F%$#*&@ GDI Rectangles - C / C++ / MFC Discussion Boards

dmanjake28-Apr-05 18:02

28-Apr-05 18:02

Does anyone know a way to determine the launching process of another process that has no parent? ie. was started with system function or cmd /c start
Any help would be greatly appreciated!

Re: How to find launching process

ThatsAlok28-Apr-05 20:23

ThatsAlok

28-Apr-05 20:23

you have to hook CreateProcess for that

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Re: How to find launching process

dmanjake29-Apr-05 4:37

dmanjake

29-Apr-05 4:37

can you be more specific. i am trying to write a program that will retrace respawning spyware back to launching process. the respawned processes have no parent, so how to determine which process launched it.

Re: How to find launching process

ThatsAlok29-Apr-05 19:58

ThatsAlok

29-Apr-05 19:58

Have a look at this article

http://codeproject.com/system/Paladin.asp[^]

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Re: How to find launching process

dmanjake30-Apr-05 3:47

dmanjake

30-Apr-05 3:47

Thanks Alok! looks like some stuff in there I may be able to use. I am vb/vfp programmer in over his head a little with c++ code, but I am feeling my way through it. Sometimes just need a point in right direction! thanks again
dman

Do you know this warning?

kiluar28-Apr-05 16:56

kiluar

28-Apr-05 16:56

warning C4786: '__ehhandler$?ExecSQL@CDBHandle@@QAE?AV?$_com_ptr_t@V?$_com_IIID@U_Recordset@@$1?_GUID_00000556_0000_0010_8000_00aa006d2ea4@@3U__s_GUID@@A@@@@V?$_com_ptr_t@V?$_com_IIID@U_Conne
ction@@$1?_GUID_00000550_0000_0010_8000_00aa006d2ea4@@3U__s_GUID@@A@@@@VCString@@@Z' : identifier was truncated to '255' characters in the debug information

what do this warning is talking about?
thanks for any help! Confused | :confused:

Re: Do you know this warning?

David Crow29-Apr-05 2:46

David Crow

29-Apr-05 2:46

See here.

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

F%$#*&@ GDI Rectangles

Blake Miller28-Apr-05 13:35

Blake Miller

28-Apr-05 13:35

Is there a Microsoft 'bug' number for the fact that the GDI rectangles functions stop one short of drawing all the way to the right and bottom coordinates?

For example, if the pen width is one, a Rectangle(0, 0, 16, 16) call will only draw to (0,0)-(15,15) Mad | :mad:

The Windows GDI function calls involving filled rectangles will draw one pixel short on the right edge and the bottom edge of the specified rectangle. This is documented in MSDN for Rectangle and FillRect, but no mention is made for RoundRect, FrameRect, and InvertRect (even though they also exhibit this behavior).
This is a problem for us because we are trying to represent the locations of our objects using ‘logical’ coordinates and ‘logical extents’ (Visual extent of object rather than logical ‘GDI’ location). We are trying to avoid storing the boundaries of objects in terms of ‘screen coordinates’ so that we might better server our customers with panning, zooming, and device resolution independence.

I had also been told this was 'fixed' in GDI+, or can I just assume that GDI+ 'broke' the existing 'functionality' D'Oh! | :doh:

Re: F%$#*&@ GDI Rectangles

LunaticFringe28-Apr-05 13:59

LunaticFringe

28-Apr-05 13:59

Nice rant. Never mind that it made you look look an idiot...

See, when the documentation specifically states that a function works in a particular way, and then it works that way, it's generally not considered to be a bug. For example, here's the doc comment on FillRect.

The FillRect function fills a rectangle by using the specified brush. This function includes the left and top borders, but excludes the right and bottom borders of the rectangle.

So you're bitching because it does what it says it will do? Or did you even bother to read the docs?

Re: F%$#*&@ GDI Rectangles

Blake Miller28-Apr-05 14:27

Blake Miller

28-Apr-05 14:27

I am quoting myself here:
This is documented in MSDN for Rectangle and FillRect, but no mention is made for RoundRect, FrameRect, and InvertRect (even though they also exhibit this behavior).

I did read the docs. Read the docs for InvertRect. You would be inclined to think it inverted the ENTIRE rectangle, but it does not. Same for RoundRect and FrameRect. No mention of excluding the edges of the rectangles there. I might have to install my April 1994 MSDN to see if Microsoft mentioned it there or not. That is how old the program I am trying to maintain is.

If you are making a graphics application that is very interested in the visual extent of a rectangle, and you have the logical coordinates for it, it causes a lot of tweaks to be required, one place or the other.

Re: F%$#*&@ GDI Rectangles

Michael Dunn28-Apr-05 14:17

Michael Dunn

28-Apr-05 14:17

Why are RECTs endpoint-exclusive?[^]

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

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Re: F%$#*&@ GDI Rectangles

Blake Miller29-Apr-05 4:14

Blake Miller

29-Apr-05 4:14

Thanks for the great link. I can see that EndPoint-Exclusive is beneficialif you want your rectangles to border each other. We want ours to be able to visually overlap one pixel.

how could I modify window registry

Carlos R.28-Apr-05 12:38

Carlos R.

28-Apr-05 12:38

I've done some works in C# using the Registry class in Microsoft.Win32 namespace, but now, I can't use the frameWork at the client. I would like to deliver this work fast. ... can you help me ??

Re: how could I modify window registry

PJ Arends28-Apr-05 13:12

PJ Arends

28-Apr-05 13:12

MSDN[^] is your friend.

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

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Within you lies the power for good - Use it!

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Re: how could I modify window registry

Alexander ^M.,29-Apr-05 9:15

Alexander ^M.,

29-Apr-05 9:15

This is the Visual C++ forum! For C# questions please use the C# forum, thx!

Don't try it, just do it! Wink | ;-)

CCmdTarget Destructor NON-MANAGED code

clazarowitz28-Apr-05 12:31

clazarowitz

28-Apr-05 12:31

I have a problem in a multi-dll project. Everything works except for an access violation in the CCmdTarget Destructor. Its a CEdit Control I'm actually not using. Now heres where the fun starts, remove the CEdit, and the Spin control in the same dialog now asserts setting the range, claiming it is not a window. Want some more fun? Remove the Spin Control from the dialog class, and now operator new breaks during heap alloc doing a heap check, which then fails no matter how many times you continue (big surprise (end sarcasm)). I had thought maybe it was my use of the MS STL not being DLL safe, so I grabbed stlport, and have the exact same results. I'm not doing anything odd in this code, which is why I did not post it. Instead, I suspect I have done something really dumb somewhere else and have just overlooked it, and am hoping someone here may have done the same dumb thing, or know someone who has, and knows what I have done wrong.

Other steps I have taken: Resource ID confilcts resolved. Making the property pages not be global variables, but instead be on the heap.

The behavior has not changed from the original problem.

Additional Info: m_xDispatch.m_vtbl=2696277389 m_dwRef=1051772663 in the CCmdTarget Destructor, it bails on the line ((COleDispatchImpl*)&m_xDispatch)->Disconnect();

Thanks in advance
Corry

Docking external application into my application

the Jimmy28-Apr-05 12:26

the Jimmy

28-Apr-05 12:26

Hi,
I really need your help. Here is my problem:
I have my application which has the main window. Inside my application, I start another external application and now I like to dock/import the window of the external application into my application main window. PLease show me how to do that.

Thanks
Jimmy

Posting messages

Tom Wright28-Apr-05 11:29

Tom Wright

28-Apr-05 11:29

I've written two seperate dialog based applications. Now I want one of them to send a message to the other, telling it it's status. I've tried postmessage, but it does no seem to pass my CString pointer. In my message event there is nothing in the lparam. I've set it up like naughter suggests but I'm wondering if I'm doing something wrong.

Some questions: In order to sendmessages between two different apps, do I need to register my message?

Can you not send a pointer between two different apps? I've done this using threads between my main app and the threads.

Thanks
Tom

Tom Wright
tawright915@yahoo.com

Re: Posting messages

Ravi Bhavnani28-Apr-05 11:35

Ravi Bhavnani

28-Apr-05 11:35

See WM_COPYDATA.

/ravi

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Re: Posting messages

Tom Wright28-Apr-05 11:41

Tom Wright

28-Apr-05 11:41

you think? Hum..I give it a try. Thanks
Tom

Tom Wright
tawright915@yahoo.com

Re: Posting messages

Michael Dunn28-Apr-05 14:21

Michael Dunn

28-Apr-05 14:21

Tom Wright wrote:
Can you not send a pointer between two different apps?

Short answer: no. Each process has its own process space, memory from one is not visible in others, and addresses in one are meaningless in others. You need to use an IPC mechanism, WM_COPYDATA will probably be easiest since you're already using message to communicate.

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

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Re: Posting messages

Tom Wright29-Apr-05 4:33

Tom Wright

29-Apr-05 4:33

I'm trying to pass a struct with the WM_COPYDATA. How would I receive this on the receving side of my app. Currently this is how I'm doing it right now:

ConnStatus *cConnStatus;
//CString strRecievedText = (LPCSTR) (pCopyDataStruct->lpData);
memcpy(cConnStatus, pCopyDataStruct->lpData, pCopyDataStruct->cbData);
AfxMessageBox(cConnStatus->cID);

I get an assert error, and I think it's because I'm trying to pass lpdata to a pointer to my struct.

Do you have any suggestions on how to do this?

Thanks

Tom Wright
tawright915@yahoo.com

Re: Posting messages

Michael Dunn29-Apr-05 6:28

Michael Dunn

29-Apr-05 6:28

To send just a string, do this in the sending side:

COPYDATASTRUCT cds = {0};
CString sTheData = _T("foobar");
cds.lpData = (LPCTSTR) sTheData;
cds.cbData = (sTheData.Length()+1)*sizeof(TCHAR);

In the receiving side:

BOOL CAppWindow::OnCopyData ( HWND hwndSrc, COPYDATASTRUCT* pcds )
{
CString s = (LPCTSTR) pcds->lpData;
}

If you have a whole struct, you need to get all the data into one contiguous buffer so the system can copy it into shared memory for the target process to use.

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

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Strange things are afoot at the U+004B U+20DD

defining global variables

Oriented28-Apr-05 9:12

Oriented

28-Apr-05 9:12

i'm using VC++6;
i want to declare a global variable(i.e., to be seen in all the classes of the app)
i tried to declare it n CMyApp ( : public CWinApp) but an error message (undeclared identifier) usually appears..
regards.
keep the matter as simple as it can be !!

Re: defining global variables

Maximilien28-Apr-05 9:42

Maximilien

28-Apr-05 9:42

what errror ? and where does the error appears ?

you need to #include your app class .h file in the files you will access CMyApp

Maximilien Lincourt
Your Head A Splode - Strong Bad

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