C / C++ / MFC

15-Jun-04 0:58

when you add graphically an edit box into your dialog, right click into the editbox, select the properties menu item at the bottom, and there you are...

TOXCCT >>> GEII power

Re: RichEdit Control

Pazzuzu15-Jun-04 1:05

Pazzuzu

15-Jun-04 1:05

Thank you...

Telephony(TAPI)

Fouad_kayali14-Jun-04 23:42

Fouad_kayali

14-Jun-04 23:42

How can i get full documentation for Telephony applications?
can you help me to make an application which can recieve a call, and data from caller?
How to play voice message at recieving the call?

Re: Telephony(TAPI)

Michael P Butler15-Jun-04 0:01

Michael P Butler

15-Jun-04 0:01

Fouad_kayali wrote:
How can i get full documentation for Telephony applications?

MSDN and the Platform SDK are probably the best resources for TAPI documentation and examples.

Fouad_kayali wrote:
can you help me to make an application which can recieve a call,

This sample[^] here helped me when I first started programming with TAPI back in '98.

Michael

CP Blog [^]

Nice discussion point ?

V.14-Jun-04 23:11

14-Jun-04 23:11

-> this stood in the code:
bool bAllowUnvalidateTextResult = !!siteFlags.GetNbrValue(ALLOW_UNVALIDATE_TEXTRESULT);

Colleagues told me the "!!" was to make sure it was 0 or 1 false or true.
Is this so? Why not
static_cast<bool>(siteFlags.GetNbrValue(ALLOW_UNVALIDATE_TEXTRESULT)); ???

tnx.

"If I don't see you in this world, I'll see you in the next one... and don't be late." ~ Jimmy Hendrix

Iain Clarke, Warrior Programmer

Iain Clarke, Warrior Programmer14-Jun-04 23:28

14-Jun-04 23:28

The !! has been around for a while, long before these new fangled
template thingies. Its also less typing!

Also consider:

bool bAllowUnvalidateTextResult = 1 && siteFlags.GetNbrValue(ALLOW_UNVALIDATE_TEXTRESULT);

bool bAllowUnvalidateTextResult = siteFlags.GetNbrValue(ALLOW_UNVALIDATE_TEXTRESULT) ? true : false;

I still use the ? : construction a lot.

A couple of years ago, I showed some of my code to a fellow (non-colleague) programmer, who said
"It's obvious you've been programming for a long time". He never told me if that was a compliment
or not!

toxcct14-Jun-04 23:38

14-Jun-04 23:38

but don't bool bAllowUnvalidateTextResult = siteFlags.GetNbrValue(ALLOW_UNVALIDATE_TEXTRESULT); work too ???
bAllowUnvalidateTextResult is a bool, so, it will accept true or false values ; true for any non-zero values, false otherwise...

of course, a static_cast<bool> would have been more explicit and more correct, i think my code work, but i don't wan't to test it Big Grin | :-D

TOXCCT >>> GEII power

Antony M Kancidrowski15-Jun-04 0:03

Antony M Kancidrowski

15-Jun-04 0:03

Yes it will work but IIRC it brings up a warning on compilation saying that their is a performance issue when forcing the value to bool.

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fuity and sweet.
I'm jelly, what am I? - David Williams (Little Britain)

Antony M Kancidrowski15-Jun-04 0:08

Antony M Kancidrowski

15-Jun-04 0:08

I have seen this before, and if not commented such it can be misleading. Is there a mistake, i.e. did the programmer intend to use a single "!" ?

It is always better to explicitly state the intended conversion.

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fuity and sweet.
I'm jelly, what am I? - David Williams (Little Britain)

David Crow15-Jun-04 2:31

David Crow

15-Jun-04 2:31

V. wrote:
Colleagues told me the "!!" was to make sure it was 0 or 1 false or true.
Is this so?

Yes, that's what it does. It's also very portable, whereas static_cast and bool are not.

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

toxcct15-Jun-04 2:45

15-Jun-04 2:45

sorry but the static_cast keyword is part of the C++ language... portable so.

for the portability of bool, i agree. We should prefer BOOL instead...

TOXCCT >>> GEII power

David Crow15-Jun-04 2:59

David Crow

15-Jun-04 2:59

toxcct wrote:
sorry but the static_cast keyword is part of the C++ language... portable so.

Maybe on the newer compilers, but not on the ones I started with. It's also not available in C. The point was that !! will work across the board whereas static_cast and bool will not.

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

toxcct15-Jun-04 3:20

15-Jun-04 3:20

ok if you want to port code from C++ to C... but you'll probably encounter many other problems...

TOXCCT >>> GEII power

V.15-Jun-04 3:01

15-Jun-04 3:01

but BOOL would in turn go into the whole idea of a boolean (only true/false) Smile | :)

if I'm not mistaken takes a bool less memory then a BOOL (in Java it is so I think), but then again maybe not.

but that would take us too far...

"If I don't see you in this world, I'll see you in the next one... and don't be late." ~ Jimmy Hendrix

toxcct15-Jun-04 3:26

15-Jun-04 3:26

why BOOL would take more memory than a bool ??
one byte doesn't it ? Big Grin | :-D

TOXCCT >>> GEII power

V.15-Jun-04 3:42

15-Jun-04 3:42

Is a BOOL 1 Byte? I thought it was of size equal to an integer (cause 1,2,3,4,5,6,... = TRUE) bool doesn't know 0,1,2,3,4,...

bool is for certain 1 byte,
don't know about BOOL

Not really important when working with enough memory Wink | ;)

"If I don't see you in this world, I'll see you in the next one... and don't be late." ~ Jimmy Hendrix

Tim Smith15-Jun-04 3:51

Tim Smith

15-Jun-04 3:51

BOOL is an "int" and can have the same values as an int.

Tim Smith

I'm going to patent thought. I have yet to see any prior art.

bikram singh15-Jun-04 3:58

bikram singh

15-Jun-04 3:58

BOOL is 4 bytes on 32-bit systems.
bool, on the other hand, is 1 byte.

Bikram Singh

toxcct15-Jun-04 4:00

15-Jun-04 4:00

oh... why not.

and can we have an evidence of what you are telling us ?

TOXCCT >>> GEII power

Sure you can :)

bikram singh15-Jun-04 4:49

bikram singh

15-Jun-04 4:49

Fire up Visual C++ and run this code.

<br />
#include "stdafx.h"<br />
#include <conio.h><br />
#include <windows.h><br />
<br />
int main(int argc, char* argv[])<br />
{<br />
  printf("\nbool = %u",sizeof(bool));<br />
  printf("\nBOOL = %u",sizeof(BOOL));<br />
  getch();<br />
  return 0;<br />
}<br />

Bikram Singh

toxcct15-Jun-04 4:52

15-Jun-04 4:52

i have many more interesting things to do instead...
perhaps also you wanted to write <stdio.h> and <conio.h> ?? Unsure | :~

but, ok, that's an evidence Laugh | :laugh:

TOXCCT >>> GEII power

bikram singh15-Jun-04 5:02

bikram singh

15-Jun-04 5:02

yup, i did. first time i've posted a #include statement.
<conio.h>

Bikram Singh

David Crow15-Jun-04 5:04

David Crow

15-Jun-04 5:04

toxcct wrote:
perhaps also you wanted to write <stdio.h> and <conio.h> ??

They're there. Look closely!

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

toxcct15-Jun-04 5:06