C / C++ / MFC

6-Jan-09 21:04

You first need to get access to the HTML source that has currently been loaded.
This differs from browser to browser.
In IE you can write a BHO.
In Mozilla based browsers you can like Firefox and Netscape you can write an extension.

Then you can use HTMLDOM/Javascript/XPComm to access all the IMG tags to fetch the images.

«_Superman_»

Re: load image

David Crow7-Jan-09 3:12

David Crow

7-Jan-09 3:12

If you know the URL of the image, try URLDownloadToFile().

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

How to call a Dll

tasumisra6-Jan-09 18:53

tasumisra

6-Jan-09 18:53

i want to know how to call a DLL

and what is the difference between both

1.cocreate

2.Import dll

Thank you...

vikas da

Cedric Moonen6-Jan-09 20:14

Cedric Moonen

6-Jan-09 20:14

tasumisra wrote:
i want to know how to call a DLL

You don't call a dll. You first load the dll and when this is succesfull you can retrieve the addresses of functions in the dll and call those functions.

Cédric Moonen
Software developer

Charting control [v1.5]
OpenGL game tutorial in C++

Hamid_RT6-Jan-09 20:19

Hamid_RT

6-Jan-09 20:19

Call no load yes.
How to load a dynamic link library (DLL) into a Microsoft Visual C++ 6.0 project[^]
And see
Step by Step: Calling C++ DLLs from VC++ and VB - Part 4[^]( Hans explains for you four parts for dlls.) Wink | ;)

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

CPallini6-Jan-09 21:57

CPallini

6-Jan-09 21:57

tasumisra wrote:
1.cocreate

Do you mean CoCreateInstance [^]?

BTW: What about DLL's documentation [^]?

Smile | :)

nyeboy7-Jan-09 21:16

nyeboy

7-Jan-09 21:16

There are two methods generally.
One:Dynamic load DLL
HINSTANCE hInst;
//DLL2.dll must in current directory.
//Implement on a button clicked event.
hInst=LoadLibrary("DLL2.dll");
typedef int (*ADDPROC) (int a,int b);
ADDPROC add=(ADDPROC)GetProcAddress(hInst,"Add");
if(!add)
{
MessageBox("Failed to get address！");
return;
}

int ret=add(5,3);
CString str;
str.Format("%d",ret);
MessageBox(str);
Two:Static load DLL
First place DLL2.dll and DLL2.lib into current directory,
then set project/settings/Link to load DLL2.lib
_declspec(dllimport) int add(int a,int b);
void CDLL2TestDlg::OnButton1()
{
int a=add(5,5);//use this method from dll
}

studing is processing in this life.

struct definition with :

KASR16-Jan-09 18:20

KASR1

6-Jan-09 18:20

what does the declaration (:8, :3, :1, etc.,) mean in the folowing struct?

struct CELL {   // Declare CELL bit field
   unsigned short character  : 8;  // 00000000 ????????
   unsigned short foreground : 3;  // 00000??? 00000000
   unsigned short intensity  : 1;  // 0000?000 00000000
   unsigned short background : 3;  // 0???0000 00000000
   unsigned short blink      : 1;  // ?0000000 00000000
} screen[25][80];       // Array of bit fields <pre>

«_Superman_»6-Jan-09 18:48

6-Jan-09 18:48

character is an unsigned short value but will occupy only 8 bits and not 2 bytes.
foreground is an unsigned short value but will occupy only 3 bits and not 2 bytes.

Similarly other fields of the structure.

For example if valid values for intensity are only 0 and 1, you only need 1 bit to represent that.
That is the idea here.

«_Superman_»

Re: struct definition with : [modified]

KASR16-Jan-09 19:09

KASR1

6-Jan-09 19:09

Thanks for your reply.
In case the size exceeds the predefined size what will happen?

«_Superman_»6-Jan-09 19:15

6-Jan-09 19:15

If value cannot fit into the number of bits allocated, it will then overflow to the next field.
It is up to the application to limit that.

«_Superman_»

modified on Wednesday, January 7, 2009 3:11 AM

Stuart Dootson7-Jan-09 1:42

Stuart Dootson

7-Jan-09 1:42

Superman's answer is incorrect - the behaviour on assignment of a value that cannot be held in the bit-field is implementation (i.e. compiler) dependent - that's what the C++ Standard says (section 4.7p3), anyway, and I suspect the C standard will be much the same.

Certainly, for Microsoft C/C++, values are truncated to what will fit in the bit-field. Consider this code:

#include <stdio.h>

struct X
{
   unsigned int a : 3;
   unsigned int b : 3;
};

int main(int argc, char** argv)
{
   {
      struct X x = {0};
      x.a = 15;
      printf("x.a = %d, x.b = %d\n", (int)x.a, (int)x.b);
   }
   {
      struct X x = {0};
      x.b = 15;
      printf("x.a = %d, x.b = %d\n", (int)x.a, (int)x.b);
   }
   return 0;
}

This produces the following output when compiled as C or C++:

x.a = 7, x.b = 0
x.a = 0, x.b = 7

Randor 6-Jan-09 19:26

Randor

6-Jan-09 19:26

Those are Bit Fields[^]

Best Wishes,
-David Delaune

How to read unicode text files

John R. Shaw7-Jan-09 6:32

John R. Shaw

7-Jan-09 6:32

KASR1 wrote:
what does the declaration (:8, :3, :1, etc.,) mean in the folowing struct?

They are the number of bits assigned to each field. The author wanted to store the data in 2 bytes (unsigned short) and specify names for each set of bits within those bytes. This is normally considered non-portable (but legal) C-Code. There are other more portatable ways of doing the same thing, but they require a little more work by the programmer.

Note that they defined exactly 16-bits; if they had specified just one more bit, it would changed the memory block size to 32-bits (unsigned int = 4 bytes on 32-bit compilers) unless some compiler specific flag was set to compact it to single by boundries.

INTP
"Program testing can be used to show the presence of bugs, but never to show their absence."Edsger Dijkstra

PS@Codeproj6-Jan-09 17:39

PS@Codeproj

6-Jan-09 17:39

How to read unicode text files (japanese chars) in C prog?

Re: How to read unicode text files

«_Superman_»6-Jan-09 17:51