Re: plotting in Visual Studio C++ - C / C++ / MFC Discussion Boards

Re: Ftprenamefile error 12003!!!

Michael Dunn12-Apr-06 15:20

12-Apr-06 15:20

ERROR_INTERNET_EXTENDED_ERROR
An extended error was returned from the server. This is typically a string or buffer containing a verbose error message. Call InternetGetLastResponseInfo to retrieve the error text.

--Mike--
Visual C++ MVP Cool | :cool:

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C++ Mouse Event Listener

jonesap512-Apr-06 12:43

jonesap5

12-Apr-06 12:43

I am trying to create an event listener for a left mouse button event in c++. Does anyone have any idea how to create this so that I can register the listener at the beginning and then when the event happens it will call a function of what I want to happen. If this makes no sense let me know.

Thanks

Re: C++ Mouse Event Listener

bob1697212-Apr-06 14:22

bob16972

12-Apr-06 14:22

If VC++ 6.0, use the ClassWizard and set up a member function for WM_LBUTTONDOWN.

If VC++ 7.1, don't use the Classwizard ('cause it 'taint there) and set a handler for WM_LBUTTONDOWN

If your using VC .NET, I haven't the clue. It's too safe for me anyway.;P
(In .NET it's probably in the System.Computer.Actions.Mouse.MouseActions.ButtonActions.PressedActions.LeftButton.Down namespace or something hideously long like that)

-- modified at 20:25 Wednesday 12th April, 2006

How to convert CString to char

masnu12-Apr-06 11:53

masnu

12-Apr-06 11:53

I need to get text from my Edit Controls, which are CString types, and convert them to char arrays which I later store in the header of my binary file. I can do this easily if I specify my character set to be Non Unicode and use strcpy. The problem when I do this is that all my dialogs and buttons revert back to the Windows 2000 style, rather than the WinXP style. It is not really a bid deal, but I would like the application to look as up to date as possible.

Can anyone tell me how to convert CStrings into char arrays, using Unicode, or how to get WinXP dialogs with a Non Unicode character set? What I am getting at may be a little vague so let me know if you need me to explain it in more detail.

Any help is appreciated. Thank you!

Re: How to convert CString to char

James R. Twine12-Apr-06 14:43

James R. Twine

12-Apr-06 14:43

   If all you need to do is copy the data from the CString and write it to a file, you do not need to copy the contents of the string to a non-const buffer. CString objects have a LPCTSTR operator, which means that you can use it in place of a const TCHAR *.

   Since the CString class is TCHAR-based, it supports Unicode. You can convert the string to ANSI for writing it to a file using the ATL Conversion Macros (T2CA) if the data is not too large, or calling WideCharToMultiByte(...) yourself with your own buffer(s).

   Also, if you get into the habit of using the TCHAR-based string functions, you life may get easier (i.e. using _tcscpy(...) instead of strcpy(...)).

   Look up how to create (and optionally embed) a common control manifest file; that should help you with getting the XP-style controls back into the application when running it in ANSI mode.

-=- James

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Re: How to convert CString to char

Hamid_RT12-Apr-06 20:44

Hamid_RT

12-Apr-06 20:44

Hi masnu,
maybe it is some helpful to you
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dv_wceatl4/html/ealrfStringConversionMacros.asp[^]

plotting in Visual Studio C++

ilda lapi12-Apr-06 11:14

ilda lapi

12-Apr-06 11:14

hello Everyone,
I am a beginner in Visual Studio C++.
In all I have read till know I can't find an example of how to plot,
let say i have x=[1 3 7 ] and y=[7 9 10]
i want to build an application where i press the button PLOT and it plots y versus x in circle (or line) in and a given color
I would really appreciate your help.

thanks again

Re: plotting in Visual Studio C++

masnu12-Apr-06 12:06

masnu

12-Apr-06 12:06

You have to research device contexts. All "plotting", or any graphical output for that matter, in Windows is accoplished through a device context.

 CDC *pDC;<br />
<br />
pDC->MoveTo(x1, y1);     //Move to point(x1,y1)<br />
pDC->LineTo(x2,y2)             //Draw a line from (x1,y1) to (x2,y2)<br />
pDC->Ellipse();                //Draw an ellipse (circle)<br />
pDC->Rectangle();              //Draw a rectangle

There are many more features to device contexts which should allow you to do what you want. Any good Visual C++ book should talk about DC and I know this web site has A LOT of useful examples.

Hope that helps.

Paul

Re: plotting in Visual Studio C++

El Corazon12-Apr-06 13:28

El Corazon

12-Apr-06 13:28

ilda lapi wrote:
I am a beginner in Visual Studio C++.
In all I have read till know I can't find an example of how to plot,

In addition to the post on DC, you can also change that context into either an OpenGL or Direct3D display, thus allowing you a full range of very low-level drawing functions.

and there are additional methods such as GDI+ depending on your needs. http://www.codeproject.com/miscctrl/pgllib.asp[^]

there are actually quite a few ways to do plotting through various frameworks to libraries.

_________________________
Asu no koto o ieba, tenjo de nezumi ga warau.
Talk about things of tomorrow and the mice in the ceiling laugh. (Japanese Proverb)

Device drivers: MSVAD sample drivers

imsaady12-Apr-06 10:04

imsaady

12-Apr-06 10:04

I have to develop a device driver for windows NT that will add a virtual audio device to the system. i need to hook up and capture the audio stream coming from microphone and send it to two differnt application. one sugesstion i got from Kakan is to develop a filter driver.

Now can a filter driver be used to install a virtual device.

there are MSVAD sample drivers in DDK. are thay filter drivers?
can i use those sample codes for my work.

saad

Editing long lines in VC++ 6.0

Ger Hayden12-Apr-06 9:22

Ger Hayden

12-Apr-06 9:22

Hi,
I have a line that I want to key as follows:

m_Query.Format("select Route_ID
Stage_ID,
Price,
valid_from,
valid_to,
Price_Key
from TicketPrice
where Ticket_Type = '%s'
FOR UPDATE", m_selected_id);

However I get C2001 newline in constant messages from the compiler. Anyone know the line continuation symbol?

Ger

Re: Editing long lines in VC++ 6.0

David Crow12-Apr-06 9:39

David Crow

12-Apr-06 9:39

Ger Hayden wrote:
Anyone know the line continuation symbol?

You can either use the backslash character like:

m_Query.Format("select Route_ID \
    Stage_ID, \
    Price, \
    valid_from, \
    valid_to, \
    Price_Key \
    from TicketPrice \
    where Ticket_Type = '%s' \
    FOR UPDATE", m_selected_id);

or enclose each string in quotes like:

m_Query.Format("select Route_ID "
               "Stage_ID, "
               "Price, "
               "valid_from, "
               "valid_to, "
               "Price_Key "
               "from TicketPrice "
               "where Ticket_Type = '%s' "
               "FOR UPDATE", m_selected_id);

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: Editing long lines in VC++ 6.0

Ger Hayden12-Apr-06 9:50

Ger Hayden

12-Apr-06 9:50

Thanks David,
Both forms work perfectly

GER

Ger

VC++ 6 project works in debug but not release

smikesmith12-Apr-06 8:56

smikesmith

12-Apr-06 8:56

I've built a fairly simple MFC project, dialog based, that talks to a USB GPS device. The program uses a second thread to receive data at a 1-second rate and display the information in text form. When a data packet is received, the worker thread sends a message to the DlgWindow to tell it to get the new information. The call is:

if (pThis->m_hWndPost)<br />
::PostMessage (pThis->m_hWndPost, pThis->m_nMessageID, 0, 0);<br />

This works correctly in the Debug version of the project. However, when the Release version is built, the second call to ::PostMessage() crashes. I've isolated that code, and if I don't call the message post, no problem (of course, the DlgWnd never gets the new data). If I trap the message at the responding function in the DlgWnd, it crashes.

One work-around: if I set the compiler options to build using the debug libraries, either stand-alone or with shared MFC DLL, the problem goes away. I can't find that I have any corrupted libraries (and no reason to suspect).

Has anyone ever seen this problem before? Any ideas what I'm doing wrong? Turning off optimizations has no effect, either.

Thanks,
Mike

Re: VC++ 6 project works in debug but not release

prasad_som12-Apr-06 19:21

prasad_som

12-Apr-06 19:21

In debug mode, compiler takes care of things like initialization.
Check if all variables used are properly initialized.
Use NULL check before using pointers.

This is just a try. I'm not sure , why crash is happening.

Please Help! What would cause Member Variable problem?

Charlie Curtis12-Apr-06 8:54

Charlie Curtis

12-Apr-06 8:54

Hi EveryOne!,

I will add code later, but I am having a problem with member variables. As you will see in the code the variables are being created and ClassWizard recognizes them. However, when I try to access them in the .CPP file they aren't working (I can add events from class wizard for them). I.E. I copy the variable from it's definition in the header file place it where I need it in the .CPP file and place a . (dot) after it, but it does not provide me a list of member functions that should be available. It does nothing. There is one exception and that is the m_CalUICCombo it works fine. The m_FySelected (also a ComboBox) does not work? Following is the Header file followed by the .cpp file. To keep this post down I've only inserted the relavant parts. Has anyone every run into this problem and if so what did you do to fix it?

Many Thanks in advance...
Charlie

// Header File Starts Here.<br />
class CECalAppendixIForm : public CFormView<br />
{<br />
protected:<br />
	CECalAppendixIForm();           // protected constructor used by dynamic creation<br />
	DECLARE_DYNCREATE(CECalAppendixIForm)<br />
<br />
// Form Data<br />
public:<br />
	//{{AFX_DATA(CECalAppendixIForm)<br />
	enum { IDD = IDD_APPENDIXI_FORM_VIEW };<br />
	CComboBox			m_FySelected;<br />
	CLabel				m_SelectedItemsLabel;<br />
	CLabel				m_AppendixILabel;<br />
	CComboBox			m_CalUICCombo;<br />
	//}}AFX_DATA<br />
<br />
// Attributes  <br />
public:<br />
	SYSTEMTIME ct;<br />
<br />
<br />
	CImgViewerDoc* GetDocument();<br />
	CString csHdrLine;<br />
// Operations<br />
public:<br />
<br />
// Overrides<br />
	// ClassWizard generated virtual function overrides<br />
	//{{AFX_VIRTUAL(CECalAppendixIForm)<br />
	public:<br />
	virtual void OnInitialUpdate();<br />
	protected:<br />
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support<br />
	virtual void OnDraw(CDC* pDC);<br />
	//}}AFX_VIRTUAL<br />
<br />
// Implementation<br />
protected:<br />
	virtual ~CECalAppendixIForm();<br />
#ifdef _DEBUG<br />
	virtual void AssertValid() const;<br />
	virtual void Dump(CDumpContext& dc) const;<br />
#endif<br />
<br />
	// Generated message map functions<br />
	//{{AFX_MSG(CECalAppendixIForm)<br />
	afx_msg void OnCloseupCalUIC();<br />
	afx_msg void OnCloseupFySelected();<br />
	//}}AFX_MSG<br />
	DECLARE_MESSAGE_MAP()<br />
};<br />
<br />
// Source file Starts Here.<br />
<br />
IMPLEMENT_DYNCREATE(CECalAppendixIForm, CFormView)<br />
<br />
CECalAppendixIForm::CECalAppendixIForm()<br />
	: CFormView(CECalAppendixIForm::IDD)<br />
{<br />
	//{{AFX_DATA_INIT(CECalAppendixIForm)<br />
	//}}AFX_DATA_INIT<br />
}<br />
<br />
CECalAppendixIForm::~CECalAppendixIForm()<br />
{<br />
}<br />
<br />
void CECalAppendixIForm::DoDataExchange(CDataExchange* pDX)<br />
{<br />
	CFormView::DoDataExchange(pDX);<br />
	//{{AFX_DATA_MAP(CECalAppendixIForm)<br />
	DDX_Control(pDX, IDC_FYSELECTED, m_FySelected);<br />
	DDX_Control(pDX, IDC_SELECTITEMS, m_SelectedItemsLabel);<br />
	DDX_Control(pDX, IDC_APPENDIXI, m_AppendixILabel);<br />
	DDX_Control(pDX, IDC_CALUICOMBO, m_CalUICCombo);<br />
	//}}AFX_DATA_MAP<br />
}<br />
<br />
<br />
BEGIN_MESSAGE_MAP(CECalAppendixIForm, CFormView)<br />
	//{{AFX_MSG_MAP(CECalAppendixIForm)<br />
	ON_CBN_CLOSEUP(IDC_CALUICOMBO, OnCloseupCalUIC)<br />
	ON_CBN_CLOSEUP(IDC_FYSELECTED, OnCloseupFySelected)<br />
	//}}AFX_MSG_MAP<br />
END_MESSAGE_MAP()<br />
<br />
#ifdef _DEBUG<br />
void CECalAppendixIForm::AssertValid() const<br />
{<br />
	CFormView::AssertValid();<br />
}<br />
<br />
void CECalAppendixIForm::Dump(CDumpContext& dc) const<br />
{<br />
	CFormView::Dump(dc);<br />
}<br />
#endif //_DEBUG<br />
<br />
CImgViewerDoc* CECalAppendixIForm::GetDocument() // non-debug version is inline<br />
{<br />
	//ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CECalTrackingDoc)));<br />
	m_pDocument->IsKindOf(RUNTIME_CLASS(CImgViewerDoc));<br />
	return (CImgViewerDoc*)m_pDocument;<br />
}<br />
/////////////////////////////////////////////////////////////////////////////<br />
// CECalAppendixIForm message handlers<br />
<br />
void CECalAppendixIForm::OnDraw(CDC* pDC) <br />
{<br />
	SetScrollSizes(MM_TEXT, CSize(1200,1200)); // Larger than the Frame so the VScroll Bar is shown.<br />
	CImgViewerDoc* pDoc = GetDocument();<br />
	pDoc->csHdrLine = "APPENDIX I";<br />
	pDoc->UpdateAllViews(this);<br />
}<br />
<br />
void CECalAppendixIForm::OnCloseupCalUIC() <br />
{<br />
}<br />
<br />
void CECalAppendixIForm::OnInitialUpdate() <br />
{<br />
	CFormView::OnInitialUpdate();<br />
	<br />
	CSize sizeTotal;<br />
<br />
	// These sizes insure that when the OnDraw Function is called with larger values<br />
	// The VScrollBar will be drawn.<br />
	sizeTotal.cx = 250;<br />
	sizeTotal.cy = 100;<br />
	SetScrollSizes(MM_TEXT, sizeTotal);<br />
<br />
	m_SelectedItemsLabel.SetWindowText("There are No Input Item(s) required for this Appendix.");<br />
	m_AppendixILabel.SetTextColor(RGB(0,100,130));<br />
	m_AppendixILabel.SetFontName("Times New Roman");<br />
	m_AppendixILabel.SetFontSize(14);<br />
	m_AppendixILabel.SetFontBold(FALSE);<br />
	m_AppendixILabel.SetFontUnderline(FALSE);<br />
	m_AppendixILabel.ShowWindow(SW_SHOW);<br />
}<br />
<br />
void CECalAppendixIForm::OnCloseupFySelected() <br />
{<br />
	// TODO: Add your control notification handler code here<br />
	<br />
}

Everything is Free... Until You Have to Pay for it...

Platforms Windows 2000/XP Professional using Visual C++ 6.0

Re: Please Help! What would cause Member Variable problem?

David Crow12-Apr-06 9:10

David Crow

12-Apr-06 9:10

Without having to wade through all of the code, are you having trouble with IntelliSense?

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: Please Help! What would cause Member Variable problem?

Charlie Curtis12-Apr-06 9:26

Charlie Curtis

12-Apr-06 9:26

Let me see if I can make the problem a little more clear. When I go to my OnDraw function in the source file and put in m_CalUICCombo. I get a scrollable list box of the functions/variables I can access for that combobox. When I type m_FySelected. I do not receive the scrollable list box giving me those choices for that combobox. I hope this will make it a little more clear what I am having a problem with. So I am not sure if that would be a problem with intellisense? Any further advice would be appreciated.

Everything is Free... Until You Have to Pay for it...

Platforms Windows 2000/XP Professional using Visual C++ 6.0

Re: Please Help! What would cause Member Variable problem?

David Crow12-Apr-06 9:34

David Crow

12-Apr-06 9:34

Charlie Curtis wrote:
So I am not sure if that would be a problem with intellisense?

It is. See if this helps.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: Please Help! What would cause Member Variable problem?

Charlie Curtis12-Apr-06 10:10

Charlie Curtis

12-Apr-06 10:10

Appreciate your time and effort. I followed the link and found the information very useful for future reference. however, for the problem I had today it turns out that my .ncb, .aps, and .clw files got corrupted. I deleted them and reopened my project rebuilt the class wizard and all is well. Thanks again for the info.
Charlie

Everything is Free... Until You Have to Pay for it...

Platforms Windows 2000/XP Professional using Visual C++ 6.0

Re: Please Help! What would cause Member Variable problem?

David Crow12-Apr-06 10:17

David Crow

12-Apr-06 10:17

Charlie Curtis wrote:
...my .ncb, .aps, and .clw files got corrupted. I deleted them and reopened my project rebuilt the class wizard and all is well.

Yes, that is a common problem, too.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Problem when Change number of arguments of MFC activeX control's exposed method

Michael Tang12-Apr-06 8:48

Michael Tang

12-Apr-06 8:48

Please forgive my bad English first.

I changed the number of arguments of one of exposed methods of an old MFC activeX control. Then I just can't call it any more either in VB or ActiveX Control Test Container.

Here are the steps:
1).
I built a MFC activeX control with one of its exposed functions requiring 1 arguments. I registered the control and built a test VB application and it was OK.

2).
Then I changed that function to having 2 arguments and built the control again. And I also registered it again.

3).
The I changed calling code in the test VB application accordingly. But it just failed to call the function by remind me "Invalid number of arguments".

Any help will be greatly appreciated!

Re: Problem when Change number of arguments of MFC activeX control's exposed method

Michael Tang12-Apr-06 9:42

Michael Tang

12-Apr-06 9:42

I think I found an IMPORTANT message. It's a warning when I compile the new MFC control in VC 6.0:

: warning C4002: too many actual parameters for macro 'DISP_FUNCTION'

I think this the very reason of the problem. But I have manually changed the method declarations in all the places.

Why is there this compiling WARNING?

Re: Problem when Change number of arguments of MFC activeX control's exposed method

prasad_som12-Apr-06 19:41

prasad_som

12-Apr-06 19:41

Michael Tang wrote:
: warning C4002: too many actual parameters for macro 'DISP_FUNCTION'

It says you have added one additional parameter in macro defn.
Make your macro defn look like one following

DISP_FUNCTION(mycorntrolclass, "MyMethod", MyMethod, VT_EMPTY/*return type*/, VTS_PI4 VTS_PI4/* nos of params should be space separated, dont use comma inbetn*/)

make sure you activex builds without any warning.
Add its reference to your client program again.

Re: Problem when Change number of arguments of MFC activeX control's exposed method

Michael Tang13-Apr-06 4:05

Michael Tang

13-Apr-06 4:05

prasad_som, A thousand thanks to you!
You just hit it, Now it's solved by killing the redundant comma.
I had checked the macro difinition I changed for so many times, but I just omitted the comma. Smile | :)

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