C / C++ / MFC Discussion Boards

Re: Working with dlls

Kiran Pinjala24-Aug-06 1:21

Kiran Pinjala

24-Aug-06 1:21

prasad_som wrote:
Let implicit linking be there,

Is it not possible to instantiate the imported class and callin its functions with explicit linking?

KIRAN PINJARLA

Re: Working with dlls

Cedric Moonen24-Aug-06 1:24

Cedric Moonen

24-Aug-06 1:24

No (as I already said before). When you load a dll explicitely, you first 'load' the dll with LoadLibrary but that doesn't imply anything. You have just loaded the dll in memory, next you need to retrieve the address of a function by calling GetProcAddress so that you can call a function from inside your dll. See, how are you gonna 'get' your class that way ??

Why don't you simply go with implicit linking ? It is much more easier to do and everything is managed for you. What is the problem there ?

Cédric Moonen
Software developer

Charting control [Updated - v1.1]

Re: Working with dlls

Waldermort24-Aug-06 4:19

Waldermort

24-Aug-06 4:19

You can't export a class directly, you can can make a wrapper to do a similar thing. Inside the dll you would need to instead export a function which would initialise the class for you and return a pointer to it.

Re: Working with dlls

Kiran Pinjala24-Aug-06 20:04

Kiran Pinjala

24-Aug-06 20:04

waldermort wrote:
instead export a function which would initialise the class for you and return a pointer to it

Thank you so much. This is the solution for which i have been asking for.
One again thank you waldermort.

KIRAN PINJARLA

Re: Working with dlls

Kiran Pinjala24-Aug-06 20:57

Kiran Pinjala

24-Aug-06 20:57

Ok i did it and got the pointer of the class form dll exported function.
Now how to call the member functions of that class?
Note: we are linking the dll by LoadLibrary(explicitly) only.

KIRAN PINJARLA

Re: Working with dlls[modified]

toxcct24-Aug-06 0:36

toxcct

24-Aug-06 0:36

you asked this 3 hours ago here[^] Mad | :mad:

TOXCCT >>> GEII power

[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]

Re: Working with dlls[modified]

Kiran Pinjala24-Aug-06 0:43

Kiran Pinjala

24-Aug-06 0:43

But nobody answered. Confused | :confused:

KIRAN PINJARLA

Re: Working with dlls[modified]

Don Box24-Aug-06 1:19

Don Box

24-Aug-06 1:19

Come online
at fitiyal@yahoo.com

Re: Working with dlls[modified]

toxcct24-Aug-06 1:51

toxcct

24-Aug-06 1:51

kiran.pinjarla wrote:
But nobody answered.

i did !

moreover, you are on a forum, not a chat... 3h is not an acceptable time span to repost a question.

TOXCCT >>> GEII power

[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]

Re: Working with dlls[modified]

Hamid_RT24-Aug-06 2:07

Hamid_RT

24-Aug-06 2:07

and in this forum we have toxcct Smile | :)

WhiteSky

Re: Working with dlls[modified]

Kiran Pinjala24-Aug-06 2:10

Kiran Pinjala

24-Aug-06 2:10

I am sorry. I wont repeat this agiain. Frown | :(

KIRAN PINJARLA

Re: Working with dlls[modified]

toxcct24-Aug-06 2:43

toxcct

24-Aug-06 2:43

kiran.pinjarla wrote:
I wont repeat this agiain

not what i meant, but we have some rules to respect (everybody here, even me) dicted by the webmaster here[^].

nevermind.

TOXCCT >>> GEII power

[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]

Calling a ATL COM DLL interface from VBScript routine

AKSIVAKUMAR23-Aug-06 23:53

AKSIVAKUMAR

23-Aug-06 23:53

All,

I am working on ATL COM DLL and I am writing a DLL which exposes few interfaces to the application. These interfces can be called either from the VBScript or C++ routine. Any rules which i need to follow especially for having a parameter[[IN], [OUT]. As every one knows that VBScript has data type limitations and we can't pass all the parameters as like in normal. For example the IN and OUT parameter will be used to send and receive values from the interfce and should always be having a VARIANT* data type.

For example:

1. STDMETHODIMP CXX::FUNC_XX( BYTE bnl,BYTE bCurrCl,VARIANT* vSData,BOOL boFlag, SHORT *pRetVal)
2. STDMETHODIMP CXXX::FUNC1_XXX(VARIANT* vReconfig,SHORT *pRetVal)

Please let me know if any one is having suggestions or sample ATL COM DLL which can be called from VBScript.

Thanks,
AKS

Re: Calling a ATL COM DLL interface from VBScript routine

uday kiran janaswamy24-Aug-06 0:35

uday kiran janaswamy

24-Aug-06 0:35

hi aks,

Variant are used for Automation, so after creating the ATL Dll just compile that DLL.

and create an instance of the Dll in VBScript. and pass the the Arugments from the VBScript.

VARIANT is used for that purpose only it is used for Purely Automation Purpose.

good luck.

Uday kiran

Visual Studio building whole project instead of modified files

flippydeflippydebop23-Aug-06 23:45

flippydeflippydebop

23-Aug-06 23:45

im using VisualStudio2005 and everytime i hit F5 to compile VS is compiling all files for the project instead of just the files i have modified! - has anyone come across this before?

I was thinking that some where alongthe lines a file like stdafx.h was getting modified causing
the knock on effect to compile the whole project but i am not changing this or similar files!

Re: Visual Studio building whole project instead of modified files

Michael Dunn24-Aug-06 0:14

Michael Dunn

24-Aug-06 0:14

The usual cause for that situation is one of your files (or a header file in your include path) has had its last-modified timestamp changed to a date in the future.

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

LINKS~! Ericahist | PimpFish | CP SearchBar v3.0 | C++ Forum FAQ

Re: Visual Studio building whole project instead of modified files

flippydeflippydebop24-Aug-06 0:56

flippydeflippydebop

24-Aug-06 0:56

hmmmm.... i guess what i need is a a utility where you can watch a directory and see if any files change! - Then i could point it at my project files

owner draw menus

radhika2823-Aug-06 23:40

radhika28

23-Aug-06 23:40

hi friends,
Can any one suggest me detailed steps to have owner draw menus in a dialog based application.I referred some articles from codeguru and codeproject,but i didnot get a neat idea about it.

Re: owner draw menus

Hamid_RT23-Aug-06 23:54

Hamid_RT

23-Aug-06 23:54

Did you see Menu in codeproject its very clear.
Owner Drawn Menu with Icons, Titles and Shading[^]

WhiteSky

Re: owner draw menus

radhika2824-Aug-06 0:33

radhika28

24-Aug-06 0:33

hi,
Thanks for ur reply.I have done that application but i got errors.And other than this i have found no article with a neat description.Can you suggest any other useful article.

Thanks in advance,
Radhika.

Re: owner draw menus

Hamid_RT24-Aug-06 0:57

Hamid_RT

24-Aug-06 0:57

Whats error?

WhiteSky

Re: owner draw menus

radhika2824-Aug-06 1:17

radhika28

24-Aug-06 1:17

The error i got it is,
fatal error C1083: Cannot open include file: 'NewMenu.h': No such file or directory.(in stdAfx.h file)
If i make that particular line as a comment i am getting so many errors like,E:\DownLoads\ownerdrawmenu\ownerdrawmenu.cpp(45) : error C2653: 'CNewMenu' : is not a class or namespace name
E:\DownLoads\ownerdrawmenu\ownerdrawmenu.cpp(45) : error C2065: 'SetMenuDrawMode' : undeclared identifier
E:\DownLoads\ownerdrawmenu\ownerdrawmenu.cpp(45) : error C2653: 'CNewMenu' : is not a class or namespace name
E:\DownLoads\ownerdrawmenu\ownerdrawmenu.cpp(45) : error C2065: 'STYLE_XP' : undeclared identifier
ownerdrawmenuDlg.cpp
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(18) : error C2504: 'CNewDialog' : base class undefined
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(41) : error C2614: 'CAboutDlg' : illegal member initialization: 'CNewDialog' is not a base or member
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(48) : error C2248: 'DoDataExchange' : cannot access protected member declared in class 'CWnd'
c:\program files\microsoft visual studio\vc98\mfc\include\afxwin.h(2414) : see declaration of 'DoDataExchange'
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(48) : error C2352: 'CWnd::DoDataExchange' : illegal call of non-static member function
c:\program files\microsoft visual studio\vc98\mfc\include\afxwin.h(2414) : see declaration of 'DoDataExchange'
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(53) : error C2653: 'CNewDialog' : is not a class or namespace name
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(64) : error C2614: 'COwnerdrawmenuDlg' : illegal member initialization: 'CNewDialog' is not a base or member
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(74) : error C2653: 'CNewDialog' : is not a class or namespace name
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(80) : error C2653: 'CNewDialog' : is not a class or namespace name
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(85) : error C2065: 'ON_WM_InitMenuPopup' : undeclared identifier
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(85) : error C2065: 'pMenu' : undeclared identifier
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(85) : error C2065: 'nIndex' : undeclared identifier
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(85) : error C2065: 'bSysMenu' : undeclared identifier
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(87) : error C2059: syntax error : '{'
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(87) : error C2143: syntax error : missing ';' before '{'
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(87) : error C2447: missing function header (old-style formal list?)
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(87) : error C2143: syntax error : missing ';' before '}'
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(94) : error C2653: 'CNewDialog' : is not a class or namespace name
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(96) : error C2065: 'm_DefaultNewMenu' : undeclared identifier
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(96) : error C2228: left of '.LoadToolBar' must have class/struct/union type
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(130) : error C2039: 'DoModal' : is not a member of 'CAboutDlg'
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(17) : see declaration of 'CAboutDlg'
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(134) : error C2653: 'CNewDialog' : is not a class or namespace name
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(163) : error C2653: 'CNewDialog' : is not a class or namespace name
Generating Code...
Error executing cl.exe.

ownerdrawmenu.exe - 26 error(s), 0 warning(s)

Thanks,
Radhika.

Re: owner draw menus

prasad_som24-Aug-06 1:22

prasad_som

24-Aug-06 1:22

all error are related to first error. Locate 'NewMenu.h' and include it appropriately.

Prasad
Notifier using ATL

Re: owner draw menus

Hamid_RT24-Aug-06 1:28

Hamid_RT

24-Aug-06 1:28

It seems your error "NewMenu.h" did you include this file and path is correct

WhiteSky

Re: owner draw menus

radhika2824-Aug-06 2:12

radhika28

24-Aug-06 2:12

Thanks for your suggestion i have gave the path wrong.But again some errors came.The errors came in the places where i have changed of CDialog to CNewDialog and also at the membervariable statement( m_DefaultNewMenu.LoadToolBar(IDR_MAINFRAME);) which is a statement in oninitdialog function.In the code project sample application they didnot gave the type of that member variable.The errors i got are,
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(64) : error C2614: 'COwnerdrawmenuDlg' : illegal member initialization: 'CNewDialog' is not a base or member
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(74) : error C2248: 'DoDataExchange' : cannot access protected member declared in class 'CWnd'
c:\program files\microsoft visual studio\vc98\mfc\include\afxwin.h(2414) : see declaration of 'DoDataExchange'
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(74) : error C2352: 'CWnd::DoDataExchange' : illegal call of non-static member function
c:\program files\microsoft visual studio\vc98\mfc\include\afxwin.h(2414) : see declaration of 'DoDataExchange'
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(80) : error C2248: 'messageMap' : cannot access protected member declared in class 'CNewDialog'
e:\downloads\ownerdrawmenu\newmenu.h(896) : see declaration of 'messageMap'
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(85) : error C2065: 'ON_WM_InitMenuPopup' : undeclared identifier
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(85) : error C2065: 'pMenu' : undeclared identifier
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(85) : error C2065: 'nIndex' : undeclared identifier
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(85) : error C2065: 'bSysMenu' : undeclared identifier
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(87) : error C2059: syntax error : '{'
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(87) : error C2143: syntax error : missing ';' before '{'
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(87) : error C2447: missing function header (old-style formal list?)
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(87) : error C2143: syntax error : missing ';' before '}'
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(94) : error C2352: 'CNewDialog::OnInitDialog' : illegal call of non-static member function
e:\downloads\ownerdrawmenu\newmenu.h(888) : see declaration of 'OnInitDialog'
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(121) : error C2065: 'm_DefaultNewMenu' : undeclared identifier
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(121) : error C2228: left of '.LoadToolBar' must have class/struct/union type
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(135) : error C2248: 'OnSysCommand' : cannot access protected member declared in class 'CWnd'
c:\program files\microsoft visual studio\vc98\mfc\include\afxwin.h(2330) : see declaration of 'OnSysCommand'
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(135) : error C2352: 'CWnd::OnSysCommand' : illegal call of non-static member function
c:\program files\microsoft visual studio\vc98\mfc\include\afxwin.h(2330) : see declaration of 'OnSysCommand'
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(164) : error C2248: 'OnPaint' : cannot access protected member declared in class 'CWnd'
c:\program files\microsoft visual studio\vc98\mfc\include\afxwin.h(2295) : see declaration of 'OnPaint'
E:\DownLoads\ownerdrawmenu\ownerdrawmenuDlg.cpp(164) : error C2352: 'CWnd::OnPaint' : illegal call of non-static member function
c:\program files\microsoft visual studio\vc98\mfc\include\afxwin.h(2295) : see declaration of 'OnPaint'
Error executing cl.exe.

ownerdrawmenu.exe - 19 error(s), 0 warning(s)

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