some doubts about PeekMessage - C / C++ / MFC Discussion Boards

Suhail Yousaf27-Oct-03 23:57

27-Oct-03 23:57

I need to program UART in Visual C++ to acquire serial data from a hardware
device can some one please help me in this context...

Ever Welcome...

Re: programming UART in Visual C++...

Mike Dimmick28-Oct-03 1:40

Mike Dimmick

28-Oct-03 1:40

Search CodeProject for 'Serial' in the MFC/C++ category[^]. One of these articles should help.

Focus / Not Focused

YaronNir27-Oct-03 23:12

YaronNir

27-Oct-03 23:12

Hi all,

I have a dialog with the followings:

1) it is a modal dialog
2) it is always on top
3) it has no frame (style = popup, border = none)

my question is this, when the dialog has focus (which means i am clicking over it or moving my mouse over is) i want to do one thing, but when the focus leaves the dialog (click somewhere else, or move mouse somewhere else) i want to do something else.....

i tried to catch these messages and it didn't work properly:
1) WM_SETFOCUS/ WM_KILLFOCUS
2) WM_ACTIVATE / WM_ACTIVATE_APP

can any1 help me here?

thanks in advanced

Yaron

Re: Focus / Not Focused

Mumiozol28-Oct-03 0:03

Mumiozol

28-Oct-03 0:03

Try SetCapture to get mouse input even if it's outside of your dialog.
To act only once when mouse cursor leaves dialog area try to catch WM_MOUSELEAVE, WM_NCMOUSELEAVE.
Hope that's what you need.

Mickey Smile | :)

Re: Focus / Not Focused

YaronNir28-Oct-03 1:05

YaronNir

28-Oct-03 1:05

hi,

thanks for reply.

I don't know how to catch these messages, can you show me?

thanks

Yaron

Ask not what your application can do for you,
Ask what you can do for your application

Re: Focus / Not Focused

Mumiozol28-Oct-03 1:42

Mumiozol

28-Oct-03 1:42

In your derived class MESSAGE_MAP section

BEGIN_MESSAGE_MAP(CMyDialog, CDialog)
ON_MESSAGE(WM_MOUSELEAVE,OnMouseLeave)
END_MESSAGE_MAP()

Mickey Smile | :)

Re: Focus / Not Focused

YaronNir28-Oct-03 1:43

YaronNir

28-Oct-03 1:43

thanks

Ask not what your application can do for you,
Ask what you can do for your application

some doubts about PeekMessage

winewind27-Oct-03 22:05

winewind

27-Oct-03 22:05

I want to do some test about keyboard loging without using hook api. in the following codz, i hope when i press Esc key, the prog will com to an end. but it seems PeekMessage() will never work, always failed. How could it be? Thanks a lot.

#include "windows.h"
#include "stdio.h"

void main()
{
MSG msg;
char buffer[10];
int i, ch;

while(true)
{
if( PeekMessage( &msg,
NULL,
0,
0,
PM_REMOVE))
{
if( msg.message == WM_KEYDOWN && msg.wParam == VK_ESCAPE) break; //Esc pressed, then quit

printf( "Enter a line: " );

/* Read in single line from "stdin": */
for( i = 0; i < 9; i++ )
{
ch = getchar();
if(ch != '\n') buffer[i] = (char)ch;
}

/* Terminate string with null character: */
buffer[9] = '\0';
printf( "%s\n", buffer);
*buffer=NULL;
}
else
printf("peekmessage failed...\n");
Sleep(3000); //ensure there is enough time for keyboard operations
}
}

Re: some doubts about PeekMessage

yndfcd28-Oct-03 0:08

yndfcd

28-Oct-03 0:08

Console Applications don't recieve windows messages.

Re: some doubts about PeekMessage

winewind28-Oct-03 13:56

winewind

28-Oct-03 13:56

thank you so much. but can i use a keyboard or mouse hook api in console applications?

Re: some doubts about PeekMessage

yndfcd29-Oct-03 16:08

yndfcd

29-Oct-03 16:08

No.You can't do that either.

Re: some doubts about PeekMessage

winewind29-Oct-03 20:24

winewind

29-Oct-03 20:24

thank u so much^_^

CFileDialog

Kamesh27-Oct-03 21:08

Kamesh

27-Oct-03 21:08

In CFileDialog, How to make the EditControl which displays selectd file name, Read Only??
My problem is its accpeting a file name if user types file name rather than selecing.

Thanks in advance

path of my documents folder

r i s h a b h s27-Oct-03 20:59

r i s h a b h s

27-Oct-03 20:59

dear all,
how can i retrieve the path of My Documents folder for specific users (say guest) ? is there any function which returns the path.
my documents folder has different location in windows 9x and Xp........any way out?

rIsHaBh

Re: path of my documents folder

iceage27-Oct-03 21:14

iceage

27-Oct-03 21:14

 // Allocate a pointer to an Item ID list<br />
   LPITEMIDLIST pidl;<br />
<br />
   // Get a pointer to an item ID list that<br />
   // represents the path of a special folder<br />
   HRESULT hr = SHGetSpecialFolderLocation(NULL, /*CSIDL_SEARCH_MSDN*/, &pidl);<br />
<br />
   // Convert the item ID list's binary<br />
   // representation into a file system path<br />
   char szPath[_MAX_PATH];<br />
   SHGetPathFromIDList(pidl, szPath);<br />
<br />
   // Allocate a pointer to an IMalloc interface<br />
   LPMALLOC pMalloc;<br />
<br />
   // Get the address of our task allocator's IMalloc interface<br />
   hr = SHGetMalloc(&pMalloc);<br />
<br />
   // Free the item ID list allocated by SHGetSpecialFolderLocation<br />
   pMalloc->Free(pidl);<br />
<br />
   // Free our task allocator<br />
   pMalloc->Release();<br />
<br />
   // Work with the special folder's path (contained in szPath)<br />
   strcat(szPath , "\\Folder");

Re: path of my documents folder

Neville Franks27-Oct-03 22:15

Neville Franks

27-Oct-03 22:15

Or even simpler:

if ( SHGetSpecialFolderPath( NULL, pszMyDocFolder, CSIDL_PERSONAL, FALSE ) )
    return pszMyDocFolder;

or:

if( SUCCEEDED( SHGetFolderPath( NULL,
                                CSIDL_PERSONAL,  // same as CSIDL_MYDOCUMENTS. SHGetFolderPath() & CSIDL_MYDOCUMENTS needs latest SDK
                                NULL,
                                0,
                                pszMyDocFolder
                              )
             )
  )
{
    return pszMyDocFolder;
}

depending on which version of the SDK you have installed.

Neville Franks, Author of ED for Windows. Free Trial at www.getsoft.com

Re: path of my documents folder

r i s h a b h s28-Oct-03 18:31

r i s h a b h s

28-Oct-03 18:31

thnx a ton guyz!

rIsHaBh

How to get the current traffic bandwidth of computer?

George227-Oct-03 20:31

George2

27-Oct-03 20:31

Hello, everyone!

I want to get the current bandwidth (input and output respectively) of a Windows system, for example, 20.2kB for input and 30.1kB for output.

Where can I find some sample codes?

Thanks in advance,
Geo

Re: How to get the current traffic bandwidth of computer?

Mike Dimmick28-Oct-03 1:54

Mike Dimmick

28-Oct-03 1:54

For Windows NT-based systems, look at the Performance Data Helper API. You'll be interested in the Bytes Received/sec and Bytes Sent/sec counters on the Network Interface object, I think.

Re: How to get the current traffic bandwidth of computer?

George228-Oct-03 23:51

George2

28-Oct-03 23:51

Thanks, Mike buddy!

I have taken some time to read the API you introduced to me. They are really helpful. I am using the following source code to get in/out traffic bandwidth, but the output is always zero. Can you help?

Source Code:

----------
#include <windows.h>
#include <conio.h>
#include <stdio.h>
#include <pdh.h>
#include "iphlpapi.h"
#include "Iptypes.h"
#include "Iprtrmib.h"

#pragma comment(lib,"iphlpapi.lib")

int main (int argc, char** argv)
{
unsigned long pOutBufLen = sizeof (IP_ADAPTER_INFO);
IP_ADAPTER_INFO AdapterInfo;
memset (&AdapterInfo, 0, sizeof (IP_ADAPTER_INFO));
MIB_IFROW ifrow;
DWORD last_sent, last_recv, current_sent, current_recv;
DWORD diftime, dlwinspeed, upwinspeed, dw_refreshtime;

if( GetAdaptersInfo(&AdapterInfo, &pOutBufLen) != ERROR_SUCCESS ){
printf("Could not open default interface!");
return ( 0 );
}

ifrow.dwIndex = AdapterInfo.Index;
if( GetIfEntry( &ifrow ) != NO_ERROR ) {
printf("Could not open default interface!");
return ( 0 );
}

while (1)
{
current_sent = ifrow.dwOutOctets - last_sent;
current_recv = ifrow.dwInOctets - last_recv;
last_sent = ifrow.dwOutOctets;
last_recv = ifrow.dwInOctets;
printf ("Octs out: %ld\n", ifrow.dwOutOctets);
printf ("Octs in: %ld\n", ifrow.dwInOctets);
diftime=(GetTickCount()-dw_refreshtime);
dlwinspeed = current_recv/diftime;
upwinspeed = current_sent/diftime;
dw_refreshtime=GetTickCount();
printf ("Band in: %ld\n", dlwinspeed);
printf ("Band out: %ld\n", upwinspeed);
Sleep (5000);
}

return 0;
}
----------

Best regards,
Geo

mmc dialog windows

Colin Grealy27-Oct-03 20:06

Colin Grealy

27-Oct-03 20:06

Hi, I'm having trouble adding a dialog to my mmc snap-in.
the problem occus when I create a dialog in response to a menu command. while the dialog works fine if the menu command is from the context of a top-level scope item, the actual dialog is offset within it's own frame if it comes from a second level menu item.

any help would be much appreciated

problem cdatetimectrl in package?

murali_utr27-Oct-03 19:56

murali_utr

27-Oct-03 19:56

hi,
i using cdatetimectrl for registration form. for taking package need to add any dll for this control. i control not shown in the form. oninitdialog is failed i think this is due to the control. any one help to me.

thanks in advance.

Murali.M

Re: problem cdatetimectrl in package?

ananth_xyz27-Oct-03 22:09

ananth_xyz

27-Oct-03 22:09

Try using AfxOleInit()in the constructor of the dialog.

Re: problem cdatetimectrl in package?

murali_utr27-Oct-03 23:00

murali_utr

27-Oct-03 23:00

hi,
thanks for ur guide. actually my problem is after installing setup for the application and then the problem occurs. it's working fine on running source. i solved this problem. problem is mscomct2.ocx is not included while taking setup or package. after inserting the file. now working correctly.

once again thanks for guide.

Murali.M

How to get HMODULE/HINSTANCE handle of a different application?

kvcrajan27-Oct-03 18:45

kvcrajan

27-Oct-03 18:45

From a different application, I tried to get other application handle using "HINSTANCT hInst = GetWindowLong(hWnd, GWL_HINSTANCE);" which I am using in the function "HHOOK hHook = SetWindowsHookEx(WH_KEYBOARD, KeyboardProc, hInst, GetWindowThreadProcessId(hWnd, NULL));".

But the handle returned by "SetWindowsHookEx()" is NULL (because of 'hInst').

Could someone help me to resolve this problem by suggesting a alternate solution for this?

Thanks in Advance,
Rajarajan V.

Rajarajan Veerichetty.
IBM Software Labs,
Bangalore
Mobile: +91-0-9845443206

Last Visit: 31-Dec-99 18:00 Last Update: 13-Jun-24 10:57

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