Re: When to use constant variable, and when to use preprocessor/macro constants? - C / C++ / MFC Discussion Boards

Re: How to expand a button after clicking it

Member 46556858-Sep-08 23:30

Member 4655685

8-Sep-08 23:30

ok anyway do u know the answer?

Re: How to expand a button after clicking it

toxcct8-Sep-08 23:31

toxcct

8-Sep-08 23:31

have you checked this reply[^] ?
is it something like this you want ?

if so, you have penty of other article about owner drawn buttons in C/C++/MFC here at codeproject:
http://www.codeproject.com/KB/buttons/#Button%20Controls%20-%20Owner-draw%20buttons[^]

My Favorite : FooButton[^]

[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

Re: How to expand a button after clicking it

_AnsHUMAN_ 8-Sep-08 22:57

_AnsHUMAN_

8-Sep-08 22:57

Use MoveWindow to set the size of the button once the user has clicked on it and change the text. You need to check width so that the text fits in

m_btn.MoveWindow(10,10,300,40);

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: How to expand a button after clicking it

SandipG 8-Sep-08 23:17

SandipG

8-Sep-08 23:17

I think you want something like this

Push Menu Button[^]

or Split Button[^]

Regards,
Sandip.

When to use constant variable, and when to use preprocessor/macro constants?

Member 55028798-Sep-08 22:08

Member 5502879

8-Sep-08 22:08

I have a question as to when a preprocessor/macro constant should be used, and when a constant variable should be used.

Or it would be better if i put it in this way,
In a program,
when ONLY a macro constant MUST be used and not a constant variable?
when ONLY a constant variable MUST be used and not any macro constant?

Re: When to use constant variable, and when to use preprocessor/macro constants?

CPallini8-Sep-08 22:49

CPallini

8-Sep-08 22:49

Usually a constant variable is preferred (because it is typed).
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]

Re: When to use constant variable, and when to use preprocessor/macro constants?

shubhi8-Sep-08 23:02

shubhi

8-Sep-08 23:02

Refer these links. I hope these will be sufficient.
http://bytes.com/forum/thread212617.html[^]

http://forums.sureshkumar.net/data-structures-c-c-vc/38-diff-between-macro-c-nstant.html[^] Smile | :)

"We can't solve problems by using the same kind of thinking we used when we created them"

Re: When to use constant variable, and when to use preprocessor/macro constants?

sashoalm9-Sep-08 2:31

sashoalm

9-Sep-08 2:31

When using macros you should always remember that they're a direct text substitution, not something the compiler does. Imagine that before your source file is passed to the compiler a normal text manipulation program substitutes the macros with their values and this changed text of your source file is sent to the compiler.

One case when macros might be better than constants is when declaring arrays.

#define MAX_PATH 260
char arr[MAX_PATH];

always works, but

const int MAX_PATH=260;
char arr[MAX_PATH];

might give you problems on older compilers.

There is sufficient light for those who desire to see, and there is sufficient darkness for those of a contrary disposition.
Blaise Pascal

Re: When to use constant variable, and when to use preprocessor/macro constants?

SRKSHOME9-Sep-08 20:42

SRKSHOME

9-Sep-08 20:42

There is no rule when to use constants or when to use preprocessors..
It is always better to use constants because it is typed.

EditBox Problem

Dhiraj kumar Saini8-Sep-08 21:02

Dhiraj kumar Saini

8-Sep-08 21:02

I am not to able to enter the japanese and other language characters in my editbox control .

Please tell me what is the problem.

Thanx in advance