Re: Open other Application From Dialogue - C / C++ / MFC Discussion Boards

camuoi28817-May-11 22:59

17-May-11 22:59

I have a Dialogue and a Button "Open".I want when i click on "Open" Button,an other application will open.I know MFC guide to use CreatProcess Function but i don't know how to add this function into "Open" Clicked event. Frown | :(

Please help me.
Example i have:

void CThunghiemDlg::OnButtonOpen() 
{
	// TODO: Add your control notification handler code here
	
}

Re: Open other Application From Dialogue

Richard MacCutchan17-May-11 23:22

Richard MacCutchan

17-May-11 23:22

I think the above comment makes it fairly clear what you need to do. Just add the code to run the external application. Or have I misunderstood your question?

The best things in life are not things.

Re: Open other Application From Dialogue

camuoi28817-May-11 23:48

camuoi288

17-May-11 23:48

My question is how to call a application (example FireFox.exe) when i click in "Open" Button on Dialogue.I don't know use CreateProcess in function : "void CthunghiemDlg::OnOpen" because CreateProcess is function return Bool Value,and with what value of this function is a application called?

Re: Open other Application From Dialogue

Richard MacCutchan18-May-11 1:19

Richard MacCutchan

18-May-11 1:19

camuoi288 wrote:
.I don't know use CreateProcess

All explained here[^].

camuoi288 wrote:
because CreateProcess is function return Bool Value

This is merely a value to tell you whether CreateProcess() succeeded or not.

The best things in life are not things.

Re: Open other Application From Dialogue

వేంకటనారాయణ(venkatmakam)17-May-11 23:30

వేంకటనారాయణ(venkatmakam)

17-May-11 23:30

Check this Article,
A newbie's elementary guide to spawning processes[^]

Creating a process, and then killing it[^]

http://www.mono-project.com/Main_Page

Re: Open other Application From Dialogue

Legor17-May-11 23:31

Legor

17-May-11 23:31

What exactly don't you know? As you said it you'd have to add the code for creating a process in the button click event handler.

Re: Open other Application From Dialogue

camuoi28817-May-11 23:43

camuoi288

17-May-11 23:43

Example i want to call InternetExplorer.exe when i click on "Open" button,so what code i need add to "void CthunghiemDlg :: OnOpen".
Because CreateProcess is function return Bool Value.

Re: Open other Application From Dialogue

ShilpiP18-May-11 1:55

ShilpiP

18-May-11 1:55

Simple Example of CreateProcess

//Global Variable
DWORD g_nRetVal = 0;
DWORD g_nWaitCode = 0;
HANDLE g_hWaited = NULL;

DWORD WINAPI RunUtils(void *pParam) { 
	LPCTSTR szExe = TEXT("Path of executable");
	LPTSTR szParams = TEXT(" /d C:");
	HANDLE hEvent = NULL;
	PROCESS_INFORMATION ProcessInfo;
	ZeroMemory(&ProcessInfo, sizeof(ProcessInfo));
	STARTUPINFO StartupInfo;
	ZeroMemory(&StartupInfo, sizeof(StartupInfo));
	StartupInfo.cb = sizeof(StartupInfo);
	StartupInfo.dwFlags = STARTF_USESHOWWINDOW;
	StartupInfo.wShowWindow = SW_HIDE;
	hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
	if (CreateProcess(szExe, szParams, NULL, NULL, FALSE, CREATE_NEW_CONSOLE, NULL, NULL, &StartupInfo, &ProcessInfo)) {
		g_nWaitCode = WaitForSingleObject(ProcessInfo.hProcess, INFINITE);
		switch (g_nWaitCode) {
			case WAIT_OBJECT_0:
				GetExitCodeProcess(ProcessInfo.hProcess, &g_nRetVal);
				break;

			case WAIT_FAILED:
				g_nWaitCode = GetLastError();
				break;
		}
		::CloseHandle(ProcessInfo.hProcess);
		::CloseHandle(ProcessInfo.hThread);
		
		ResetEvent(hEvent);

		HWND hWnd = (HWND) pParam;
		SendMessage(hWnd, WM_USER_THREAD_WAITED, 0, 0);
	}
	return 0;
}

void CThunghiemDlg::OnButtonOpen()
{
	// TODO: Add your control notification handler code here
	HANDLE hExecThread = NULL;
	if(m_bCleanUp)
	{
		hExecThread = CreateThread(NULL, 0, &RunUtils, (LPVOID) m_hWnd, 0, NULL);
	}
}

You can do the same by using ShellExecute

void CThunghiemDlg::OnButtonOpen() 
{
	ShellExecute(NULL, "open", "path of executable", NULL, NULL, SW_SHOWNORMAL);	
	
}

"Every Little Smile can touch Somebody's Heart...
May we find Hundreds of Reasons to Smile Everyday... and
May WE be the Reason for someone else to smile always!" (ICAN)

Re: Open other Application From Dialogue

camuoi28818-May-11 17:06

camuoi288

18-May-11 17:06

I want to ask:
"m_bCleaup variable and WN_USER_THREAD_WAITED variable".How are they declared?and how to use them?

Re: Open other Application From Dialogue

ShilpiP18-May-11 18:40

ShilpiP

18-May-11 18:40

no need to use these variable.

"Every Little Smile can touch Somebody's Heart...
May we find Hundreds of Reasons to Smile Everyday... and
May WE be the Reason for someone else to smile always!" (ICAN)

accessing the document object model of any window in win32 api or .net

Jayapal Chandran17-May-11 22:35

Jayapal Chandran

17-May-11 22:35

Hi,
i want to access any windows DOM like in javascript(DHTML).
Is that possible? if so then please give me references, links and suggestions.

http://vikku.info/

Today's Beautiful Moments are
Tomorrow's Beautiful Memories

Re: accessing the document object model of any window in win32 api or .net

Abhi Lahare18-May-11 6:17

Abhi Lahare

18-May-11 6:17

The question is little bit confusing, Are you looking to access the HTML page from IE window and trying to read the HTML tag?

Re: accessing the document object model of any window in win32 api or .net

Jayapal Chandran18-May-11 13:55

Jayapal Chandran

18-May-11 13:55

I want to write a program which will access any other windows DOM for example Internet Explorer and its html components like text box, radio button and so on.

And also firefox or any other browser.

Besides i want to access desktop application's objects similar to html DOM.

Hope i had made it clear.

Even the taskbar, the start button, the tray icons.

If you could assume the desktop as an html page and then i want access all like what we do in dhtml.

http://vikku.info/

Today's Beautiful Moments are
Tomorrow's Beautiful Memories

Re: accessing the document object model of any window in win32 api or .net

Abhi Lahare19-May-11 8:43

Abhi Lahare

19-May-11 8:43

Your requirement is quite huge, for Browsers you can Look for Browser Helper Objects ( BHO ) for IE you can get started with Popup Window Blocker[^] article. XPCOM for Mozilla browsers.

On taskbar, start button and tray button, I am not sure what is the intention of developing such application. MSAA[^] can give you some idea.

HTH

ReadFile () reads Junk characters when tried to read from COM1 Port

pandit8417-May-11 3:34

pandit84

17-May-11 3:34

Hi ,

I have created sample application which opens the serial COM Port and tried to write and Read the data.
I have used CreateFile () method to open the COM1.

hCom =  CreateFile (pcCommPort,GENERIC_READ | GENERIC_WRITE,0,NULL, OPEN_EXISTING, 0,NULL );

Then I set the COM state

GetCommState( hCom, &lpCC.dcb);
lpCC.dcb.BaudRate = CBR_9600;     //  baud rate
lpCC.dcb.StopBits = ONESTOPBIT;    //  stop bit
lpCC.dcb.ByteSize = 8;             //  data size, xmit and rcv
lpCC.dcb.Parity   = NOPARITY;      //  parity bit
lpCC.dcb.fBinary = TRUE ;
lpCC.dcb.fParity = TRUE ;
     SetCommState( hCom, &lpCC.dcb );

I am trying to write the data using

WriteFile (hCom,(LPCVOID)ptr,20,&byteswritten,NULL);

and trying to read the data using

ReadFile (hCom, (LPVOID)ptr, 20, &dwBytesTransferred, 0);

ptr is pointer to the BYTE array. The above code of "ReadFiles() returns true and Reads Junk characters. I have written exact 20 characters through WriteFile() and it returned TRUE . I am not able to figure out the exact problem . Please provide any input in this regards.

Thanks

Re: ReadFile () reads Junk characters when tried to read from COM1 Port

David Crow17-May-11 3:50

David Crow

17-May-11 3:50

pandit84 wrote:
...and Reads Junk characters.

How are you verifying this?

Do you know that data is available to read before calling ReadFile()?

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Re: ReadFile () reads Junk characters when tried to read from COM1 Port

pandit8417-May-11 3:55

pandit84

17-May-11 3:55

I am printing the ptr using printf statement.

Re: ReadFile () reads Junk characters when tried to read from COM1 Port

barneyman17-May-11 4:01

barneyman

17-May-11 4:01

if you're doing this between two computers, you are using a null-modem cable?

Re: ReadFile () reads Junk characters when tried to read from COM1 Port

pandit8417-May-11 4:04

pandit84

17-May-11 4:04

I have not yet tried this on two computers. I am using only one computer to test.

Re: ReadFile () reads Junk characters when tried to read from COM1 Port [modified]

barneyman17-May-11 4:10

barneyman

17-May-11 4:10

I doubt very much the COM redirector understands how to loopback

i.e. You can't read and write on the same COM port on the same computer, and if you have a machine with two COM ports, you still need a null modem cable between them

modified on Wednesday, May 18, 2011 4:31 AM

Re: ReadFile () reads Junk characters when tried to read from COM1 Port

David Crow17-May-11 4:03

David Crow

17-May-11 4:03

And that looks like?

Message Removed

17-May-11 4:05

pandit84

17-May-11 4:05

Message Removed

Re: ReadFile () reads Junk characters when tried to read from COM1 Port