conversion from LPVOID to char [260] - C / C++ / MFC Discussion Boards

Re: Differences between GetWindowRect and GetClientRect???

Parthi_Appu12-Mar-07 1:18

Parthi_Appu

12-Mar-07 1:18

siddharthsan wrote:
boundary of any control over the window???

Are you asking that GetCientRect(..) can be used to find the rect position of child control(windows) in the mail window??..

If so its not like that..
Simply you can put it like this....

GetClientRect(..) will give the window position and size with respect to itself (as stated earlier, always left and top values will be zero) and the right and bottom value will be equal as its width and height.

GetWindowRect(..) will give the window position with respect to screen area.

Say for example... your screen resolution 1024x768. You have a window whose upper left corner starts at the center of the screen and its width and height are 100 and 50 resp, then...

GetWindowRect(..) will return this - left = 512, top = 384, right = 612 and bottom = 434.

GetClientRect(..) will return this - left = 0, top = 0, reight = 100 and bottom = 50

Hope this will help...

Do your Duty and Don't expect the Result

Need Compression Alg to Zip and Unzip a text file

narayanagvs12-Mar-07 1:39

narayanagvs

12-Mar-07 1:39

Hi,

I need to Zip and Unzip a Text File. Pls suggest any Compression Algorithm
or any relevant links.

Thanks

Today is a gift, that's why it is called the present.

Re: Need Compression Alg to Zip and Unzip a text file

vibindia12-Mar-07 3:21

vibindia

12-Mar-07 3:21

Hi
U can give search "huffman" in ur msdn. Big Grin | :-D

VIBIN

"Fool's run away,where angle's fear to tread"

Re: Need Compression Alg to Zip and Unzip a text file

Mike Dimmick12-Mar-07 5:53

Mike Dimmick

12-Mar-07 5:53

The main algorithm for ZIP file compression is called 'Deflate' and is documented here[^]. Zlib[^] is a free implementation of the Deflate algorithm.

If you want to use the ZIP archive format as well, the libzip[^] library is often mentioned. I found it not particularly easy to use, so when coding something that needed to unzip a compressed archive, I used the ZIP file specification[^] and a few hints from the libzip source code for how to invoke the Inflate algorithm.

Stability. What an interesting concept. -- Chris Maunder

Re: Need Compression Alg to Zip and Unzip a text file

Hamid_RT12-Mar-07 5:56

Hamid_RT

12-Mar-07 5:56

See LiteZip and LiteUnzip
[^] if helpfuls

WhiteSky

Re: Need Compression Alg to Zip and Unzip a text file

narayanagvs12-Mar-07 20:58

narayanagvs

12-Mar-07 20:58

Good One.Very helpful to me.

Thanks

Today is a gift, that's why it is called the present.

Re: Need Compression Alg to Zip and Unzip a text file

Hamid_RT12-Mar-07 21:52

Hamid_RT

12-Mar-07 21:52

You're welcome Wink | ;)

WhiteSky

conversion from LPVOID to char [260]

neha.agarwal2712-Mar-07 1:31

neha.agarwal27

12-Mar-07 1:31

Hi all ,
I m using Worker thread in my application.
i am passing a char neha[260] value to my thread
and after passing it i again want to convert it from LPVOID to char neha[260]
can anybody tell me how to perform conversion.......
When i m writing
s8_Buf = *(static_cast<char*>(pParam));
Its Giving an error
error C2440: '=' : cannot convert from 'char' to 'char [260]'

can anybody help me in this....

Thanks in advance

Re: conversion from LPVOID to char [260]

_AnsHUMAN_ 12-Mar-07 1:49

_AnsHUMAN_

12-Mar-07 1:49

error C2440: '=' : cannot convert from 'char' to 'char [260]':

char *p=static_cast<char*>(pParam); // This should work
How are you declaring s8_Buf in your code?

_AnShUmAn_

Re: conversion from LPVOID to char [260]

vibindia12-Mar-07 4:25

vibindia

12-Mar-07 4:25

Hi
s8_Buf = *(static_cast(pParam));

char s8_Buf*; //Better Use TCHAR for MFC
s8_Buf = (char*)pParam; //Try to avoid this type of coding
or
s8_Buf = static_cast<char*>(pParam); //This will work fine
//IN the above statement insett less than symbol after static_cast then char* then greater than symbol ,next to that (pParam) follows....

VIBIN

"Fool's run away,where angle's fear to tread"

Dynamic Multidimentional Array?

MohammadAmiry12-Mar-07 1:11

MohammadAmiry

12-Mar-07 1:11

hi I need to have a 2D or 3D array in VC++, I use the following code:
<pre><code>
float** aa;
for(i=0;i<m;i++)
aa=new float* [m];
for(i=0;i<n;i++)
aa[i]=new float [n];
</code></pre>

to create an m*n matrix. But sometimes it throws Access Violation error.
I want to know if there is any better way to do this?

Re: Dynamic Multidimentional Array?

prasad_som12-Mar-07 1:22

prasad_som

12-Mar-07 1:22

Modify this to,

float** aa =new float*[m];//take this outside
for(int i=0;i < m;i++)
{
aa[i]=new float [n];
}

and while accessing it use this loop,

for (int i = 0 ; i < m;i++)
{
for (int j = 0 ; j < n; j++)
aa[i][j] = 0.0;
}
}

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: Dynamic Multidimentional Array?

ThatsAlok12-Mar-07 1:32

ThatsAlok

12-Mar-07 1:32

MohammadAmiry wrote:
I need to have a 2D or 3D array in VC++, I use the following code:

if you can use STL.. you can use vector of vector for multidimensional array! and it will manage it memory it self Smile | :)

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
Global Interface Table: An Easy Way to Marshal an Interface Pointer[new]
VC Forum Q&A :- I/ IV
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Re: Dynamic Multidimentional Array?

MohammadAmiry12-Mar-07 1:44

MohammadAmiry

12-Mar-07 1:44

Thanks a lot for your quick and helpful answers! Big Grin | :-D

Help!!!!!

Member 391312212-Mar-07 0:46

Member 3913122

12-Mar-07 0:46

Hi
I am really new to vc++ and i am havin a great trouble with the GUI part..
I need to create a diagram structure dynamically.I use a logic like create CButton objects dynamically and plot them on a window,then connect them using a CPaintDC object.

I use a thread(a static function) which wil invoke the function that creates the diagram. But whenever i call the function it creates the button line everything but afterthat it gets hanged...

Can anyone get me out of this hell??? Mad | :mad:

Plzzzzzzzzzzz.......... Cry | :((

Re: Help!!!!!

kakan12-Mar-07 0:59

kakan

12-Mar-07 0:59

A couple of breakpoints in the debugger would be a good start.

Alcohol. The cause of, and the solution to, all of life's problems - Homer Simpson

SetupDiEnumInterfaceDetail() is returning me same instanceID for two different devices

thushar12-Mar-07 0:26

thushar

12-Mar-07 0:26

I'm trying to find the drive letters allocated for USB devices.The flow i follow is,

I'm finding all logical drives connected to the system. from each dive letter i'm finding the device number. Then by enumerating thru all the devices belonging to GUID (GUID_DEVINTERFACE_DISK or VOLUME) i'm enumerating through all the devices that belongs to this class GUID.

The API's i'm using are

SetupDiGetClassDevs()

SetupDiEnumInterfaceDevice

SetupDiEnumInterfaceDetail() - (SP_DEVINFO_DATA structure returns the device instanceID ).

For Vista this flow is working fine. In XP this API's is returning the same instanceID for me for different devices(In some scenario).

Example : IF i connect a USB FDD and USB Memory key , for both the devices the

SP_DEVINFO_DATA structure returns me the same instanceID.

Please help me to find the problem.

Thanks in advance.

Best Regards,

Thushar

Button "Visible"

Ing.Raiz8212-Mar-07 0:17

Ing.Raiz82

12-Mar-07 0:17

Hi,

i have a CButton with the property "Visible false", which is the method for set visible this button???

Thanks

Regards

Raiz Roll eyes | :rolleyes:

Re: Button "Visible" [modified]

prasad_som12-Mar-07 0:26

prasad_som

12-Mar-07 0:26

Either add WS_VISIBLE style by using ModifyStyle,

ModifyStyle(WS_VISIBLE,0);should be ModifyStyle(0,WS_VISIBLE);</

or use ShowWindow(SW_SHOW);

-- modified at 7:36 Monday 12th March, 2007

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: Button "Visible"

ThatsAlok12-Mar-07 0:04

ThatsAlok

12-Mar-07 0:04

Ing.Raiz82 wrote:
have a CButton with the property "Visible false", which is the method for set visible this button???

ShowWindow()!

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
Global Interface Table: An Easy Way to Marshal an Interface Pointer[new]
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You

Re: Button "Visible"

Hamid_RT12-Mar-07 5:43

Hamid_RT

12-Mar-07 5:43

You can set visible to True on the property window of button Wink | ;)

WhiteSky

Re: Button "Visible"

Ing.Raiz8212-Mar-07 1:19

Ing.Raiz82

12-Mar-07 1:19

Thanks...

i'm stupid...ehhehehe

bye...

Re: Button "Visible"

Ing.Raiz8212-Mar-07 5:53

Ing.Raiz82

12-Mar-07 5:53

good idea....ehhehehe

raiz Laugh | :laugh:

Re: Button "Visible"

Hamid_RT12-Mar-07 6:46

Hamid_RT

12-Mar-07 6:46

Easy way;)

WhiteSky

how to change menu font of particular application,

Atul2311-Mar-07 23:52

Atul23

11-Mar-07 23:52

Hi
All
I want to change font of menu item of my application only in VC++6.0. When i change font of menu from control pannel then it change all menu fonts of OS. But i want to chnage the font of only myaplicatuion, how it can be done, please help me about this.

Regards
Sleepy | :zzz:

Atul Mahajan

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