Help calling and using a functions in visual c++ 6 - C / C++ / MFC Discussion Boards

earl10-Jul-06 5:02

10-Jul-06 5:02

OP: That's a terrible design.

You could, alternatively, do something like a circular buffer of files:
writer writes file data0001
reader reads data0001 and deletes

writer knows it last wrote data0001 so next time it writes data0002, on up to, say, 1000 then loops back to 0.

reader always deletes. This way, the two apps shouldn't get into a race over the same file.

Alternatively, there is a whole body of stuff called IPC for getting data from one process into another. The ones that come to mind are pipes, sockets, and perhaps mailslots.

earl

Re: sharingViolation error

bob1697210-Jul-06 10:52

bob16972

10-Jul-06 10:52

earl wrote:
OP: That's a terrible design.

Your replying to the wrong person. The thread initiator asked a question. I attempted to answer it and reassure them that the debug messages were just informational based upon their design decisions. What they are attempting to accomplish was "By design" as far as there code appeared. Why they choose to design systems this way or that is their business. Not mine.

I'll add suggestions from time to time but only when it's obvious that they will not achieve their objectives based on the code they post. This was not one of those methinks.

Good day.

Re: sharingViolation error

earl10-Jul-06 11:13

earl

10-Jul-06 11:13

Sorry Bob (again Wink | ;)

), that's why I prefixed the response "OP:".

I'm still getting used to threaded / indented slashdot style forums...

CRichEdit right click

YaronNir8-Jul-06 22:48

YaronNir

8-Jul-06 22:48

Right clicking on CEdit pops up a context menu

this behaviour isn't working when using CRichEditCtrl?

any suggestions?

thanks

Yaron

Interface basics click here :
http://www.codeproject.com/com/COMBasics.asp

don't forget to vote Smile | :)

Creating a custom control?

Lord Kixdemp8-Jul-06 16:45

Lord Kixdemp

8-Jul-06 16:45

Hello everyone!
Does anyone have a tutorial on the basics of making MFC controls? I've read some tutorials, but they talk about sending messages and stuff that I don't understand... Basically, this is what I need to do:

A grid control that looks like this:
* No labels at the top.
* Fixed-size grid boxes.
* Colorable boxes. (Basic text formatting will do)
* Remove grid lines (The user can select to add it though)

Can anyone help me? Thanks!

Windows Calculator told me I will die at 28. Frown | :(

Re: Creating a custom control?

Sarath C9-Jul-06 0:50

Sarath C

9-Jul-06 0:50

search CP for Grid Controls.

SaRath.

"Where I am from, there is no plan B. So, take advantage of today becuase tomorrow is not promised. - 50 Cent"

<blink>My Blog | Understanding State Patte

Re: Creating a custom control? [modified]

Lord Kixdemp9-Jul-06 14:12

Lord Kixdemp

9-Jul-06 14:12

Hmm... Isn't there a tutorial that explains the basics on how to do it? The ones I found that looked useful are over 10 thousand lines total... Thanks!

[edit] Nevermind, too complex... I'll just use something else. Thanks! [/edit]

Windows Calculator told me I will die at 28. Frown | :(

-- modified at 20:38 Sunday 9th July, 2006

Help calling and using a functions in visual c++ 6

method0078-Jul-06 12:35

method007

8-Jul-06 12:35

Hi all i am very new to visual c++ . I am using [B]visual studio 6[/B] . So i might ask some simple questions but since i am new i consider you guys bare with me.

I have the following 2 block of codes and i want to be able to call the first one like this :

int pos=-1;
pos=GetPosByNick("name");

I am making a form with a textbox and a button. On the click of the button i want to take the input and place it instead of name in above function call and get the pos value and then use that in my second block of code instead of zero :

(WPARAM)0

so i be happy if an expert tell me step by step what do i need to do to be able to use these blocks of codes. Where to place them , what do i need to declare. Since it is my first attempt to do a program in visual c++ i be happy if an expert give me step by step instrcutions. Thanks

int GetPosByNick(CString szNick) <br />
{ <br />
<br />
HWND hList=NULL;  // List View identifier <br />
<br />
HWND parent,child; <br />
 parent=NULL; <br />
 child=NULL; <br />
 parent = ::FindWindow("My Window Class",NULL); <br />
CString c; <br />
<br />
child =::FindWindowEx(parent,0,"WTL_SplitterWindow",NULL); <br />
child =::FindWindowEx(child,0,"WTL_SplitterWindow",NULL); <br />
child =::FindWindowEx(child,0,"WTL_SplitterWindow",NULL); <br />
child =::FindWindowEx(child,0,"ATL:0053C8D0",NULL); <br />
hList=::FindWindowEx(child,0,"SysListView32",NULL); <br />
<br />
<br />
HWND hwnd=parent; <br />
HWND listview=hList; <br />
<br />
   int count=(int)::SendMessage(listview, LVM_GETITEMCOUNT, 0, 0); <br />
   int i; <br />
<br />
   LVITEM lvi, *_lvi; <br />
   char item[512]; <br />
   char *_item; <br />
   unsigned long pid; <br />
   HANDLE process; <br />
<br />
   GetWindowThreadProcessId(listview, &pid); <br />
   process=OpenProcess(PROCESS_VM_OPERATION|PROCESS_VM_READ|PROCESS_VM_WRITE|PROCESS_QUERY_INFORMATION, FALSE, pid); <br />
<br />
   _lvi=(LVITEM*)VirtualAllocEx(process, NULL, sizeof(LVITEM), MEM_COMMIT, PAGE_READWRITE); <br />
    <br />
   _item=(char*)VirtualAllocEx(process, NULL, 512, MEM_COMMIT, PAGE_READWRITE); <br />
    <br />
<br />
   lvi.cchTextMax=512; <br />
    <br />
    <br />
   for(i=0; i<count; i++) { <br />
      lvi.iSubItem=2; <br />
      lvi.pszText=_item; <br />
      WriteProcessMemory(process, _lvi, &lvi, sizeof(LVITEM), NULL); <br />
      ::SendMessage(listview, LVM_GETITEMTEXT, (WPARAM)i, (LPARAM)_lvi); <br />
<br />
       <br />
      ReadProcessMemory(process, _item, item, 512, NULL); <br />
      //ReadProcessMemory(process, _subitem, subitem, 512, NULL); <br />
       if(item==szNick) <br />
      { <br />
         VirtualFreeEx(process, _lvi, 0, MEM_RELEASE); <br />
          ::CloseHandle(process); <br />
         return i; <br />
      } <br />
       <br />
   } <br />
VirtualFreeEx(process, _lvi, 0, MEM_RELEASE); <br />
 ::CloseHandle(process); <br />
return -1; <br />
<br />
}

Second block of code:

HWND listview=NULL;  // List View identifier <br />
 HWND parent,child; <br />
 parent=NULL; <br />
 child=NULL; <br />
 parent = ::FindWindow("My Window Class",NULL); <br />
<br />
 child =::FindWindowEx(parent,0,"WTL_SplitterWindow",NULL); <br />
 child =::FindWindowEx(child,0,"WTL_SplitterWindow",NULL); <br />
 child =::FindWindowEx(child,0,"WTL_SplitterWindow",NULL); <br />
 child =::FindWindowEx(child,0,"ATL:0053C8D0",NULL); <br />
 listview=::FindWindowEx(child,0,"SysListView32",NULL); <br />
<br />
 LVITEM lvi, *_lvi; <br />
 unsigned long pid; <br />
 HANDLE process; <br />
<br />
 GetWindowThreadProcessId(listview, &pid); <br />
 process=OpenProcess(PROCESS_VM_OPERATION | PROCESS_VM_READ | PROCESS_VM_WRITE, FALSE, pid); <br />
   if(process) <br />
   { <br />
    <br />
   _lvi=(LVITEM*)VirtualAllocEx(process, NULL, sizeof(LVITEM), MEM_RESERVE|MEM_COMMIT, PAGE_READWRITE); <br />
   lvi.mask = LVIF_STATE; <br />
   lvi.state =15; <br />
   lvi.stateMask = LVIS_SELECTED | LVIS_FOCUSED; <br />
<br />
   WriteProcessMemory(process, _lvi, &lvi, sizeof(LVITEM), NULL); <br />
   ::SendMessage(listview, LVM_SETITEMSTATE, (WPARAM)0, (LPARAM)_lvi); <br />
   VirtualFreeEx(process, _lvi, 0, MEM_RELEASE); <br />
   } <br />
 ::CloseHandle(process);

Problem with 2DGraph of Nikolai Teofilov

ensger8-Jul-06 8:15

ensger

8-Jul-06 8:15

Found a great article of Nicloai Teofilov concerning 2D graphs. But I failed in drawing rectangles or circles with his code.

I don't know, how to link t his article, the adress is:

http://www.codeproject.com/miscctrl/ntgraph_activex.asp?forumid=13557&select=1567363&df=100&msg=1567363

Thanks, Gerhard

Re: Problem with 2DGraph of Nikolai Teofilov

Jun Du8-Jul-06 9:46

Jun Du

8-Jul-06 9:46

You should post this message onto that article. Here is the link: http://www.codeproject.com/miscctrl/ntgraph_activex.asp?forumid=13557&select=1567363&df=100&msg=1567363[^]

Best,
Jun

how to detect internet connection availability ?

tns_ranjith8-Jul-06 4:20

tns_ranjith

8-Jul-06 4:20

hi all,

i have a requirement to check the status when internet connection is lost and as well as again reconnected

when i disable and enable network connections it is shown well and good but when internet connection is lost from service provider stil my application shows me internet connection available

is there any other way to dectect internet connection ?

other than using
internetgetconnectedstate() method !

thanks

ranjith

Re: how to detect internet connection availability ?

includeh108-Jul-06 6:16

includeh10

8-Jul-06 6:16

as I know, there is no fast checking.
2 methods are:
(1) ftp - you need to provide a server which you have rights to access, then use ftp to check.
(2) try to "download" a file, but you can stop downloading once download starts because you just need to check connection.
This issue can be done by CInternetConnection.

(1) is faster than (2), but not very fast.
(2) may need only 1 second If internet connection is OK.
But if connection is not OK, you may have to wait for up to a few of minutes to get result - timeout does't work well in the case.

Re: how to detect internet connection availability ?

PJ Arends8-Jul-06 7:44

PJ Arends

8-Jul-06 7:44

http://www.codeproject.com/script/comments/forums.asp?msg=1367563&forumid=1647#xx1367563xx[^]

You may be right
I may be crazy
-- Billy Joel --

Within you lies the power for good, use it!!!

Available/installed RAM

RomTibi8-Jul-06 3:10

RomTibi

8-Jul-06 3:10

How can I determine the available/installed RAM on a machine? In VC++.

Re: Available/installed RAM

Gary R. Wheeler8-Jul-06 3:54

Gary R. Wheeler

8-Jul-06 3:54

GlobalMemoryStatusEx[^]

Software Zen: delete this;

Fold With Us![^]

Re: Available/installed RAM

RomTibi8-Jul-06 5:59

RomTibi

8-Jul-06 5:59

Thanks!

separating strings [modified]

Tara148-Jul-06 3:01

Tara14

8-Jul-06 3:01

Hi,

I have a string formatted somewhere in my program as

Cstring strMain;
strMain.Format("Health: \nWealth");

At some other part of the program, I need 'Health:’ as a separate string and ‘Wealth’ as a separate string. I tried using sscanf but it is not separating the strings.

Cstring s1,s2;
Cstring strOriginal = getmain(); // this gets strMain
Sscanf(strOriginal,"%s: %s",s1,s2);

This give just ‘Health’. i.e. both s1 and s2 hold the string ‘Health’

Please can you tell me the right way?

Fortitudine Vincimus!

-- modified at 9:02 Saturday 8th July, 2006

Re: separating strings

Gary R. Wheeler8-Jul-06 3:59

Gary R. Wheeler

8-Jul-06 3:59

First of all, you can't use pass CString's directly to sscanf. Arguments to sscanf must be pointers.

If you are using the '\n' as the delimiter, you could try something like the following:

CString s1,s2;
CString strOriginal = getmain();
int offset = strOriginal.Find('\n');
if (offset >= 0) {
  s1 = strOriginal.Left(offset);
  s2 = strOriginal.Mid(offset + 1);
}

Software Zen: delete this;

Fold With Us![^]

Re: separating strings

Tara148-Jul-06 5:21

Tara14

8-Jul-06 5:21

Thanks a lot.

Fortitudine Vincimus!

olestd.h , compilation problem in vc++ 7.0

jalsa G8-Jul-06 1:00

jalsa G

8-Jul-06 1:00

hi all,

i am getting following error in vc ++ .net 7.0

fatal error C1083: Cannot open include file: 'olestd.h': No such file or directory

can any one help me to solve this problem ?

Regards

venu

Re: olestd.h , compilation problem in vc++ 7.0

Sarath C8-Jul-06 2:20

Sarath C

8-Jul-06 2:20

for which function, you are referrnig the same file? I strongly believe that, the file is local one(defined for your project).
AFAIK there's no such file named, oldstd.h

SaRath.

"Where I am from, there is no plan B. So, take advantage of today becuase tomorrow is not promised. - 50 Cent"

<blink>My Blog | Understanding State Patte

toolbar and CColorDialog

TranQuangNhat8-Jul-06 0:56

TranQuangNhat

8-Jul-06 0:56

i'd like to see color dialog when i click a button(ID_BORDERCOLOR) on my ToolColor and then i can get color by m_bordercolor in CView.

Thanks

all for development

Re: toolbar and CColorDialog

Sarath C8-Jul-06 2:26

Sarath C

8-Jul-06 2:26

add message handler for ID_BORDERCOLOR, then inside the message handler,
add the code

CColorDialg dlg;
dlg.DoModal();
COLORREF clr = dlg.GetColor();

SaRath.

"Where I am from, there is no plan B. So, take advantage of today becuase tomorrow is not promised. - 50 Cent"

<blink>My Blog | Understanding State Patte

how we can get specitfied port is running or not

johnalek8-Jul-06 0:34

johnalek

8-Jul-06 0:34

hai guys
here i have oneproblem to get the specified port is running or not by
programatically .plz kindely help me in my project

#sankar#

Re: how we can get specitfied port is running or not [modified]

Sarath C8-Jul-06 0:47

Sarath C

8-Jul-06 0:47

are you trying to know the status of a port?

the open (Create of CSocket) on trying to open a port that is already listening.

SaRath.

"Where I am from, there is no plan B. So, take advantage of today becuase tomorrow is not promised. - 50 Cent"

<blink>My Blog | Understanding State Patte

-- modified at 6:48 Saturday 8th July, 2006

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