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Anonymous wrote:
How can can I obtain a handle to some window only by using its handle
HWND hWnd = 0x000004C8;
MSN Messenger.
prakashnadar@msn.com
Tip of the day of visual C++ IDE.
"We use it before you do! Visual C++ was developed using Visual C++"
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Excuse me, I meant a pointer to its window:
CWnd *pWnd = ...
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pWnd->m_hWnd; gives you the handle of the window.
MSN Messenger.
prakashnadar@msn.com
Tip of the day of visual C++ IDE.
"We use it before you do! Visual C++ was developed using Visual C++"
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You can use CWnd::Attach() to attach a window handle HWND to a CWnd object.
Ant.
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Is it possible to map a CComboBox control to a CString data type? I'm looking in the class wizard, but it only gives int as a possible value so I just want to double check. Thanks.
- Aaron
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int is a verymuch a logical thing to get, coz you can then get corresponding string,and other values from it.
MSN Messenger.
prakashnadar@msn.com
Tip of the day of visual C++ IDE.
"We use it before you do! Visual C++ was developed using Visual C++"
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sry to post this 2x but i figured some ppl wouldnt see it in my other thread.
i get this error:
cannot convert parameter 1 from 'unsigned int' to 'const char *'
Conversion from int type to pointer type requires reinterpret_cast, C-style cast or functions-style cast
for this line of code:
m_port.AddString(ports.ElementAt(i));
How can i fix this?
Thank you
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And Like The Wind Our Hero Vanishes Off Into The Distance...
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It seems that ports.ElementAt if of type unsigned int (number) and must be of type const char * (string).
Could you provide the ports structure/class declaration/initialization?
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im usinng the stuff the guy gave me in this thread:
Can someone help me with this com port enumarator:
http://www.codeproject.com/script/comments/forums.asp?forumid=1647&df=100&select=776802#xx776802xx
if the link doesnt work it is just a few posts past this one. im using what he gave me not the link i porvided in the origional message
thank you
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And Like The Wind Our Hero Vanishes Off Into The Distance...
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Ok.
The code in the thread is:
tprintf(_T("COM%d\n"), ports.ElementAt(i));
then, port.ElementAt(i) is a number.
You have to modify your code in the following way (or similar):
char txt[256];
sprintf(txt,"COM%d",ports.ElementAt(i));
m_port.AddString(txt);
Regards
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I need to store the handle of my dialog so that I can pass it to my plug-ins so that they can pass messages back to the calling application. I am doing the following in OnInitDialog(). Will this cause any problems or is this method okay?
BOOL CHTPCCOREDlg::OnInitDialog()
{
...
HWND hMainWindow = AfxGetApp()->m_pMainWnd->GetSafeHwnd();
...
}
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It is safe as long the main window is not recreated.
--
Ich bin der böse Mann von Schweden.
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To use all afx functions do you need MFC linked applications?
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yes
a two cent stamp short of going postal.
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ok, im using this com port enumarator:
http://www.codeproject.com/system/listports.asp
and im haveing trouble using it to list the ports in a list box using MFC. Can someone send me a simple example doing that with this, using VC++ 6 preferably?
thank you, This stupid thing is frustrating me beyond belief lol
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And Like The Wind Our Hero Vanishes Off Into The Distance...
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In stdafx.h put:
#include <afxext.h>
#include <afxtempl.h>
In EnumerSer.h put:
#ifndef __AFXTEMPL_H__
#pragma message("EnumerateSerialPorts function requires afxtempl.h in your PCH")
#endif
void EnumerateSerialPorts(CUIntArray& ports);
...
Demo.cpp:
#include "stdafx.h"
#include <stdio.h>
#include "EnumerSer.h"
void main()
{
CUIntArray ports;
EnumerateSerialPorts(ports);
_tprintf(_T("The following serial ports are installed on this machine\n"));
for (int i=0; i
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Sorry I forget:
///////////////////////////// Implementation //////////////////////////////////
void EnumerateSerialPorts(CUIntArray& ports)
{
//Make sure we clear out any elements which may already be in the array
ports.RemoveAll();
//Determine what OS we are running on
OSVERSIONINFO osvi;
osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
BOOL bGetVer = GetVersionEx(&osvi);
//On NT use the QueryDosDevice API
if (bGetVer && (osvi.dwPlatformId == VER_PLATFORM_WIN32_NT))
{
//Use QueryDosDevice to look for all devices of the form COMx. This is a better
//solution as it means that no ports have to be opened at all.
TCHAR szDevices[65535];
DWORD dwChars = QueryDosDevice(NULL, szDevices, 65535);
if (dwChars)
{
int i=0;
for (;;)
{
//Get the current device name
TCHAR* pszCurrentDevice = &szDevices[i];
//If it looks like "COMX" then
//add it to the array which will be returned
int nLen = _tcslen(pszCurrentDevice);
if (nLen > 3 && _tcsnicmp(pszCurrentDevice, _T("COM"), 3) == 0)
{
//Work out the port number
int nPort = _ttoi(&pszCurrentDevice[3]);
ports.Add(nPort);
}
// Go to next NULL character
while(szDevices[i] != _T('\0'))
i++;
// Bump pointer to the next string
i++;
// The list is double-NULL terminated, so if the character is
// now NULL, we're at the end
if (szDevices[i] == _T('\0'))
break;
}
}
else
TRACE(_T("Failed in call to QueryDosDevice, GetLastError:%d\n"), GetLastError());
}
else
{
//On 95/98 open up each port to determine their existence
//Up to 255 COM ports are supported so we iterate through all of them seeing
//if we can open them or if we fail to open them, get an access denied or general error error.
//Both of these cases indicate that there is a COM port at that number.
for (UINT i=1; i<256; i++)
{
//Form the Raw device name
CString sPort;
sPort.Format(_T("\\\\.\\COM%d"), i);
//Try to open the port
BOOL bSuccess = FALSE;
HANDLE hPort = ::CreateFile(sPort, GENERIC_READ | GENERIC_WRITE, 0, 0, OPEN_EXISTING, 0, 0);
if (hPort == INVALID_HANDLE_VALUE)
{
DWORD dwError = GetLastError();
//Check to see if the error was because some other app had the port open or a general failure
if (dwError == ERROR_ACCESS_DENIED || dwError == ERROR_GEN_FAILURE)
bSuccess = TRUE;
}
else
{
//The port was opened successfully
bSuccess = TRUE;
//Don't forget to close the port, since we are going to do nothing with it anyway
CloseHandle(hPort);
}
//Add the port number to the array which will be returned
if (bSuccess)
ports.Add(i);
}
}
}
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umm u have a few includes there with nothing after them, what do i include?
ty
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And Like The Wind Our Hero Vanishes Off Into The Distance...
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Sorry I did not check "Do not treat <'s as HTML tags."
In Stdafx.h should be:
#include <afxext.h>
#include <afxtempl.h>
In Demo.cpp missed
#include <stdio.h>
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im about to shove a stick of dynomite into my comps serial port, lol
i get this error:
cannot convert parameter 1 from 'unsigned int' to 'const char *'
for this line of code:
m_port.AddString(ports.ElementAt(i));
how do i fix that?
thank you
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You have to convert this integer into string such as:
char str[7];
sprintf(str, "COM%d", ports.ElementAt(i));
m_port.AddString(str);
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Being only a beginner, I have a very basic question to ask:
to input names, what is the best to use: strings or char format?
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Char can store only one charecter.
String can store any number of charecters.
So as name contain multi chars, use Strings.
Regards,
Jijo. 
________________________________
Yesterday is history,
Tomorrow is a mystery,
But today is a present.
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When I try to spawn a thread i get an error. Here is my code:
DWORD dwThreadId, dwThrdParam = 1;
HANDLE hThread;
char szMsg[80];
hThread = CreateThread(
NULL, // default security attributes
0, // use default stack size
cliThread, // thread function
&_param, // argument to thread function
0, // use default creation flags
&dwThreadId); // returns the thread identifier
// Check the return value for success.
if (hThread == NULL)
{
wsprintf( szMsg, "CreateThread failed." );
MessageBox( NULL, szMsg, "main", MB_OK );
}
else
{
}
The error was that the memory couldnt be read. Is there a quick solution to my problems? Thanks
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