Re: array values - C / C++ / MFC Discussion Boards

As Chris said, you'll have to draw the selection yourself.

Look at the DRAWITEMSTRUCT sent to you by the WM_DRAWITEM message.
Then at the itemState member. Check for ODS_SELECTED flag.

Good luck,

Iain.

I am one of "those foreigners coming over here and stealing our jobs". Yay me!

See if this link helps - Multi-line List Control[^]

«_Superman_»

I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Polymorphism in C

hi,
i have a COLORREF itme.
i know how to convert it to RGB
but my Question is, if i can show the name of the color
Ex. RGB(255,0,0) --> Red
RGB(65-105-225 ) --> Royal Blue
Thanks'

You may use a std::map [^] for the purpose.
Of course you've to fill the map with proper values.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

A list of colors is available here[^]

- ns ami -

Nishad S wrote:
A list of colors is available here[^]

Great!

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
Never mind - my own stupidity is the source of every "problem" - Mixture

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
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Hi,

In the following code,i have assigned a value "test" to c variable. I have assigned the variable c to sz123. If i copied another value to c,the already assigend value in sz123[0] is getting overide. Can anyone please help me how to avoid this one?

LPSTR sz123[10];

char c[20] = "test";
sz123[0] = (LPSTR)c;

strcpy(c,"123");

thanks,

Well, there can be multiple answers to that, depending on your needs, what tools you have available, what environment you work in
e.g:

char sz123[10][20];
char c[20] = "test";
strcpy(sz123[0], c);
strcpy(c, "123");

or

std::string sz123[10];
char c[20] = "test";
sz123[0] = c;
strcpy(c, "123");

or

CString sz123[10];
char c[20] = "test";
sz123[0] = c;
strcpy(c, "123");

or

LPSTR sz123[10];
char c[20] = "test";
sz123[0] = (LPSTR)malloc(sizeof(c[0]) * (strlen(c) + 1));
strcpy(sz123[0], c);
strcpy(c, "123");
...
free(sz123[0]);

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> "It doesn't work, fix it" does not qualify as a bug report. <
> Amazing what new features none of the programmers working on the project ever heard of you can learn about when reading what the marketing guys wrote about it. <

you declared array of char pointers sz123 and stored the base adrress of string c to its 0th index. So whenever value in c changes, its reflected in sz123.
If you want to store each strings in sz123, allocate memory for each.

LPSTR sz123[10];

char c[20] = "test";

sz123[0] = new char[strlen(c)+1];
strcpy(sz123[0], c);

strcpy(c,"123"); //wont affect sz123[0]

Remember you're not really copying values around, you're copying pointers. So when you do:

sz123[ 0 ] = c;

You're just creating an alias to the block of memory that contains "hello." I'd suggest (unless you're stuck programming in C) to avoid using character arrays, character pointers and C style strings and just use C++ strings - then when you copy them around you're actually copying values and not aliases.

Cheers,

Ash

sz123[0] = _strdup(c);
//...
free(sz123[0]);

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Is it possible to use the globally declared LPSTR variable in other class by using extern function?

Karthika85 wrote:
Is it possible to use the globally declared LPSTR variable in other class by using extern function?

You're mixing a bit different domains here. If the variable is global then you may use it everywhere (don't forget to call free when you no longer need the string).
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

No,I am not able to use the globally declared sz123[0] variable in another class:

In class1:
LPSTR sz123[10];
char c[20] = "test";
sz123[0] = (LPSTR)malloc(sizeof(c[0]) * (strlen(c) + 1));
strcpy(sz123[0], c);

In class2:

extern LPSTR sz123[10];

char ch1[20];
strcpy(ch1,sz123[0]);

It is showing the following error

"error LNK2001: unresolved external symbol "char * * sz123":

You must be precise. A global variable cannot be declared inside a class (it wouldn't be global).
So what do you intend to do?
Do you want to use a global variable?
Do you want to make an object's member variable available to objects of different classes?
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

I decalred a global variable array not class variable in one class and i want to use that gloabl variable in another class.

And what's your problem?

For instance:

// global.cpp
int global_counter=0;

and

// source.cpp
extern int global_counter;

void show_counter()
{
  cout << global_counter << endl;
}

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

previously i used static keyword. so,i got that error. now i removed the keyword static.

You need to declare it extern in all modules, and initialize it in only one.

It's time for a new signature.

Got it.I should not use static keyword to use in other cpp files

Of course. The static qualifier, for varibles declared outside classes, makes the variables themselves having file-scope.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Hi,

I am using combobox control in a tabbed dialog box.
Whenever user presses enter key from combobox.
The tabbed dialog disappears means it will close.

For that i am deriving my own combobox
and overriding the WM_CHAR event.

But the control is not coming in that event.

How to catch the enter key event from the combobox.

But the same thing is happening in My derived edit control.

Maybe WM_GETDLGCODE[^] can help you with that.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> "It doesn't work, fix it" does not qualify as a bug report. <
> Amazing what new features none of the programmers working on the project ever heard of you can learn about when reading what the marketing guys wrote about it. <

Ok thank you

it is working.

Cool, yourwelcome.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> "It doesn't work, fix it" does not qualify as a bug report. <
> Amazing what new features none of the programmers working on the project ever heard of you can learn about when reading what the marketing guys wrote about it. <