C / C++ / MFC

error LNK2001 with static and global data in a Win32 C++ Dll

24-Mar-04 15:16

If your DLL api's input is a BSTR then the code in delphi has to pass the parameters in BSTR.
otherwize it will simple not work. Smile | :)

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prakashnadar@msn.com

Tip of the day of visual C++ IDE.
"We use it before you do! Visual C++ was developed using Visual C++"

Hashim Saleem24-Mar-04 10:49

Hashim Saleem

24-Mar-04 10:49

I am facing a head scratching problem in building a Win32 Dll. I have some C++ classes in the Dll and I want to access these classes in a C++ client. These classes contain some static data and also Dll has some global data. I have successfully build the DLL, but when I use this DLL in client, I get Linker error "LNK2001: unresolved external symbol" for static as well as global data.

I viewed the exports of dll with dumpbin utility and dumpbin shows this data exported but linker is not finding it in the dll. I read somewhere that there is a SECTION statement in .DEF file which deals with the defualt scope of global and static data in a DLL. Can this be used to rectify this problem and if yes then how? As a note, I am not using .DEF file to build the dll, I am using __declspec(dllexport) keyword to export classes and global data from dll.

Please help me, I am scratching my head at the moment.

Re: error LNK2001 with static and global data in a Win32 C++ Dll

BlackDice24-Mar-04 10:55

Re: error LNK2001 with static and global data in a Win32 C++ Dll

24-Mar-04 10:55

You sound like you're a lot smarter than me, so please forgive me if I sound stupid. But I was just wondering if you're actually #include-ing the header file and linking to the .lib file. Or don't you have to do this? Please don't think I'm being sarcastic, but I've just gone through a DLL hell of my own and I'm still kinda new, so I'd also like to know the answer;)

If it's broken, I probably did it

bdiamond

Hashim Saleem24-Mar-04 11:02

Hashim Saleem

24-Mar-04 11:02

yes, I m including the header file and also linking with .lib file but ........................... Mad | :mad:

Re: error LNK2001 with static and global data in a Win32 C++ Dll

BlackDice24-Mar-04 11:18

Invoking Outlook Exp. from VC++ Application.

24-Mar-04 11:18

sorry, that's about the extent of my knowledge. Wish I could've been more help Cry | :((

If it's broken, I probably did it

bdiamond

Pankaj Bhalla24-Mar-04 10:46

Pankaj Bhalla

24-Mar-04 10:46

Hi there.

I am facing an issue. I am not able to invoke MS Outlook Exp. from my VC++ application. What I need is, when I click on a button, Outlook exp. should came up with an E-Mail address that we are getting from our own database.

Thanks and Regards,

Pankaj Bhalla
pankajbhalla@mantraonline.com

large font vs. small font woes ...

Maximilien24-Mar-04 10:15

Maximilien

24-Mar-04 10:15

what do I have to search for to be able to fix large font/small fonts problems ?

The problem is that the dialog size is fixed ( which is not supposed to be, I think ) so now, in large font, some controls overlap; and I need to resize.

Is MapDialogRect the way to go ?

Is there a way to debug large font/small font without having 2 computers or need to restart each time I change the setting ?

Thanks.

Maximilien Lincourt
Your Head A Splode - Strong Bad

Re: large font vs. small font woes ...

Todd Smith25-Mar-04 13:28

Todd Smith

25-Mar-04 13:28

If you do your work in Large Font mode things will work out.

Todd Smith

doc/view app with treeview on the left, how?

lordgreg24-Mar-04 9:57

lordgreg

24-Mar-04 9:57

i created new mfc application with multi doc/view. now, i would like to have also treeview in the main dialog. i would put it on the left of it. how to do that?

any ideas?

Prakash Nadar24-Mar-04 15:13

24-Mar-04 15:13

I dont have the exact idea... what all changes are to be made, but just for a help you can construct a new doc/view project with splitter window and checkout the OnCreate event of the frame thats where the splitters are created.

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prakashnadar@msn.com

Tip of the day of visual C++ IDE.
"We use it before you do! Visual C++ was developed using Visual C++"

axid3j1al24-Mar-04 19:24

axid3j1al

24-Mar-04 19:24

Option 1

Follow the excellent instructions from "Paul R Thompson"

Pauls Splitter Gear

Download and copy

MFC SplitterWnd Sample

Option 2

Copy this.

[1] Create new project (sdi)

Add this to MainFrm.h

CSplitterWnd split;
BOOL m_bInitSplit;

Initialise m_bInitSplit to FALSE in MainFrm.h constructor.

Override OnCreateClient in CMainFrame (alt+enter in VC 6.0 mode or ctrl-alt-x-click in BS .NET mode)

Add this

CRect cr;
GetClientRect( &cr);

if ( !split.CreateStatic( this,1,2) )
{
MessageBox( "Error setting up splitter frames!",
"Init Error!", MB_OK | MB_ICONERROR );
return FALSE;
}

/* Note CTreeStuff is not defined yet. See later */

if ( !split.CreateView( 0, 0,
RUNTIME_CLASS(CTreeStuff),
CSize(200,50), pContext ) )
{
MessageBox( "Error setting up splitter frames!",
"Init Error!", MB_OK | MB_ICONERROR );
return FALSE;
}

/* you will have to change this to your RUNTIME_CLAS CView derived class */
if ( !split.CreateView( 0, 1,
RUNTIME_CLASS(CtmpView),
CSize(cr.Width(),cr.Height()), pContext ) )
{
MessageBox( "Error setting up splitter frames!",
"Init Error!", MB_OK | MB_ICONERROR );
return FALSE;
}

m_bInitSplit = TRUE;

ensure that you replace

return CFrameWnd::OnCreateClient(lpcs, pContext);

with this

return TRUE;

Add a MFC class CTreeStuff deriving from CFormView

Drag a CTreeCtrl and plonk it your form view.

Add stuff to your tree control.

Regards,

axe

Prakash Nadar24-Mar-04 19:50

24-Mar-04 19:50

Solution is good, but really this wont go to the inbox of the original poster. Smile | :)

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prakashnadar@msn.com

Tip of the day of visual C++ IDE.
"We use it before you do! Visual C++ was developed using Visual C++"

axid3j1al24-Mar-04 20:11

axid3j1al

24-Mar-04 20:11

I am missing your point.

Prakash Nadar24-Mar-04 21:44

24-Mar-04 21:44

lordgreg is the person who needs the help... so when you reply to me he will not be notified about the solution that you have posted. Thats what i meant to say.

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prakashnadar@msn.com

Tip of the day of visual C++ IDE.
"We use it before you do! Visual C++ was developed using Visual C++"

axid3j1al25-Mar-04 10:59

axid3j1al

25-Mar-04 10:59

Check back on code project for answer to your question.

http://www.codeproject.com/script/comments/forums.asp?forumid=1647&df=100&app=50&fr=101

EMF editor / EMF SDK

al_in_the_city24-Mar-04 9:09

al_in_the_city

24-Mar-04 9:09

Hi Everyone,
I am looking for a SDK or a developer's tool that will allow me to write a program that will allow the user to visually edit an EMF file. In other words, I would like my program to let the user select different components of an EMF file and move or modify them.

Does anyone know of a SDK (C++ bases preferred) commercial or shareware, that could assist me in this project?

Any help is greatly appreciated.

Thanks,
A.

0v3rloader24-Mar-04 9:16

24-Mar-04 9:16

Take a look at this site:

http://www.pcltools.com/propt2.php[^]

dNimrod#X
________________________

al_in_the_city24-Mar-04 9:29

al_in_the_city

24-Mar-04 9:29

Thank you for the suggestion but this SDK looks to be a conversion tool rather than an editing/manipulation tool, which is what I really need. Once again thank you for the help and please keep me posted if you think of other sites.

A.

0v3rloader24-Mar-04 9:40

24-Mar-04 9:40

How about this:

{
http://www.leadtools.com/SDK/Vector/Vector-Products-n.htm[^]
http://www.leadtools.com/SDK/Vector/Vector-Imaging.htm[^]
}

Hope this helps,

dNimrod#X
________________________

SQLConnect --Invalid string or buffer length

al_in_the_city24-Mar-04 9:49

al_in_the_city

24-Mar-04 9:49

Thanks so much, you are great. I've been playing with their stuff all day and much to my chagrin it doesn't really do what I want. They are more about raster files and all that other stuff.

It's amazing to me that no one has come up with a SDK that allows you to edit an EMF file. I can't beleive I might have to develop this from scratch. I just hope I'm not missing something.

Anyhow, thanks again. I really appreciate it.

A.

BlackDice24-Mar-04 9:06

Re: SQLConnect --Invalid string or buffer length

24-Mar-04 9:06

I'm trying to use the SQLConnect function but I keep getting the odbc error 'Invalid string or buffer length'. In all the documentation it says to use SQL_NTS , but that doesn't work. It still doesn't work even if I put the actual string length in. Anybody know what's happening?

If it's broken, I probably did it

bdiamond

0v3rloader24-Mar-04 9:18

Re: SQLConnect --Invalid string or buffer length

24-Mar-04 9:18

How are you calling SQLConnect?

dNimrod#X
________________________

BlackDice24-Mar-04 9:32

Re: SQLConnect --Invalid string or buffer length

24-Mar-04 9:32

forgive me for being slow, but I don't really understand your question. Here's a sample of the code I'm using, (the slen variables were just added for testing):

//set the app's odbc version
		sr = SQLSetEnvAttr(hOdbcEnv, SQL_ATTR_ODBC_VERSION
			,(SQLPOINTER)SQL_OV_ODBC3, SQL_IS_INTEGER);
		if(BadSqlReturn(sr))
			MessageBox("Error In Setting ODBC Version.");

		//allocate connection
		sr = SQLAllocHandle(SQL_HANDLE_DBC, hOdbcEnv, & hDbConn);
		if(BadSqlReturn(sr))
			MessageBox("Error In Allocating Connection.");

		//set connect timeout
		sr = SQLSetConnectAttr(hDbConn,SQL_ATTR_LOGIN_TIMEOUT,(void*)5,0);
		if(BadSqlReturn(sr))
			MessageBox("Error In Setting Login Timeout.");
		//connect to data source
		char szConnectString[512];
		sprintf(szConnectString,"%s",strConnect);
		SQLSMALLINT slen = strlen(szConnectString);
		SQLSMALLINT slen2 = strlen(szUID);
		SQLSMALLINT slen3 = strlen(szAuthStr);

		if(slen % 2) slen++;
		if(slen2 % 2) slen2++;
		if(slen3 % 2) slen3++;
		
		sr = SQLConnect(hDbConn,(UCHAR*)szConnectString,SQL_NTS
			,(UCHAR*)szUID,SQL_NTS
			,(UCHAR*)szAuthStr,SQL_NTS);		
		if(BadSqlReturn(sr))
		{
			AfxMessageBox("connection error");
			displayODBCError(sr,"");
			return 0;
		}

If it's broken, I probably did it

bdiamond

0v3rloader24-Mar-04 9:43