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I am porting a dll to VC++2005. While building i am getting the following error
Error 5 error C2440: '=' : cannot convert from 'int (__cdecl *)(NC_string *)' to 'int (__cdecl *)(void)'
in the code.
case NC_STRING :
xlen_funct = NC_xlen_string ;(i am getting error here)
break ;
Any help will be appreciated.
Regards, Eswari
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The function NC_xlen_string has an argument of type NC_string* but the type of the function pointer xlen_funct expects a function with no arguments.
Steve
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A little bit more information would be usefull.
What is NC_xlen_strin ? And what is xlen_funct ?
By the error description it seems that it is a function, am I right ? Then I don't see at all what you are trying to do. Can you explain ?
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both are functions. first one is a int (*xlen_funct)(void).
SEcond one is
extern int NC_xlen_string PROTOTYPE((
NC_string *cdfstr
));
and this is where these are being used.
case NC_STRING :
xlen_funct = NC_xlen_string ;
break ;
which cast i have to use and how?
Regards, ESwari
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subramanyeswari wrote: which cast i have to use and how?
You can't cast from one into the other. They don't have the same prototype (one is accepting a parameter and the other does't).
But why would you ever do such a thing ? 
By the way, what is the macro PROTOTYPE doing ?
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Do ***NOT*** cast. The compiler is making a valid statement and casting the problem away will turn a compile time error (good) into a runtime error (bad). The real problem is your function pointer is of the incorrect type (from what I've seen so far).
Steve
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Show me the type of len_funct. Therein lies the error (from what I've seen so far).
Steve
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h, i gotta question. i built lux meter base on pc and use adc 12 bit, parallel port, and vb programing. could u help me to give some code to finish this project!
i fond a problem when i start to read the input signal.
sexpistols
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First: This is the Visual C++ / MFC discussion board. So it's not for VB questions.
Second:
mrizki wrote: i fond a problem
What problem? Don't expect us to mind-read!
Alcohol. The cause of, and the solution to, all of life's problems - Homer Simpson
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kakan wrote: Don't expect us to mind-read!
he he he! he wanted you to be god!
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You
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mrizki wrote: built lux meter base on pc and use adc 12 bit, parallel port, and vb programing. could u help me to give some code to finish this project!
how much you have coded!... do you designed something
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You
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How to disbel the popup menu that was displayed when window button (start menu) is clicked (in keyboard)
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prathuraj wrote: How to disbel the popup menu that was displayed when window button (start menu) is clicked (in keyboard)
system level hook!
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You
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i have tried in the follwing way to disable left window key
if (pMsg->message == WM_KEYDOWN && pMsg->wParam == VK_LWIN )
{
pMsg->wParam = NULL;
}
But it does not disabled the key what is a problem.
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The code that you posted will only intercept keystrokes when your app has the input focus. When you click on the Start button, you are shifting focus away from your app, and so you will never see those keystrokes. As ThatsAlok said, you need to do this on a system-wide basis.
Best wishes,
Hans
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Hi everybody.
I am using this cite first time, so I am not aware of the specific ways of asking any question.
My problem is that I have a file published by sharing the folder containing that file. I don't want to allow other users, who will access that file through LAN to delete and to copy. But they should be able to read the contents of that file.
I tried using the CreateFile API with no sharing mode as one of the argument but if I do so then nobody is able to open it.
Is there any way to achieve this?
Pavan Deshpande
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Are _chmod, _wchmod helpful to you solve your problem ?
Regards,
Paresh.
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Can you restrict their access through ACL?
"A good athlete is the result of a good and worthy opponent." - David Crow
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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I wonder whats the paradigm of learning...
Let me clear what I am saying...
What our learning process is:
1... Get a very minimal architectural view of a technology (suppose .NET)
2... Jump in and Code! Where stuck, consult documentation and then back to keyboard!
Here we slove the problems on fly. We solve and understand them as we encounter them. For instance,
I want to have a small menu to appear under a specific word. That needs to customize the rich text box. Now Whats the correct way? Complete a books or two on the topic then start working on learn as you go along?
Which one of is the approach of the professionals?
Regards.
Polite Programmer
More Object Oriented then C#
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I sort of take the shotgun approach - that is, I take all approaches. I first read up a little, then jump in and start codeing, and then read more in depth. When you first start learning a new technology it can be daunting so it's best not to dwell. Try to be flexible - don't get hung up on something.
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Hi all,
Im VC++ illiterate and would like to know on how to interface the serial port using VC++..
See my ultimate goal is to control the lighting of LEDs via serial port using VC++...
Thanks!
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Hey
Use CreateFile,ReadFile,WriteFile function of
Winbase.h
You can also find help of these functions on msdn too
Regards,
Pankaj Sachdeva
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The serial port uses +-12 Volts for signalling, and has just a few pins to use. Consider using the parallel port instead. It has 5 Volts, and has at least 10 pins you can use.
Alcohol. The cause of, and the solution to, all of life's problems - Homer Simpson
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