C / C++ / MFC Discussion Boards

Re: Cannot Interact with service using SERVICE_USER_DEFINED_CONTROL[SOLVED]

vishalgpt13-Aug-11 16:04

13-Aug-11 16:04

Richard MacCutchan wrote:
Add some breakpoints in the LaunchAppIntoDifferentSession() function in order to find out what is happening.

Thank you sir, Everything now works like a charm...... Love you sir, and love u codeproject....
Thumbs Up | :thumbsup:

Regards,
Vishal

Bitmap on Picture Control

manju 312-Aug-11 21:18

manju 3

12-Aug-11 21:18

Hi all,
I am taking a picture control on the dialog.In Properties I am taking a Bitmap Image on the dialog.
I am planning to drag and drop the bitmap image to other location.But i am not able to.
I am able to get the MouseMovements(x axis,y axis),where in ,i am changing the cursor when the mouse is on the
bitmap image as shown in below function.
Please find the below code,which i am trying.
Please let me know what to do

void CLoadImageDlg::OnMouseMove(UINT nFlags, CPoint point)
{
	// TODO: Add your message handler code here and/or call default
	HWND hwnd;
	CString str_mousemove;
	POINT p;		
	long int xp,yp,i;
	int lParam;
	i=3;
	GetCursorPos(&p);
	xp=p.x;
	yp=p.y;
	str_mousemove.Format(_T("x = %d,y=%d"),xp,yp);	
	CPoint ptHotSpot(500,600); 
	if((xp>507 && xp <696) && (yp>460 && yp<569))
	{
		SetCapture();
		m_bCaptured=TRUE;
		CPoint pointTopLeft(507);		
		m_sizeOffset = point - pointTopLeft;
		::SetCursor(::LoadCursor(NULL, IDC_HAND));		
	}
	if((xp<507 ||xp >696) || (yp<460 || yp>569))
	{		
		ReleaseCapture();			
	}
	
	CDialog::OnMouseMove(nFlags, point);
}
void CLoadImageDlg::OnLButtonDown(UINT nFlags, CPoint point)
{
	// TODO: Add your message handler code here and/or call default  
	CString str_mousemove1;	
	POINT p;
	CDC dcMem; //current device context	
	int xp,yp;
	GetCursorPos(&p);
	xp=p.x;
	yp=p.y;
	str_mousemove1.Format(_T("x = %d,y=%d"),xp,yp);	
	if((xp>507 && xp <696) && (yp>460 && yp<569))
	{
		SetCapture();
		m_bCaptured=TRUE;
		CPoint pointTopLeft(507);	
		m_sizeOffset = point - pointTopLeft;
		::SetCursor(::LoadCursor(NULL, IDC_HAND));
		
	}

	CDialog::OnLButtonDown(nFlags, point);
}

Can anyone please help me,how can i drag the image and drop to other location in the same dialog

Thanks in Advance

Thanks
Sharan

Re: Bitmap on Picture Control

Richard MacCutchan13-Aug-11 0:43

Richard MacCutchan

13-Aug-11 0:43

At a guess you need to implement drag and drop code for your image. Take a look at some of these links[^] for suggestions.

Unrequited desire is character building. OriginalGriff

Re-intilize stack pointer

ForNow12-Aug-11 9:41

ForNow

12-Aug-11 9:41

Hi

I have the following code in a DLL
{
char buffer[30].

WaitForSingleObject

strcpy(command,buffer[0])

when the object gets signaled I get a access exception
because buffer which is a local variable
is refrenced by the stack pointer

any suggestion would be helpfull

thanks

Re: Re-intilize stack pointer

MicroVirus12-Aug-11 10:42

MicroVirus

12-Aug-11 10:42

I'm surprised it even compiled. What you are writing is copying the string to command from the address specified by buffer[0].
strcpy(command, buffer) is probably what you wanted to write.

If that's not the problem, please give the whole code, and use code blocks to properly preserve the format

Re: Re-intilize stack pointer

Richard MacCutchan12-Aug-11 23:00

Richard MacCutchan

12-Aug-11 23:00

What is command and where have you initialized buffer? Also, on the basis that the above code will not even compile, it is little wonder you are having problems. In future use copy and past to put your code into a question and use the "code block" button to ensure it's formatted properly.

Unrequited desire is character building. OriginalGriff

About wWinMainCRTStartup. Can anybody tell me what it exactly is? How does it work?

frankgt4012-Aug-11 7:31

frankgt40

12-Aug-11 7:31

When I ask what it exactly is, there are always someone told me that the wWinMainCRTStartup is the real entrance of the windows programs. And when you code with UNICODE you should set it with VC++.

I found that this wWinMainCRTStartup function was called before the global object of 'CxxxApp' being constructed. It's called before the programs running.

Can anybody tell what it exactly is? Is it involved with OS or compiler? Where does the Windows programs actually start and how? Or, are there any good books or references to be read for that?

Thanks a lot!

Re: About wWinMainCRTStartup. Can anybody tell me what it exactly is? How does it work?

Maximilien12-Aug-11 8:01

Maximilien

12-Aug-11 8:01

The best book to lean what is going on in an MFC application is/was "MFC Internals[^]"

have a look at this (and other related google searches) :http://msdn.microsoft.com/en-us/library/ff381406(v=vs.85).aspx[^]

(or http://msdn.microsoft.com/en-us/library/f9t8842e.aspx[^] )

(or Win32 vs. MFC - Part I[^] )

Watched code never compiles.

Re: About wWinMainCRTStartup. Can anybody tell me what it exactly is? How does it work?

frankgt4012-Aug-11 16:56

frankgt40

12-Aug-11 16:56

Tanks for answering. I'm now reading the MFC internals. I want to know the principle MFC works on.

Re: About wWinMainCRTStartup. Can anybody tell me what it exactly is? How does it work?

MicroVirus12-Aug-11 8:25

MicroVirus

12-Aug-11 8:25

Every windows application needs an entry point, to start execution. It's the first thing that gets run when windows starts a new process. This is wWinMainCRTStartup and not 'main', which is the first point of user code run, is because the C-runtime library needs to initialise before user code can be run.
If you just want a barebone executable without CRT support then you could set it to your own function via the compiler.

Re: About wWinMainCRTStartup. Can anybody tell me what it exactly is? How does it work?

frankgt4013-Aug-11 5:17

frankgt40

13-Aug-11 5:17

I already know that. And I just want more materials. This is the word describing. How can I get the concrete principles and explanations of the related Library sources. I searched the item on MSDN website but there is little materials of that subject.

Re: About wWinMainCRTStartup. Can anybody tell me what it exactly is? How does it work?

Emilio Garavaglia13-Aug-11 5:07

Emilio Garavaglia

13-Aug-11 5:07

It is the "initializer" and "cleaner" of the C-RunTine.
The operating system calls it with a machine code jump after loading the executable in memory and filled up the relocation table.
It takes care of the invocation of the constructors of all the global objects (since the exist "outside of main", they have to be create before main is called). It then invokes "main" (or WinMain) after unpacking the command line, and - when main returns, calls the destructor of the on-fly created static objects and the destructors of the global objects in reverse construction order, then finally, returns the main return value to the OS process who invoked the app.

2 bugs found.
> recompile ...
65534 bugs found.
D'Oh! | :doh:

Re: About wWinMainCRTStartup. Can anybody tell me what it exactly is? How does it work?

frankgt4013-Aug-11 5:26

frankgt40

13-Aug-11 5:26

You are right. I've followed the source code in crtexe.c and watched the program's executing sequences. And can you tell me why the OS must do this? Is it because of the relocating? Thanks!

Re: About wWinMainCRTStartup. Can anybody tell me what it exactly is? How does it work? [modified]

Emilio Garavaglia13-Aug-11 9:46

Emilio Garavaglia

13-Aug-11 9:46

The reason is not because of the OS (it simply adjust the relocation table after copying the executable image in memory BEFORE jumping in it, so the exe itself has no role in that) but because of how C++ works.

Objects has constructors and destructors.
Try this

C++

#include <iostream>

class A
{
public:
    A() { std::cout << "A created" << std::endl; }
    ~A() { std::cout << "A destroyed" << std::endl; }
};

A global_a;

int main()
{
    std::cout << "this is main" << std::endl;
    return 0;
}

The output will be

txt

A created
this is main
A destroyed

Global objects must be created/destroyed outside the scope of main.
This is not an OS requirement, but a requirement for the C++ specification.
mainCRTSturtup is the "bridge" between the OS (that has no clue about the app language specifications: it just want an address to be called) and a language like C++ that requires some code (constructors and destructors of global objects) to be executed independently of the main() function.

2 bugs found.
> recompile ...
65534 bugs found.
D'Oh! | :doh:

modified on Sunday, August 14, 2011 4:33 AM

Insert new row in Excel using MFC VC++

spalanivel11-Aug-11 23:58

spalanivel

11-Aug-11 23:58

Hi,
I am using a VC++ MFC app to drive Excel through OLE Automation.

I need to insert new row in the Excel.

How to acheive this?
***************
// Code Sample
***************

// excel application object
Application objExcel;

// local var
COleVariant vRet;

// range object
Range objRange;

// set the workbooks object
Workbooks objWorkbooks( V_DISPATCH( (LPVARIANT)vRet ) );

// adding the new workbook
vRet = objWorkbooks.Add( COleVariant( (long)xlWorksheet ) );

// set the workbook object
Workbook objWorkbook( V_DISPATCH( (LPVARIANT)vRet ) );

// adding the worksheet
vRet = objWorkbook.Worksheets( COleVariant( (long)1 ) );

Worksheet objWorksheet( V_DISPATCH( (LPVARIANT)vRet ) );

// get the range

vRet = objWorksheet.Range1( COleVariant( csRange ) );
objRange.AttachDispatch( V_DISPATCH( (LPVARIANT)vRet ) );

From the above code in objRange having the Row position as C8.

Here need to insert a new row.

Reg,
SPala

Re: Insert new row in Excel using MFC VC++

David Crow12-Aug-11 4:14

David Crow

12-Aug-11 4:14

Have you tried objRange.Insert()?

"One man's wage rise is another man's price increase." - Harold Wilson

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

"Some people are making such thorough preparation for rainy days that they aren't enjoying today's sunshine." - William Feather

Re: Insert new row in Excel using MFC VC++

spalanivel15-Aug-11 2:09

spalanivel

15-Aug-11 2:09

Hi David,

Thanks for your reply. I am using Excel 2007.

Yes i tried with Insert method. I don't how to give the Parameter value;

Below is my code:

csRange.Format("C%d", nRow );
       // get the range
    vRet = objWorksheet.Range1( COleVariant( csRange ) );
    objRange.AttachDispatch( V_DISPATCH( (LPVARIANT)vRet ) );

objRange.Insert(???)

**********************************
synatx for Insert:
objRange.Insert(const VARIANT &shift)

**************************************

How to give the parameter value for Insert method?

Waiting for your reply.

Thanks,
SPala

Re: Insert new row in Excel using MFC VC++

David Crow15-Aug-11 3:31

David Crow

15-Aug-11 3:31

spalanivel wrote:
How to give the parameter value for Insert method?

Have you tried something like:

objRange.Insert(COleVariant(-4121L), vtOptional);

Re: Insert new row in Excel using MFC VC++

spalanivel15-Aug-11 19:47

spalanivel

15-Aug-11 19:47

I tried with the below codes but still no luck...

csRange.Format("C%d", nRow );
objWorksheet.Range( COleVariant(csRange), vtOptional);

and

objRange.Insert(COleVariant(-4121L), vtOptional);

Following Error Message while i tried with the above code "Memeber Not Found"..

Any other option?

Just need to insert a new row i am using Excel 2007 and excel9.h header file.

Thanks.

Re: Insert new row in Excel using MFC VC++

David Crow16-Aug-11 3:40

David Crow

16-Aug-11 3:40

spalanivel wrote:

Following Error Message while i tried with the above code "Memeber Not Found"..

What member is the compiler referring to?

Hiding DialogBar of Mainframe [Solved]

Anu_Bala11-Aug-11 20:43

Anu_Bala

11-Aug-11 20:43

HI,

In my application im having one Dialogbar contains Listbox and editbox and i attached this DialogBar to Mainframe.

But i want to display this DialogBar only when some childviews are active.Otherwise this DialgoBar should be in hiding.TO get this in OnTImer() of Mainframe class.I did this..

void CMainFrame::OnTimer(UINT_PTR nIDEvent)
{
        CMDIFrameWnd *pMainWnd = (CMDIFrameWnd*)AfxGetApp()->m_pMainWnd ;
        CMDIChildWnd *fChWnd = (CMDIChildWnd*)pMainWnd->GetActiveFrame();
        CView *pView = (CView*)fChWnd->GetActiveView ();

        if(NULL != pView)
        {
         if(pView->IsKindOf(RUNTIME_CLASS(CGraphView)))
             m_RecentAlarms.ShowWindow(SW_SHOW);
         else
             m_RecentAlarms.ShowWindow(SW_HIDE);
        }
        m_RecentAlarms.Invalidate();
    CMDIFrameWnd::OnTimer(nIDEvent);
}

m_RecentAlarms is DialogBar.
It works for one time only.First when i go to CTuningView(I dont want dialogbar),the dialogbar gets hided.When i go to CGraphView,it shows.
But when again go to tuning view its not get hided.When i debug,the cursor goes to OnTimer() and it goes to SW_HIDE also..but even its showing here.
Pls help me in this issue.

Anu

modified on Friday, August 12, 2011 5:28 AM

Re: Hiding DialogBar of Mainframe

వేంకటనారాయణ(venkatmakam)11-Aug-11 21:23

వేంకటనారాయణ(venkatmakam)

11-Aug-11 21:23