C / C++ / MFC Discussion Boards

peshkunta1-Jan-06 18:55

1-Jan-06 18:55

I would like to use Win API's SendMessage( wnd, WM_GETTEXTLENGTH, 0, 0 );, or PostMessage function to be able to get the text from the textbox of another program. Let's say, I would like to be able to get the text from Instant Messenger and show it in my App. Does anyone know how to do this!

I'm doing it in C#, but I'm posting here because those functions are not C# native and you are more familiar with them than C# programmers.

Re: (((((((How do I send a message!))))))

vishalmore1-Jan-06 19:39

vishalmore

1-Jan-06 19:39

Hi peshkunta,

You want to retrieve the text from the text box of some Instant messenger?
What all you require are
1. HWND of -- IM
2. Class name for text box (most of cases it's "Edit")

The API's you would require are...
1. EnumWindows:
-Pass IM HWND as 1 param, and give your (own) callback function name as
second param to this API.
-Loop through the text boxes inside IM (if more text boxes exists).
-When ever you get the text box from where you want to retrive the text
return TRUE from callback to terminate the enumeration. (one possible
approach to compare the text boxes is compare class name)
-EnumWindows must return you the HWND to (desired) text box.
2. PostMessage
-Use PostMessage to get the text from the text box.

Pseudo code is done... now get in action to retrive the text !

all the very best !

Cheers,
Vishal

Re: (((((((How do I send a message!))))))

peshkunta1-Jan-06 22:53

peshkunta

1-Jan-06 22:53

Thanks so much for the response! I'm not very familiar with C++ functions. I know that SendMessage or PostMessage have many versions (all accept different parameters), but I have no experience in using them.

I know how to get the handle of a window/dialog (HWND), and pass the message constant WM_CLOSE, etc., but I'm not sure how to get the class of a text box, hence don't know how to loop through them. Is EnumWindows a function? And how do I use it? That below is what I think I'm most iffy about:

******************************************************************
-Loop through the text boxes inside IM (if more text boxes exists).
-When ever you get the text box from where you want to retrive the text
return TRUE from callback to terminate the enumeration. (one possible
approach to compare the text boxes is compare class name)
-EnumWindows must return you the HWND to (desired) text box.
******************************************************************

Could you please write me an example on how I would do that? THANKS!!

how to open com port

birajendu1-Jan-06 18:31

birajendu

1-Jan-06 18:31

I am using Window CE emulator as a CPU choice to debug my eVC++ program.Can i able to open my PC's com port thrugh this emulator option.I am running this emulator in Window XP environment.

birajendu
CyberG India
Delhi
India

Re: how to open com port

includeh101-Jan-06 21:03

includeh10

1-Jan-06 21:03

there is an example in VC samples, you can have a look.
open com port is by function CreateFile(...)

includeh10

Re: how to open com port

birajendu1-Jan-06 21:17

birajendu

1-Jan-06 21:17

ya...

I had tried CreateFile() function.I had not find any problem wen i ran my eVC++ code in window CE.Net board.

But my problem is I am tring to open the com port of my pc by a program written in eVC++ by building that program through Window CE Emulator.My pc has windows XP as current OS.

thanx in advance

birajendu
CyberG India
Delhi
India

The best way to get the keystrokes in ASCII form

INA_ctive1-Jan-06 15:22

INA_ctive

1-Jan-06 15:22

I'm using Windows API. Usually i use the GetKeyNameText function, but i found that i'm not satisfied with it since it returns all upper case ascii, it return special character such as the enter and space as ascii "Enter" and "Space". Do you have recommendation about more suitable function or maybe a way to solve this (if there isn't any function like that)
thank you very much =)

Re: The best way to get the keystrokes in ASCII form

Owner drawn1-Jan-06 17:31

Owner drawn

1-Jan-06 17:31

Did you try

int ToAscii(UINT uVirtKey,
    UINT uScanCode,
    PBYTE lpKeyState,
    LPWORD lpChar,
    UINT uFlags
);

Jesus Loves You and Me Smile | :)

<marquee direction="up" height="50" scrolldelay="1" step="1" scrollamount="1" style="background-color:'#44ccff'">
--Owner Drawn
--Nothing special
--Defeat is temporary but surrender is permanent
--Never say quits
--Jesus is Lord

Re: The best way to get the keystrokes in ASCII form

vishalmore1-Jan-06 19:43

vishalmore

1-Jan-06 19:43

Have you tried --- "GetAsyncKeyState" ?

Cheers,
Vishal

Re: The best way to get the keystrokes in ASCII form

Owner drawn1-Jan-06 20:19

Owner drawn

1-Jan-06 20:19

The GetAsyncKeyState function determines whether a key is up or down at the time the function is called, and whether the key was pressed after a previous call to GetAsyncKeyState.

Jesus Loves You and Me Smile | :)

Re: The best way to get the keystrokes in ASCII form

INA_ctive2-Jan-06 5:27

INA_ctive

2-Jan-06 5:27

thank you, i tried the ToAscii function but got stuck: how can i supply the first and the second parameters? i only have access to wParam and lParam of the messages.

thank you.

CopyTo method in Class String

zpeng1-Jan-06 11:12

zpeng

1-Jan-06 11:12

There is method called CopyTo(src_start,dst,dst_start, length) in class String (VS ++ .Net 2003) Big Grin | :-D

. While dst is a Char or __wchar_t array. What will be the best way to Copy part of First String to another String? For example, String *Str=S"dirName/filename", I would like just take the file name so I start copy from 8 from Str to another Char dst[]. But dst is not String instance.

Any better ideal? Thanks

communication between and Bi directional communication between VC and C

sheshidar1-Jan-06 10:21

sheshidar

1-Jan-06 10:21

Hi,
How to make bi directional microcontroller program(keil,like c).

Re: communication between and Bi directional communication between VC and C

Prakash Nadar1-Jan-06 17:45

Prakash Nadar

1-Jan-06 17:45

What do you want to be bidirectional?

-Prakash

communication between VC and C

sheshidar1-Jan-06 22:45

sheshidar

1-Jan-06 22:45

Hi,
in my project i have to develop a GUI to control
configuration of a microcontroller. I developed GUI
using VC++6.0 and microcontroller programs in Keil.
These both programs will run on same pc, and now i
have to make communication beween these both programs.
If anyone have any idea kindly advice me .
Thanking you
with regards
sheshidar patnam

Re: communication between VC and C

Prakash Nadar1-Jan-06 23:54

Prakash Nadar

1-Jan-06 23:54

The application that you have developed and compiled in kiel, does it work in some emulator or a standalone application.

-Prakash

Brush and Window Color ...

Hadi Rezaee1-Jan-06 4:42

Hadi Rezaee

1-Jan-06 4:42

Hi there,

How can i make a Brush with default window color ?!

I just tried below code, but it doesn't work Frown | :(

:

HBRUSH hBrush = ::GetSysColorBrush( COLOR_WINDOW );

When i use below code to make the brush (with XP default window color), it just works fine (as u see, the i passed the color HANDY (!!), i'm looking for code that make that automatically. ) Confused | :confused:

:

HBRUSH hBrush = CreateSolidBrush( RGB( 236, 233, 210 ) );

I want to use the brush for painting a Static Control (Custom control) background ... (in CtlColor function, ON_WM_CTLCOLOR_REFLECT() msg)

Please help Smile | :)

Regards,
Hadi

Re: Brush and Window Color ...

Hadi Rezaee1-Jan-06 5:12

Hadi Rezaee

1-Jan-06 5:12

YESSS !
The problem has been solved Smile | :)

ROCK ON !!! Cool | :cool:

Regards,
Hadi

Re: Brush and Window Color ...

John R. Shaw1-Jan-06 9:08

John R. Shaw

1-Jan-06 9:08

Now thats what I call a good answer!

INTP
Every thing is relative...

IP Address

mehrdadov1-Jan-06 1:10

mehrdadov

1-Jan-06 1:10

I want to get my Computer IP.How can I do it?

Agh

Re: IP Address

includeh101-Jan-06 1:15

includeh10

1-Jan-06 1:15

go to www.whatismyipaddress.com to see it at once.

includeh10

Re: IP Address

Prakash Nadar1-Jan-06 4:21

Prakash Nadar

1-Jan-06 4:21

includeh10 wrote:
go to www.whatismyipaddress.com to see it at once.

This will give you the public ip if you are behind a proxy.

-Prakash

Re: IP Address

Jörgen Sigvardsson1-Jan-06 10:08

Jörgen Sigvardsson

1-Jan-06 10:08

He posted his question in the Visual C++ forum.

--
Pictures[^] from my Japan trip.

-- modified at 16:09 Sunday 1st January, 2006

Re: IP Address

Gavin Taylor1-Jan-06 6:10

Gavin Taylor

1-Jan-06 6:10

The best way to grab a list of all the ip addresses attached to your local system is using the IPHelper[^] library. You'll need to include the IPHlpApi.h and winsock2.h header files, then add iphlpapi.lib and ws2_32.lib to your list of import libraries.

MIB_IPADDRTABLE  *pIPAddrTable = NULL;
DWORD            dwSize = 0;
DWORD            dwRetVal = 0;
	
if (GetIpAddrTable(pIPAddrTable, &dwSize, 0) != ERROR_INSUFFICIENT_BUFFER )
{
	printf( "Error getting buffer size." );
}
else
{
	pIPAddrTable = ( MIB_IPADDRTABLE * ) malloc ( dwSize );
	
	if ( (dwRetVal = GetIpAddrTable( pIPAddrTable, & dwSize, 0 ) ) != NO_ERROR )
	{
		printf("GetIpAddrTable failed.\n");
	}
	
	for( int i = 0; i < pIPAddrTable->dwNumEntries; i ++ )
	{
		in_addr add;
		in_addr subnet;
	
		ZeroMemory( & add, sizeof( in_addr ) );
		ZeroMemory( & subnet, sizeof( in_addr ) );
		add.S_un.S_addr = pIPAddrTable->table[ i ].dwAddr;
		subnet.S_un.S_addr = pIPAddrTable->table[i].dwMask;
	
		printf("IP Address:         %s\n", inet_ntoa( add ) );
		printf("IP Mask:            %s\n\n", inet_ntoa( subnet ) );
	}
	
	free( pIPAddrTable );
}

Gavin Taylor
w: http://www.gavspace.com

-- modified at 12:11 Sunday 1st January, 2006

Re: IP Address

Jetli Jerry1-Jan-06 18:05

Jetli Jerry

1-Jan-06 18:05

Hi,

This works for me,

        CString                 sLocalIp;<br />
	HOSTENT			*hs			= NULL;<br />
	UCHAR			ch[4]		= {0};<br />
	CHAR			szHostName[50]={0};<br />
<br />
	// get name of machine<br />
	if ( SOCKET_ERROR == ::gethostname((LPSTR)(LPCTSTR)szHostName, 50) )<br />
	{<br />
		return GetLastError();<br />
	}<br />
<br />
<br />
	hs = gethostbyname((LPSTR)(LPCTSTR)szHostName); <br />
<br />
	if ( hs == NULL )<br />
	{<br />
		return GetLastError();<br />
	}<br />
<br />
<br />
	// h_addr contains ip address<br />
	memcpy(ch, hs->h_addr,4); <br />
<br />
	// form string		<br />
	sLocalIp.Format("%d.%d.%d.%d", ch[0], ch[1], ch[2], ch[3]);

Hope this is also correct method.(((??)))

Jetli
Constant Thing In World Is Change.

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