Re: How to Get Current Running No. Of Threads - C / C++ / MFC Discussion Boards

Re: Missing OnInitDialog()

Robert Palma Jr.18-Jul-05 7:42

Robert Palma Jr.

18-Jul-05 7:42

Many thanks Neelesh Smile | :)

drawing gradient dots or colored in mfc

Assariah kingsly18-Jul-05 5:20

Assariah kingsly

18-Jul-05 5:20

Hallo,
my problem is that I have to read some data (that i generate by rand())and display it in the dialog with a gradient dots or circle(like if the value is low -white and high -red medium-gradient mixed color).
I made a group box and drawn a white rectangle back ground. But i dont know how to repeatedly put ellipses or dots in that space(with gradient).

I hope u people understand my query.

Please help me in this regard.

mfg,
kingsly.

Re: drawing gradient dots or colored in mfc

Christian Graus18-Jul-05 13:05

Christian Graus

18-Jul-05 13:05

If you use GDI+, you can create a gradient brush. Otherwise, SetPixel will do - just change the color gradually. A conversion to HLS will allow you to make the color brighter in a more logical way.

Christian Graus - Microsoft MVP - C++

MS Chart

Marc Soleda18-Jul-05 5:13

Marc Soleda

18-Jul-05 5:13

Hi all,
how can I add data to each MS Chart series during runtime?

Thanks in advance,
Marc Soleda

p.d: what happens with MS Chart?? I can't find documentation...

Building error

phpmb18-Jul-05 5:04

phpmb

18-Jul-05 5:04

Hi everybody

I copied this example from a book on game MFC and it`s give me an error in the liking phase
Linking...
test.obj : error LNK2001: unresolved external symbol __imp__MessageBoxA@16
Debug/test.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.
i know is probably something tedious

tks

B Smile | :)

#define WIN32_LEAN_AND_MEAN

#include <windows.h>
#include <windowsx.h>

int WINAPI WinMain(HINSTANCE hinstance,HINSTANCE hprevinstance,LPSTR lpcmdline,int ncmdshow)
{
// call message box api with NULL for parent window handle
MessageBox(NULL, "THERE CAN BE ONLY ONE!!!","MY FIRST WINDOWS PROGRAM",MB_OK | MB_ICONEXCLAMATION);
// exit program

return(0);
}

Re: Building error

Budric B.18-Jul-05 5:42

Budric B.

18-Jul-05 5:42

The error means the compiler can't find the actual code for the function MessageBox. If you do a quick search for MessageBox on www.msdn.com you will see that to use this function you need:
Header Declared in Winuser.h, include Windows.h
Import library User32.lib

So you included Windows.h somewhere (otherwise you'd get a compile error) and in Project ->Settings -> Link you write in User32.lib.
Try that, I think it should work.

How to Get Current Running No. Of Threads

zinc_z18-Jul-05 4:48

zinc_z

18-Jul-05 4:48

Hi ,

I have made a multithreaded application , Problem is that I want to know how many threads are right now in my application. As user can create as many threads as he wants, on every user request it creates a new instance of mythreadclass , which is inherited from CWinThread . And how to delete these threads when application finishes .

Thanks
ZINC !

HELLO

Re: How to Get Current Running No. Of Threads

Blake Miller18-Jul-05 5:26

Blake Miller

18-Jul-05 5:26

The CreateToolhelp32Snapshot function takes a snapshot of the specified processes in the system, as well as the heaps, modules, and threads used by these processes.

TH32CS_SNAPTHREAD - Includes all threads in the system in the snapshot. To enumerate the threads, see Thread32First. To identify the threads that belong to a specific process, compare its process identifier to the th32OwnerProcessID member of the THREADENTRY32 structure when enumerating the threads.

Use GetCurrentProcessId to get the process id for your program.

error C2146 in Visual C++

PapermillBill18-Jul-05 4:40

PapermillBill

18-Jul-05 4:40

I am learning to use Visual Studio to write C++ programs. The last exercise I did from the book resulted in the message "error C2146: syntax error : missing ';' before identifier 'HwndMSWheel'". What am I doing wrong?

Help!!!

Re: error C2146 in Visual C++

Jose Lamas Rios18-Jul-05 4:54

Jose Lamas Rios

18-Jul-05 4:54

It's hard to guess from the info you provide. Post a code snippet and someone will probably be able to tell you what's wrong in it.

--
jlr
http://jlamas.blogspot.com/[^]

Re: error C2146 in Visual C++

Anonymous18-Jul-05 7:10

Anonymous

18-Jul-05 7:10

This was an exercise to learn to create an application window. Here is the code, a very short program.

// EX13_01.CPP
// An elementary MFC program
#include <afxwin.h> // For the class library

// Application class definition

class COurApp:public CWinApp
{
public:
virtual BOOL InitInstance();
};

//Window class definition
class COurWnd:public CFrameWnd
{
public:
// Class constructor
COurWnd()
{
Create(o, "Our Dumb MFC Application");
}
};

// Function to create an instance of the main window
BOOL COurApp::InitInstance(void)
{
// Construct a window object in the free store
m_pMainWnd = new COurWnd;
m_pMainWnd->ShowWindow(m_nCmdShow); // .. and display it
return TRUE;
}

// Application object definition at global scope

COurApp AnApplication; // Define an application object

Re: error C2146 in Visual C++

Jose Lamas Rios18-Jul-05 7:19

Jose Lamas Rios

18-Jul-05 7:19

Anonymous wrote:
This was an exercise to learn to create an application window. Here is the code, a very short program.

But this isn't the file in which you were getting a compilation error, is it? You said the error was "error C2146: syntax error : missing ';' before identifier 'HwndMSWheel'" and I can't see HwndMSWheel anywhere in the code you posted...

--
jlr
http://jlamas.blogspot.com/[^]

Re: error C2146 in Visual C++

David Crow18-Jul-05 8:04

David Crow

18-Jul-05 8:04

How about:

COurWnd::COurWnd()
{
}
 
BOOL COurApp::InitInstance(void)
{
    COurWnd *pMainWnd = new COurWnd;
    m_pMainWnd = pMainWnd;
    pMainWnd->LoadFrame(IDR_MAINFRAME, WS_OVERLAPPEDWINDOW, NULL, NULL);
    pMainWnd->ShowWindow(m_nCmdShow);
    pMainWnd->UpdateWindow();
    return TRUE;
}

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

transparent printing problem with hp plotter and gdi+

navajo_2k18-Jul-05 3:15

navajo_2k

18-Jul-05 3:15

Hi there...

I've been trying to print some graphics done with gdi+..

ForExample:

Graphics graphics(pDC->m_hDC);<br />
graphics.FillRectangle(&(SolidBrush(Color(255,2,90,50))),10,10,400,300);<br />
graphics.FillEllipse(&(SolidBrush(Color(100,255,255,100))),10,10,300,300);

On my screen it looks exactly like want it to...but when i'm trying to print it on our
HP1050C Plotter the alpha transparent areas were opaque..

Does anyone know this problem??

Re: transparent printing problem with hp plotter and gdi+

Shog⁹18-Jul-05 12:31

Shog⁹

18-Jul-05 12:31

Probably a driver issue. Try drawing to a memory bitmap, then blitting this to the printer DC (assuming the printer driver supports blitting).

----------------------------------------
the ocean is full because everyone's crying

Re: transparent printing problem with hp plotter and gdi+

navajo_2k19-Jul-05 0:05

navajo_2k

19-Jul-05 0:05

Yes, it's probably a driver issue...

But this just a little demo i wrote... actual i tested it for our GIS-Software...
and there i can't just draw it into a membitmap...the memory would blow up^^
btw. pls. excuse my bad english...)

How to Take Input from MS flex Grid

Ritu Kwatra18-Jul-05 1:41

Ritu Kwatra

18-Jul-05 1:41

Hi all,
I am using MS flex grid to show my application data. There is a point when I need to Input from the user so that I can proceed the working. What I am doing is I have placed an edit box control at design time. Then I get pointer to it using GetDlgItem. and then I am calling SetWindowPos function to display it on a specific cell of the grid. But the edit box do not get displayed.
My code looks like:
CEdit *m_pEditValue = (CEdit*) GetDlgItem(IDC_EDIT_VALUE);
m_pEditValue->SetWindowText("Displayed");
m_pEditValue->SetWindowPos(&wndTop,m_flexgrid.GetCellLeft(),m_flexgrid.GetCellTop(),m_flexgrid.GetCellWidth(),m_flexgrid.GetCellHeight(),SWP_SHOWWINDOW);

The program does not give any error but It does not show the edit box. I think it is behind the grid and that means &wndTop is not making it a topmost window.

Any suggestion please ? Confused | :confused:

Thanx in advance.

Ritu Kwatra

FILE I/O updating

Halawlaws18-Jul-05 1:27

Halawlaws

18-Jul-05 1:27

hi i have used:
FILE *new = fopen("bla.txt","r+");
to edit a file that i have created earlier.

i need now to delete the last line in the file and add a new one.

How can i do that without overwriting the old line?

/\|-||\/|/\|)

Re: FILE I/O updating

David Crow18-Jul-05 2:43

David Crow

18-Jul-05 2:43

Halawlaws wrote:
i need now to delete the last line in the file and add a new one.

How can i do that without overwriting the old line?

These two requirements contradict each other. Deleting a line and replacing it with another is the same as overwriting.

If the old and new lines are the same length, just use fseek() to position the file pointer to the beginning of the line. Otherwise, you'll need to read each line in the file into a temporary file sans the last line. Write the new line to the temporary file. Close both files. Delete the original file. Rename the temporary file. Make sense?

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: FILE I/O updating

Halawlaws18-Jul-05 3:05

Halawlaws

18-Jul-05 3:05

hey

I can't use fseek coz they have different size so i will try the second method only how can i delete the original file and rename the temporary one.
What functions do i use?

/\|-||\/|/\|)

Re: FILE I/O updating

David Crow18-Jul-05 3:11

David Crow

18-Jul-05 3:11

Halawlaws wrote:
...how can i delete the original file and rename the temporary one.
What functions do i use?

remove() and rename() come to mind.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: FILE I/O updating

Halawlaws18-Jul-05 4:46

Halawlaws

18-Jul-05 4:46