Sorry. That was a typo. What you said is right. I found a solution for this by setting a timeout using the CInternetSession class.
However I have ended up with another similar problem. I am reading a file over the network drive using CFIle class. Now if the network drive access is lost (due to any reason) can we get to know this. The read() function continues without breaking. How can this be solved?? Please help...
I am creating a application in which I am saving a image as bmp using BITMAPINFOHEADER.
But this structure' height/Width variable is saving image size in Pixels and that i coming fine If i check in Photoshop. But Its Document size[height and width in inches] is not coming fine.As its resolution is by default 72.
And then this Document size is not matching up with mine application ht/width in inches.
Is there any other member varible of BITMAPINFOHEADER structure where I can directly set image size[ht/wd] in inches?
Or any other way So that i can get actual size of image If i open it in some image viewer?
What is the best way to create an edit box (derived from CEdit) that can draw a red line under wrong words for example. and then user can right click on it and correct it from a sugested menu list. (Like what visual assist does in Visual Studio)
Doing it insdie OnPaint() is not easy because we must take care of single or multi line, and maybe some other thing.
Sorry you all for bothering on Sunday:
I'm new using C++ and I need to simulate a Social network, but I'm having troubles doing a "member": this
is the code is very simple:
I hava a header called "structs.h"
Miembro(int a, int b, int c)
id = a;
activo = b;
pass = c;
//Main is like:
#include "structs.h"usingnamespace std;
nombre = "Jorge";
cout <<" "<< nombre << endl;
Miembro memb = new Miembro(1, 1, 123);
// return 0;
F:\main.cpp In function 'int main()':
17 37 F:\main.cpp [Error] conversion from 'Miembro*' to non-scalar type 'Miembro' requested
F:\Makefile.win [Error] [main.o] Error 1 (if this is the only error: please check your library includes)
and this will allocate the memb object on the stack. I think this is the recommended way to allocate small objects whenver possible. Objects allocated on the stack are deleted automatically for you when they run out of scope (usually at the end of your function or if-block or whatever). If you allocate an object from the heap then you get a pointer to the heap and you must delete that object via its pointer when you done with it using the delete keyword. By forgetting to delete heap objects your program might continuously 'eat' the memory until you exit the program (this memory waste is called 'memory leak').
Those warning messages are pretty nasty. They offered me no help at all in solving the problem. At first I thought it may be a result of being structs, rather than classes - no, of course not. Default access is public instead of private, but it did then get me thinking.
I was writing out the constructors when the idea of default constructors hit me in the face..
Notice in your NodoMiembro definition, you have a variable of type Miembro? Well, have a close look at the way it's defined - It's just Miembro persona;
Just back-up a bit and think what would happen if you tried to instantiate the struct like this in your main() - it would fail miserably.
Miembro(int a, int b, int c)
id = a;
activo = b;
pass = c;
Basically, the fix is to add default constructors to both the the Miembro and the NodoMiembro structs.
Just want to mention an exotic exception: If Miembro was a POD type then the two statements had different effects. The first wouldn't initialize the variable while the second would zero initialize. PODs are primitive types - ints, bools, etc... and structs/classes without any explicitly declared constructors/destructor/virtual methods (briefly: C-struct compatible stuff).
No not like that, sorry I wasn't being really specific, I mean't like this. See where the labels "Safe Mode" on each corner of the monitor or screen, I want something exactly like that, but in order for it take effect once programmed, you need to reboot your computer.
Maybe what you told me is correct, I probably have to get a handle to the desktop of the computer desktop, then "fire in" the code.
Simple Thanks and Regards,
Brandon T. H.
Programming in C and C++ now, now developing applications, services and drivers (and maybe some kernel modules...psst kernel-mode drivers...psst).
Many of life's failures are people who did not realize how close they were to success when they gave up. - Thomas Edison
You can declare a global variable with the extern keyword. Misleadingly many people say "variable declaration" however most of the "variable declarations" are actually variable definitions. Definition == declaration + storage.
definition - test.cpp:
int g_MyVariable; // This "declaration" is fixing the location of the variable, its here inside this cpp so this is a definition.
declaration - test.h:
externint g_MyVariable; // This is a declaration because this just tells that there is an int variable somewhere with "g_MyVariable" name.
you can use the global variable anywhere by including test.h
Note: Using an extern variable as communication between compilation units is a bad design. Not using it is laudable!
The variable declaration specifies the type and the link-name of the data. You usually put declarations to header files. When a .cpp file compiles and includes a header that declares a variable then that .c/.cpp file can use the variable despite the fact that the location of the variable isn't known because it can generate code that uses the specified type as needed and the link-name of the variable is known so later you can link the generated object file of your .c/.cpp to the object file of another .cpp that actually contains the data. A variable definition specifies the type and the link-name of the data like the declaration, but it also specifies the actual location of the data. The variable is located where you put the definition. For a variable you can use only one definition in one of your .c/.cpp files, your variable will be located in the generated object file of this .c/.cpp file, but you can have many declarations in other .c/.cpp files by including in a header with the declaration to many .c/.cpp files. This way the generated object file of the other .c/.cpp files will just have a reference by name to the defined variable if you actually used the declaration where you included it.
I have a MFC application created in C++ 6.0, it works fine in Window XP. When run this application in Window 7, if the dialog has progressbar on it, this dialog cannot be launched, but if you remove this progressbar or for dialog without progressbar, everything is fine.
But no all Window 7 computers have this error, only very few computer have this problem.
If the same .exe file runs on some W7 machines and not others, then the problem is clearly something environmental on the machines that fail. Check for missing DLLs on the failing machines. Or build your application with MFC and C RTL as static libraries and try it that way.
The OnInitDialog() occurs after the creation of a window, so there's the possibility that the creation is failing and you're not checking that. Check the return of DoModal() and GetLastError() for errors.
re bit fields:
The standards (C and C++) explicitly state that the address-of & operator cannot be applied to bit fields, and consequently there are no pointers to bit fields.
Given that the layout of bit fields within some integral type is implementation-dependent, that all makes a lot of sense.
Software rusts. Simon Stephenson, ca 1994. So does this signature. me, 2012