.
Check out the SetCommTimeout[^] function and the COMMTIMEOUT[^] structure.

Cédric Moonen
Software developer

Charting control [Updated - v1.1]

Re: Serial Port Question

Programm3r26-Oct-06 3:59

Programm3r

26-Oct-06 3:59

Thanx Cedric ... I'll have a look

The only programmers that are better than C programmers are those who code in 1's and 0's..... Smile | :)

Programm3r

how to detect server closed abnormally,

Jetli Jerry26-Oct-06 3:00

Jetli Jerry

26-Oct-06 3:00

hi all,

I am having non-blocking TCP socket, trying to receive in a loop for requried bytes.

I am disconnectiing server by removing n/w cable from m/c running server application.

every time recv() fails with WSAWOULDBLOCK, why?

How can i detect that server died abnormally at client end?

recv() also not returning 0?

following is code

iMode = 1; // non-zero = non-blocking mode
iResult = ioctlsocket(sockMain,FIONBIO,(u_long FAR*)&iMode);

iDataGot=0;
while ( iData2Recv >= iDataGot )
{
// recv single byte at a time
iResult = recv(sockMain,&chData,1,0);

// if zero byte got or any other error
if ( iResult == 0 )
{
//never reach here
break;
}

/* timeout scheme
// check timeout period
DWORD dwCur = GetTickCount();
if ( dwCur > dwTimeout )
{
// timeout occured, so we failed
break;
}
*/

if ( iResult == SOCKET_ERROR )
{
if ( WSAGetLastError() != WSAEWOULDBLOCK )
{
// never reaches here
break;
}
else
{
// always executed.
continue;
}
}

// we got something add into output string
if ( iResult == 1 )
{
// add data,update counter into string and break if all datalen is received.
}

client application calls receive() after 10sec and it timeouts after 10sec if no data arrived. I want eliminate later 10sec. and detect server has died.

Thanks in advance.

Jetli
Constant Thing In World Is Change.

VC++ with Linux or Unix

prithaa26-Oct-06 2:59

prithaa

26-Oct-06 2:59

Hi,

Can VC++ work with Linux or Unix?
Or VC++ works only with Winodws?

Prithaa

Re: VC++ with Linux or Unix

Maximilien26-Oct-06 3:01

Maximilien

26-Oct-06 3:01

prithaa wrote:
Can VC++ work with Linux or Unix?

no.

prithaa wrote:
Or VC++ works only with Winodws?

yes.

Maximilien Lincourt
Your Head A Splode - Strong Bad

Re: VC++ with Linux or Unix

prithaa26-Oct-06 3:07

prithaa

26-Oct-06 3:07

Hi,
What are the other alternatives of C++ with Unix or Linux
other than Java to handle Visual side of an application

Prithaa

Re: VC++ with Linux or Unix

Cedric Moonen26-Oct-06 3:22

Cedric Moonen

26-Oct-06 3:22

prithaa wrote:
What are the other alternatives of C++ with Unix or Linux

You asked about VC++ not C++. C++ is totaly cross-platform. VC++ is not. The difference is that VC++ contains library that can only target windows operating system (basically).

If you want to have a cross-platform GUI, take a look at wxWidgets[^], it is 'similar' to MFC.

Cédric Moonen
Software developer

Charting control [Updated - v1.1]

Re: VC++ with Linux or Unix

Nemanja Trifunovic26-Oct-06 3:40

Nemanja Trifunovic

26-Oct-06 3:40

prithaa wrote:
What are the other alternatives of C++ with Unix or Linux
other than Java to handle Visual side of an application

Pick your weapon.[^]

Programming Blog
utf8-cpp

Re: VC++ with Linux or Unix

toxcct26-Oct-06 4:05

toxcct

26-Oct-06 4:05

vi, ÔÔÔÔÔ vi... (say vee-ay)

what, weren't we talking about powerful GUIs ? Laugh | :laugh:

You don't know where to start ? ask a good friend

[VisualCalc 3.0][Flags Beginner's Guide]

Re: VC++ with Linux or Unix

Kevin McFarlane26-Oct-06 5:06

Kevin McFarlane

26-Oct-06 5:06

Eiffel is one. Though the most-advanced IDE for it (EiffelStudio) is very expensive for commercial code, unless your product is open source in which case it is free.

Kevin

Re: VC++ with Linux or Unix

markkuk26-Oct-06 12:02

markkuk

26-Oct-06 12:02

You can use C++ in Linux and Unix, just not the Microsoft Visual C++ IDE. Try Eclipse CDT[^] or KDevelop[^] if you need a graphical IDE.

Re: VC++ with Linux or Unix

toxcct26-Oct-06 3:03

toxcct

26-Oct-06 3:03

Why asking twice ? couldn't you wait for 10 minutes ? Unsure | :~

You don't know where to start ? ask a good friend

[VisualCalc 3.0][Flags Beginner's Guide]

Re: VC++ with Linux or Unix

prithaa26-Oct-06 3:12

prithaa

26-Oct-06 3:12

Hi,
Sorry
but I did not ask twice.It just happened that the network was not working properly and the Post message got clicked twice
Sorry again
Prithaa

Re: VC++ with Linux or Unix

Nemanja Trifunovic26-Oct-06 3:08

Nemanja Trifunovic

26-Oct-06 3:08

prithaa wrote:
Can VC++ work with Linux or Unix?

No.

Having said that, a friend of mine is using VC++ IDE to develop a Linux application. He edits files with VC++, and than uses g++ from Linux on VMWare to compile them and debug them (VMWare enables shared folders between the host and guest OS).

Programming Blog
utf8-cpp

Re: VC++ with Linux or Unix

David Crow26-Oct-06 3:25

David Crow

26-Oct-06 3:25

Technically, your friend's code is C++, not VC++. The 'V' part of the name is what makes it Windows vs. non-Windows. Visual Studio is the default editor for VC++.

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Re: VC++ with Linux or Unix

Nemanja Trifunovic26-Oct-06 3:38

Nemanja Trifunovic

26-Oct-06 3:38

Agree. That's why my response was "No".

Programming Blog
utf8-cpp

Re: VC++ with Linux or Unix

David Crow26-Oct-06 3:42

David Crow

26-Oct-06 3:42

Nemanja Trifunovic wrote:
That's why my response was "No".

And prithaa was supposed to figure all of that out by reading "no?" Roll eyes | :rolleyes:

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Refresh Backgroundcolor

baerten26-Oct-06 2:57

baerten

26-Oct-06 2:57

Hi, it's me at new D'Oh! | :doh:

I change the background color of my CFormView like this :

m_bgrBrush.CreateSolidBrush(*TheColor); // *TheColor is a DWORD RGB(x,x,x) from a class in the mainframe

HBRUSH MyView::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
HBRUSH hbr = CFormView::OnCtlColor(pDC, pWnd, nCtlColor);

if((nCtlColor == CTLCOLOR_STATIC) || (nCtlColor == CTLCOLOR_DLG) )
{

pDC->SetBkColor(*TheColor);
return (HBRUSH) m_bgrBrush;
}

return hbr;
}

Now i want to change the background color at runtime.

A Invalitade() or RedrawWindow() doesn't change the color at runtime

Thanks Smile | :)

Re: Refresh Backgroundcolor

Hamid_RT26-Oct-06 19:34

Hamid_RT

26-Oct-06 19:34

Do you want to change color of background if yes you need to insert new color

WhiteSky

Re: Refresh Backgroundcolor

ThatsAlok27-Oct-06 22:21

ThatsAlok

27-Oct-06 22:21

baerten wrote:
pDC->SetBkColor(*TheColor);

you have to change TheColor color accordingly

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
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