C / C++ / MFC Discussion Boards

susanne13-Aug-09 3:09

3-Aug-09 3:09

okay but i got an application crash hier:

#ifdef _DEBUG
void CTestView::AssertValid() const
{
CView::AssertValid();
}

#ifndef _WIN32_WCE
void CTestView::Dump(CDumpContext& dc) const
{
CView::Dump(dc);
}
#endif
#endif

Re: UINT ThreadProc(LPVOID param)

Richard Andrew x643-Aug-09 4:10

Richard Andrew x64

3-Aug-09 4:10

Do you have a valid CTestView object before starting your thread?

If not, that will cause this crash.

saving file in unicode format

Rakesh531-Jul-09 1:47

Rakesh5

31-Jul-09 1:47

Hi all,

I am writing contents from an application into a notepad file.. i have used fwrite function... but the file is not saving in unicode format as default...

i want the file to be saved in unicode format...can anyone guide me how to make it through?

Thanks,
Rakesh.

Re: saving file in unicode format

HimanshuJoshi31-Jul-09 2:01

HimanshuJoshi

31-Jul-09 2:01

Here is a nice article that explains it for C++ High Performance Unicode Text File I/O Routines for C++[^]

latest version of Dr. Watson, the dump must be suitable to open ind VS 2005 Team edition

ptr_Electron31-Jul-09 1:32

ptr_Electron

31-Jul-09 1:32

can you please update me the latest version of Dr. Watson, the dump must be suitable to open ind VS 2005 Team edition.

I had older version of Dr. Watson installed, and the dump created with the version is not supported in VS 2005. I get below error msg, Please advice

---------------------------
Microsoft Visual Studio
---------------------------
Unable to start program 'C:\.........\DebugMDd\user8.dmp'.

Debugging older format crashdumps is not supported.
---------------------------
OK
---------------------------

Re: latest version of Dr. Watson, the dump must be suitable to open ind VS 2005 Team edition

Randor 31-Jul-09 15:52

Randor

31-Jul-09 15:52

Hi ptr_Electron,

I believe you just need to download the latest version of Debugging Tools for Windows[^]. I believe Dr. Watson is available in the Extra Tools installation.

Debugging Tools for Windows[^]

Best Wishes,
-David Delaune

ExcludeClipRect

kumar sanghvi31-Jul-09 1:21

kumar sanghvi

31-Jul-09 1:21

Hi,
i when exactly ExcludeCliprect is usefull.. i had a look in msdn it was as follows but i do not know what is a clipping region..
Creates a new clipping region that consists of the existing clipping region minus the specified rectangle.

Re: ExcludeClipRect

CPallini31-Jul-09 1:31

CPallini

31-Jul-09 1:31

kumar sanghvi wrote:
but i do not know what is a clipping region..

See here and here.
Smile | :)

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]

problem in reading characters from a file..

Rakesh531-Jul-09 1:08

Rakesh5

31-Jul-09 1:08

Hi all,

i am making my application unicode supporting one. i have to read content from a file..(say a notepad file)..

i have the contents in this format: "rakesh","male"
"shekar","male" etc.,

When i read the content, it is reading as "rakesh","male"(one squarebox)". when i debugged, i found the hexadecimal value of the box as FEFF which is UNICODE_BOM value..(if i am correct)..

So,after some operations(trim operations),it will come as "rakesh","male"" which leads my final output as rakesh" , male;

how to get rid of that square box? why is it coming actually? if i remove that square box, i can overcome this double quote prob. i think...

Please let me know if am unclear in my question..

Thanks,
Rakesh.

Re: problem in reading characters from a file..

Rajesh R Subramanian31-Jul-09 6:48

Rajesh R Subramanian

31-Jul-09 6:48

Someone might be able to offer you help if you show your code.

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

Re: problem in reading characters from a file..

Bacon Ultimate Cheeseburger1-Aug-09 1:10

Bacon Ultimate Cheeseburger

1-Aug-09 1:10

It sounds like you are make a call to fgetws() or a similar function which doesn't remove the new line character at the end of the string.

Adding VBA user interface to MFC application

ulretsam31-Jul-09 0:58

ulretsam

31-Jul-09 0:58

Hello all,
I would like to ask for an example or documentation how to add the VBA editor to my MFC application (like Excel and Word and other apps (not just MS) do).

Thanks a lot for your support
ulretsam

Re: Adding VBA user interface to MFC application

Randor 31-Jul-09 16:00

Randor

31-Jul-09 16:00

Hi ulretsam,

This Help and Support article demonstrates how to host the VBScript DLL:

SAMPLE: MFCAxs.exe Implements an Active Script Host Using MFC[^]

Best Wishes,
-David Delaune

display 256 color bitmap image

adichavan31-Jul-09 0:42

adichavan

31-Jul-09 0:42

plzzzzzzzzz help me i read 256 bitmap image in the form of array & i display it but while displaying it not shows its actuall colors .It means it shows blue color at the place of red & white color at the place of yellow & so on I set the VGA graphics mode & use putpixel() & setcolor() graphics functions i want to use this functions onli cause it gives other information coractlly so plzzz tell me how can i display it?

Re: display 256 color bitmap image

Adam Roderick J31-Jul-09 0:45

Adam Roderick J

31-Jul-09 0:45

please read below one
http://www.cs.colorado.edu/~main/bgi/doc/initgraph.html[^]

Величие не Бога может быть недооценена.

Re: display 256 color bitmap image

adichavan31-Jul-09 0:56

adichavan

31-Jul-09 0:56

hiiiiiiiiii thanx for sending me code but actualy i use the same methode only initialising graphics mode
EGA which supports 16 colors but i want to put 256 colors plz help for this code i want to display image which I read from hard disk right now my sample image is of tiger which gives correct shape & size it puts colors also but with wrong colors like white insted of yellow etc........

Re: display 256 color bitmap image [modified]

Adam Roderick J31-Jul-09 1:03

Adam Roderick J

31-Jul-09 1:03

do u wnat to load bitmap from a file?
if so please check

http://www.brackeen.com/vga/bitmaps.html[^]

Величие не Бога может быть недооценена.

modified on Friday, July 31, 2009 7:13 AM

Re: display 256 color bitmap image

adichavan31-Jul-09 1:21

adichavan

31-Jul-09 1:21

no i had allready load the image put it in array form also now i want to show it on output window .See i read the image file using fopen ,fread functioss also read its header & i can display it on the o/p successfully but the color information is wrong it shows wrong shades of color so i can understand now which graphics mode or function shall i use to put proper colors in image only color shades of my image are wrong like background in original image is red & in my o/p image it is blue also tiger color it shows gray & white likewise.

Re: display 256 color bitmap image

Adam Roderick J31-Jul-09 1:45

Adam Roderick J

31-Jul-09 1:45

refer this
http://www.brackeen.com/vga/bitmaps.html[^]

Величие не Бога может быть недооценена.

Re: display 256 color bitmap image

adichavan31-Jul-09 19:40

adichavan

31-Jul-09 19:40

thanx man but i have to use only graphics mode this code is run only on vga i am using graphics .h header & i can show my image properly only the problem is that it not shows colors perfectly i allready mention like it shows blue color in the portion of red color & so on its i use ega mode or vga mode & putpixel()
function to put the proper color pixels i had allready studied this all codes & now my program is working properly only color problem thats all byeeeeeeeeee............ Smile | :)

Thread Event Objects

susanne131-Jul-09 0:25

susanne1

31-Jul-09 0:25

Hallo i have the following problem:

i need to start and end a thread by using Event Objects in MFC, following is the code in the ThreadView.cpp:

Event m_threadStart;

Event m_threadEnd;

ON_MESSAGE(WM_CREATE, OnCreate) // causes a casting problem

void CThreadView::OnStartThread()
{
m_threadStart.SetEvent ();
}

void CThreadView::OnStopThread()
{
m_threadEnd.SetEvent ();
}

int CThreadView::OnCreate(LPCREATESTRUCT lpCreateStruct) // defined in ThreadView.h liks this: afx_msg OnCreate(LPCREATESTRUCT lpCreateStruct)
{
HWND hWnd = GetSafeHwnd();

AfxBeginThread(ThreadProc, hWnd, THREAD_PRIORITY_NORMAL);

return 0;
}

LONG CThreadView::OnThreadended(WPARAM wParam, LPARAM lParam)
{
CString strThreadEnd = _T("Thread ended.");

AfxMessageBox(strThreadEnd, 0,0);

return 0;
}

UINT ThreadProc(LPVOID param)
{
CString strThread_Start = _T("Thread aktiviert.");
CString strThread_Stop = _T("Thread deaktiviert.");
CString strThread_Caption = _T("Thread");

::WaitForSingleObject(m_threadStart.m_hObject , INFINITE);

::MessageBox((HWND)param, strThread_Start, strThread_Caption, MB_OK);

bool bKeepRunning = true;

while(bKeepRunning)
{
int nResult = ::WaitForSingleObject (m_threadStart.m_hObject ,0);

if(nResult == WAIT_OBJECT_0)
bKeepRunning = false;
}

::PostMessage((HWND)param, WM_THREADENDED, 0, 0);

return 0;
}

First the Compiler bring an error c2440: ON_MESSAGE(WM_CREATE, OnCreate) // causes a casting problem
I can not cast.

Something is terribly wrong with this code , please help.

Re: Thread Event Objects

«_Superman_»31-Jul-09 0:56

«_Superman_»

31-Jul-09 0:56

For custom messages that are mapped using ON_MESSAGE the handler must have a signature that returns an LRESULT and takes 2 parameter of WPARAM and LPARAM.

So your OnCreate function must look like this -
LRESULT CThreadView::OnCreate(WPARAM wParam, LPARAM lParam);

«_Superman_»
I love work. It gives me something to do between weekends.

Re: Thread Event Objects

Garth J Lancaster31-Jul-09 1:02

Garth J Lancaster

31-Jul-09 1:02

have a look at this

http://msdn.microsoft.com/en-us/library/k35k2bfs(VS.80).aspx[^]

look carefully at "The type of the function must be afx_msg LRESULT (CWnd::*)(WPARAM, LPARAM).", their example

// implementation for WM_MYMESSAGE handler
LRESULT CMyWnd::OnMyMessage( WPARAM wParam, LPARAM lParam ) 
{
   // ... Handle message here
   return 0L;
}

vs yours ..

int CThreadView::OnCreate(LPCREATESTRUCT lpCreateStruct)

interestingly, your "OnThreadended" ie

LONG CThreadView::OnThreadended(WPARAM wParam, LPARAM lParam) 
{
CString strThreadEnd = _T("Thread ended.");

AfxMessageBox(strThreadEnd, 0,0);

return 0;
}

appears ok

Re: Thread Event Objects

susanne131-Jul-09 2:22

susanne1

31-Jul-09 2:22

Thanks for your help.

Can you tell me please how can call or access a global variable or a function defined in th Doc.cpp or anyaother class from inside UINT ThreadProc (LPVOID param)?

UINT ThreadProc(LPVOID param)
{
CTestDoc* pDoc = GetDocument(); // error: GetDocument() is not defined???
ASSERT_VALID(pDoc);

::WaitForSingleObject(m_Thread_Sel_Start.m_hObject , INFINITE);

::MessageBox((HWND)param, strThread_Start, strThread_Caption, MB_OK);

CSQLCommand::FindSQLCmd(pDoc,m_strSelect);// error :m_strSelect is defined in the CTestView.h but he can not find it , pDoc is already unkown

bool bKeepRunning = true;

while(bKeepRunning)
{
int nResult = ::WaitForSingleObject (m_Thread_Sel_End.m_hObject ,0);

if(nResult == WAIT_OBJECT_0)
bKeepRunning = false;
}

::PostMessage((HWND)param, WM_THREADENDED, 0, 0);

return 0;
}

Can i define the UINT ThreadProc(LPVOID param) in the CTestDoc.cpp?
And why when i declare UINT ThreadProc(LPVOID param) in the CTestView.h i get this error:
error C3867: "CTestView::ThreadProc": use "&CTestView::ThreadProc".

and when i use &CTestView::ThreadProc i get a csting problem that can not be solved through an explict cast.

match the character of a string

vikas choudhry31-Jul-09 0:04

vikas choudhry

31-Jul-09 0:04

hii all

its a C Programme.
i need to check characters in a string(character pointer)so that i can diffrenciate my strings for alphabatic character and numeric character.
there are scenerios where i have to invalidate string containing even a single alphabatic character.
and in other scenarios i have to invalidate those strings which contain even a single numeric character.

i am new in this C field so please provide me code to implement it.

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