Re: Need help regarding serial Communication Programming - C / C++ / MFC Discussion Boards

Re: Directshow VMR9 Filter

Mark Salsbery2-Jul-07 6:50

Mark Salsbery

2-Jul-07 6:50

Obtain a IVMRMixerControl9 interface to the VMR and use IVMRMixerControl9::SetMixingPrefs().

Mark

Mark Salsbery
Microsoft MVP - Visual C++

Need help regarding serial Communication Programming

yaminisridaran1-Jul-07 20:52

yaminisridaran

1-Jul-07 20:52

I have to check whether the CTS signal and RTS Signal in serial port. I have modified my
dcb.fOutxCtsFlow=TRUE;
dcb.fRtsControl=RTS_CONTROL_ENABLE;
I am placing a LED between pin7(RTS) and pin5 for GND to check whether voltage occurs in that pin7. But no voltage occurs.

S.Yamini

Re: Need help regarding serial Communication Programming

hameduser1-Jul-07 21:17

hameduser

1-Jul-07 21:17

what is your OS?
if your OS is windows XP/2003 or later , you can work with com/parallel port directly, because this ports close by Microsoft, you can use API for this work.

successful

Re: Need help regarding serial Communication Programming

yaminisridaran1-Jul-07 21:30

yaminisridaran

1-Jul-07 21:30

My OS is Windows Xp. Can u tell me which API I can use

S.Yamini

Re: Need help regarding serial Communication Programming

Hamid_RT1-Jul-07 21:21

Hamid_RT

1-Jul-07 21:21

See Serial library for C++[^] does helpful?

WhiteSky

Re: Need help regarding serial Communication Programming

normanS1-Jul-07 23:53

normanS

1-Jul-07 23:53

Please give more details.

I think you need to:
1. Open the serial port (CreateFile)
2. Get the state of the DCB (GetCommState)
3. Set dcb.fOutxCtsFlow and dcb.fRtsControl
4. Set the state of the DCB (SetCommState)

Are you doing all of these?

Re: Need help regarding serial Communication Programming

yaminisridaran2-Jul-07 0:15

yaminisridaran

2-Jul-07 0:15

I am sorry I have Placed my question wrong. I have to control a relay using serial port .The RTS and DTR should become high so that I control my relay.

S.Yamini

Re: Need help regarding serial Communication Programming

normanS2-Jul-07 3:07

normanS

2-Jul-07 3:07

I meant, we need more details about what you are doing in your program - a longer code section, maybe.

Once you set the parameters in the DCB, did you do:

SetCommState(hPort, &dcb);

Re: Need help regarding serial Communication Programming

yaminisridaran2-Jul-07 18:01

yaminisridaran

2-Jul-07 18:01

I am trying to control a relay via serial port using RTS and DTR pins in serial port . I have set these two pins high via VC++ coding or C. Can we suggest me something.

S.Yamini

Re: Need help regarding serial Communication Programming

normanS3-Jul-07 9:28

normanS

3-Jul-07 9:28

It's difficult to help if you don't show what you are doing already. Maybe you are missing a step in your program, so the lines are not actually going high. If you are setting the pins high, maybe they can not supply enough current to turn on a relay.

Instead of using the control lines, what about using lines on a parallel port? Have a look at this article www.codeproject.com/useritems/PaPiC.asp[^] - it uses the InpOut32 library, which allows direct access to I/O ports.

bcdedit in vista

saisp1-Jul-07 20:40

saisp

1-Jul-07 20:40

hi how to edit boot configuration in vista using bcdedit.exe in mfc program. pls help me . its urgent

how to make my rich edit ctrl scroll automatically when insert new text?

awah1-Jul-07 20:32

awah

1-Jul-07 20:32

how to make my rich edit ctrl scroll automatically when insert new text?

here's how i insert text

<br />
	msg.Insert( msg.GetLength() , "\n");<br />
	m_system_message.SetSel(-1,-1);<br />
	m_system_message.ReplaceSel(msg);

here's how the richedit is defined in the resource file

CONTROL         "",IDC_SYSTEM_MESSAGE,"RICHEDIT",ES_MULTILINE | <br />
                 ES_AUTOVSCROLL | WS_BORDER | WS_VSCROLL | WS_TABSTOP,11,<br />
                 257,241,52

as you guys can see, ES_AUTOVSCROLL is definately there
but whenever i insert new text using ReplaceSel, the text focus is always at the top. how do i make it such that it automatically scrolls down to read the latest text inserted?

using
- mfc
- vc6.0
- winxp

thanks in advance!

Re: how to make my rich edit ctrl scroll automatically when insert new text?

Hamid_RT1-Jul-07 21:30

Hamid_RT

1-Jul-07 21:30

Im not sure see A Rich Edit Control That Displays Bitmaps and Other OLE Objects[^] does helpful?

WhiteSky

Re: how to make my rich edit ctrl scroll automatically when insert new text?

khan++2-Jul-07 0:13

khan++

2-Jul-07 0:13

I think ES_AUTOVSCROLL is there to help scroll the window when the user inputs text using the keyboard etc. But for automatic additions to the control, I think you could send it a message to scroll itself after adding text to it.

//Add text to it here.<br />
m_system_message.SendMessage(WM_VSCROLL,MAKEWPARAM(SB_BOTTOM,0));

Then it should scroll to the bottom, and the cursor, if in it, should appear at the end of the last line.

this is this.

Can we find address of a winAPI without using GetProcAddress?

GNUlihd1-Jul-07 19:53

GNUlihd

1-Jul-07 19:53

Hi,

Can we get the address of a winAPI (from Advapi32.dll) without using GetProcAddress or IAT scan? Is it possible?
Basically, I want to obfuscate the api call in source code level.

Thanks,

GNU:lihd

Re: Can we find address of a winAPI without using GetProcAddress?

Hamid_RT1-Jul-07 21:18

Hamid_RT

1-Jul-07 21:18

But why you dont want to use GetProcAddress?

WhiteSky

Re: Can we find address of a winAPI without using GetProcAddress?

GNUlihd1-Jul-07 22:59

GNUlihd

1-Jul-07 22:59

to obfuscate the api call in source code level.

If i can find the procAddress then i will obfuscate using assembly call and api redirections so that it would be harder to find out which API is being called (looking at the source).

Re: Can we find address of a winAPI without using GetProcAddress?

Stephen Hewitt1-Jul-07 21:30

Stephen Hewitt

1-Jul-07 21:30

Yes. This code should point you in the right direction. It outputs the names of all the functions exported by name from "Kernel32.dll":

// Console.cpp : Defines the entry point for the console application.
//
 
#include "stdafx.h"
#include <iostream>
#include <windows.h>
 
LPVOID PrintFunctions(HMODULE hMod)
{
	// Find the DOS header.
	PIMAGE_DOS_HEADER pDOS = (PIMAGE_DOS_HEADER)hMod;
 
	// Find the address of the "new" header.
	PIMAGE_NT_HEADERS pNew = (PIMAGE_NT_HEADERS)((char*)pDOS+pDOS->e_lfanew);
 
	// Find the address of the "optional" header.
	PIMAGE_OPTIONAL_HEADER pOpt = &(pNew->OptionalHeader);
 
	// Now find the export table.
	PIMAGE_EXPORT_DIRECTORY pExport =
		(PIMAGE_EXPORT_DIRECTORY)((char*)pDOS+pOpt->DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress);
 
	// Write out all the exported names.
	UINT_PTR *pNameArray = (UINT_PTR*)((char*)pDOS+pExport->AddressOfNames);
	for (DWORD i=0; i<pExport->NumberOfNames; ++i)
	{
		LPCSTR pName = (LPCSTR)((char*)pDOS+pNameArray[i]);
		std::cout << pName << std::endl;
	}
 
	return NULL;
}
 
int main(int arvc, char* argv[])
{
	HMODULE hMod = GetModuleHandle("kernel32.dll");
	PrintFunctions(hMod);
 
	return 0;
}

Steve

Re: Can we find address of a winAPI without using GetProcAddress?

tom groezer2-Jul-07 9:36

tom groezer

2-Jul-07 9:36

Hi,
Where I could learn this kind of learning. Please point me to the right guides to do kernel/system programming?

Re: Can we find address of a winAPI without using GetProcAddress?

Stephen Hewitt2-Jul-07 13:08

Stephen Hewitt

2-Jul-07 13:08

To learn to understand the code I posted try these resources:
- Microsoft Portable Executable and Common Object File Format Specification[^]
- And this Google search[^].

Steve

MTS Funtion

tasumisra1-Jul-07 19:51

tasumisra

1-Jul-07 19:51

Dear all,
What is the MTS funtion and what is the advantage of using MTS Funtion....

Thanks in advance

vikas da

vikas da

What is the size of bitArray ? and how can i define array that each Cell is one bit ?

Yanshof1-Jul-07 19:10

Yanshof

1-Jul-07 19:10

Hi All,

I need to define some array that will hold one bit in each cell.
I want to do it with BitArray - but i don't find in any place the size of each cell in this array.
Someone know the size of elements in bitArray ?
How can i define array that each element is only one bit ?

Thanks for any help.

Re: What is the size of bitArray ? and how can i define array that each Cell is one bit ?

CPallini2-Jul-07 20:35

CPallini

2-Jul-07 20:35

Yanshof wrote:
I want to do it with BitArray

This is a .NET class. Either this is not the right forum or it is the wrong type (have a look to std::bitset, std::vector< bool > classes).

Yanshof wrote:
but i don't find in any place the size of each cell in this array.
Someone know the size of elements in bitArray ?

Why do yoou need the above?

How can i define array that each element is only one bit ?

see std::bitset, and std::vector< bool > documentation.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

selected list item of another dialog

rp_suman1-Jul-07 18:52

rp_suman

1-Jul-07 18:52

I want to display a separate dialog with list control when pushing a button in main dialog,
and to get the selected list item text when the dialog is closed.
My code is as follows:
In main dialog button click:

<br />
	NewDlg obj= new NewDlg();<br />
	obj.DoModal();<br />

In the dialog class constructor:

CListBox *pList;<br />
pList = (CListBox*)GetDlgItem(IDC_LIST1);<br />
pList->AddString("1");<br />
pList->AddString("2");<br />

An error saying "Debug assertion failed" is coming at AddString().
Any help would be greatly appreciable.
Best Regards,
Suman

Re: selected list item of another dialog

Hamid_RT1-Jul-07 19:24

Hamid_RT

1-Jul-07 19:24

Maybe you can use of this code:

CMain* m_main=(CMain*)GetParent();
m_main->yourcontrol

if we suppose CMain is your class.

WhiteSky

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