C / C++ / MFC Discussion Boards

Re: How do I pass parameters between 2 single document apps??

Michael Dunn3-May-03 7:58

3-May-03 7:58

The command line params are readable in several ways. The easiest for you would probably be __argc and __argv, which are set up by the C library.

--Mike--
Mister Sparkle is disrespectful to dirt.
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"You have Erica on the brain" - Jon Sagara to me

Re: How do I pass parameters between 2 single document apps??

User 66583-May-03 7:59

User 6658

3-May-03 7:59

You can use WM_COPYDATA for that purpose. Alternatively, take a look at all the "inter-process communication" articles on this site Smile | :)

To get the application parameters you can use GetCommandLine().

regards

modified 12-Sep-18 21:01pm.

Re: How do I pass parameters between 2 single document apps??

nemo3-May-03 8:00

nemo

3-May-03 8:00

If you already have a scheme in mind that would work using argv & argc you can do the same thing with a windows application by calling GetCommandLine(). Call it from your OnInit or other initialization function it will give back the appname, path and the command line arguments as a string. Then just parse the string to get the arguments. Have fun.... Smile | :)

Re: How do I pass parameters between 2 single document apps??

Cambalindo3-May-03 11:15

Cambalindo

3-May-03 11:15

I use the following code in two apps I wrote, app1 run first and call app2 with parameters. I don´t know if there is a better way but it worked fine.
In APP1 the caller app:

char arg[10];//parameter to pass from app1 to app2
fflush(NULL);
//call app2.exe and leaves app1 waiting.
_spawnl(P_WAIT,"app2.exe","app2.exe",arg,NULL);

//call app2.exe and ends app1.
//_execl( "EcoBase.exe", NULL, NULL,NULL, NULL );

In InitInstance() of the called app2:

//check if there are paremeters
if(m_lpCmdLine[0]==_T('\0'))
{
//normal execution of app2 without parameters
if(!ProcessShellCommand(cmdInfo))
return FALSE;
pMainFrame->ShowWindow(m_nCmdShow);
pMainFrame->UpdateWindow();
return TRUE;

}
else//execution of app2 with parameters
{
cmdInfo.m_nShellCommand=CCommandLineInfo::FileNew;
if (!ProcessShellCommand(cmdInfo))
return FALSE;
pMainFrame->ShowWindow(m_nCmdShow);
pMainFrame->UpdateWindow();
return TRUE;
//do what you want to do with parameters in m_lpComdLine
}
cheers!!

Daniel Cespedes Daza
"Santa Cruz de la Sierra Paraiso Terrenal!"
daniel.cespedes@ieee.org

Re: How do I pass parameters between 2 single document apps??

Brian Shifrin4-May-03 3:12

Brian Shifrin

4-May-03 3:12

Many different possibilities: mappedFiles, mailslots, sockets, WM_COPYDATA. If the data is fixed, you can use SendMessage/SendMessageTimeout with registered message, etc, etc, etc

Re: Can someone plz show me how to use GetCommandLine() ??

IrishSonic4-May-03 4:05

IrishSonic

4-May-03 4:05

Thanks for that. What I have decided to do is this:

// in app1
PROCESS_INFORMATION ProcessInfo;
STARTUPINFO StartupInfo;

ZeroMemory( &StartupInfo,sizeof(StartupInfo) );

StartupInfo.cb = sizeof( StartupInfo );

if( CreateProcess("d:\\MyApp1.exe","TestString",
NULL,NULL,FALSE,0,NULL,
NULL,&StartupInfo,&ProcessInfo ))
{
WaitForSingleObject( ProcessInfo.hProcess,INFINITE );

CloseHandle( ProcessInfo.hThread );
CloseHandle( ProcessInfo.hProcess );
}
else
{
cout << "Error - Opening Process..";
}

The second parameter is the command line argument. So now I can use GetCommandLine() function.

But I can't get GetCommandLine to work for me. Can someone show me please how to use this function??

Thanks for all ur help.

Re: Can someone plz show me how to use GetCommandLine() ??

IrishSonic4-May-03 4:41

IrishSonic

4-May-03 4:41

I have now got GetCommandLine() function but I can't see my messagebox in the second app..

// in app2
CString str = GetCommandLine();
AfxMessageBox( str );

Thanks..

IP Address

Mazdak3-May-03 6:08

Mazdak

3-May-03 6:08

I want to connect to my mail server and get mails with Windows Sockets. I want to how can I connect to mail my server with its name ,not with its IP,because I don't know it IP.Any Suggestion?

Mazy

"And the carpet needs a haircut, and the spotlight looks like a prison break
And the telephone's out of cigarettes, and the balcony is on the make
And the piano has been drinking, the piano has been drinking...not me...not me-Tom Waits

Re: IP Address

Nish Nishant3-May-03 6:40

Nish Nishant

3-May-03 6:40

Mazy

See my intro articles on winsock programming. It explains how to do this somewhere. Smile | :)

Nish

"I'm a bit bored at the moment so I'm thinking about writing a new programming language" - Colin Davies

My book :- Summer Love and Some more Cricket [New Win]
Review by Shog⁹ Click here for review[NW]

Re: IP Address

Mazdak3-May-03 8:13

Mazdak

3-May-03 8:13

OK Nish. Thanks. Smile | :)

Mazy

"And the carpet needs a haircut, and the spotlight looks like a prison break
And the telephone's out of cigarettes, and the balcony is on the make
And the piano has been drinking, the piano has been drinking...not me...not me-Tom Waits

Re: IP Address

Nish Nishant3-May-03 8:23

Nish Nishant

3-May-03 8:23

Mazdak wrote:
OK Nish. Thanks.

See :- http://www.codeproject.com/internet/winsockintro02.asp

if(inet_addr(servername)==INADDR_NONE)
{
    //domain name
    hp=gethostbyname(servername);
}
else
{
    //IP addr
    addr=inet_addr(servername);
    hp=gethostbyaddr((char*)&addr,sizeof(addr),AF_INET);
}

Re: IP Address

Mazdak3-May-03 9:10

Mazdak

3-May-03 9:10

Oh Nish,Thankssssss,I found your article myself. There is no need to paste code. I just say thank you for your reply.Your article is very clear and I find the answer from it very easily. What did you think about my answer man? Confused | :confused:

Anyway,thank you again.I find the answer from your article, Smile | :)

Re: IP Address

Nish Nishant3-May-03 9:16

Nish Nishant

3-May-03 9:16

Mazdak wrote:
Oh Nish,Thankssssss,I found your article myself

Oh sorry! I just felt guilty at the lazy response I had given you Frown | :-(

Anyway glad to know you found what you were looking for Smile | :)

Nish

Re: IP Address

Mazdak3-May-03 9:39

Mazdak

3-May-03 9:39

I've written very handy application for my CP library and I can search through my CP files very quick. Smile | :)

What cause such a link problem?

ray_li3-May-03 5:51

ray_li

3-May-03 5:51

Hello, everyone!

After downloading a sourcecode from codeproject, I compiled and linked it, a link error LNK2001 appeared, I found it is caused by this code: char *chpBuf = new char[10]; if I marked off it or change the chpBuf into char array chpBuf[10]. The problem will be solved.

I also try to change the setting of VC, but it doesn't work. I wonder if some of you once met simmilar problem and how you sovle it?

Thanks.

Ray

Re: What cause such a link problem?

jhaga3-May-03 9:51

jhaga

3-May-03 9:51

Which article are you talking about?

jhaga

Re: What cause such a link problem?

Hari Krishnan (Noida)5-May-03 2:26

Hari Krishnan (Noida)

5-May-03 2:26

Hi Ray,
Is that struct member alignment in
(Settings:C++\Code Generation) settings is different from the default(marked with *)?
OR
Is this comes only with Release Mode build? In which build mode this problem appears?

regards
~Hari~

Help me Friends

HemantR...3-May-03 4:23

HemantR...

3-May-03 4:23

Friends, I want to cach the event of opening a perticuler application, for that i use Windows Hook. I get the handel of the window but from which application/proccess this window belongs i dont know.
Is there any procedure which give me the process Name, if i will supplied it the window Handle
Waiting for the Positive reply

Re: Help me Friends

56789012344-May-03 1:36

5678901234

4-May-03 1:36

GetWindowThreadProcessId - get process ID from window handle

OpenProcess - get process handle

Call EnumProcessModules, for each enumerated module call GetModuleFileNameEx.

Help me

HemantR...3-May-03 4:18

HemantR...

3-May-03 4:18

Directshow

Liaqat Fayyaz3-May-03 3:09

Liaqat Fayyaz

3-May-03 3:09

while capturing a DV Type-2 file using Microsoft Soft DV encoder "MS DV Encoder" i noticed that the type-2 encoded file size is less than the type-2 file captured from any camcoder using directshow.(Type-1 is ok).

e.g
30 sec type-2 captured from DV Camcoder = 100MB
30 sec type-2 captured from "MS DV Encoder" = 80 MB

I have tried all the interfaces (like IAMVideoCompression ,IDVEnc ..) available on "MS DV Encoder" to do some tweaking but the results are same.

so any one who can help me or explain the reason?????

Liaqat

A question about MDI

eefelix3-May-03 0:04

eefelix

3-May-03 0:04

Hi, I'm creating a MDI application, with different views (e.g data view, chart view) link to the same doc.

When I open these views the childframe titled "doc:1", "doc:2".

However, I want to change the titled as "doc:data", "doc:chart", is it possible ? If yes then how to do it ? Thanks a lot!

Re: A question about MDI

Pavel Klocek3-May-03 2:31

Pavel Klocek

3-May-03 2:31

You can overide the void OnUpdateFrameTitle(BOOL bAddToTitle) method in the frame window classes of your documents (CMDIChildWnd derived):

void CChartFrame::OnUpdateFrameTitle(BOOL bAddToTitle)
{
	// update our parent window first
	GetMDIFrame()->OnUpdateFrameTitle(bAddToTitle);

	SetWindowText("doc:chart");
}

Pavel
Sonork 100.15206

Re: A question about MDI

Hari Krishnan (Noida)5-May-03 18:47

Hari Krishnan (Noida)

5-May-03 18:47

Hi,
Hope the following code snippet will help.

BOOL CChildFrame::PreCreateWindow(CREATESTRUCT& cs)
{
//--- Following Lines will do the trick---
cs.style &= ~FWS_ADDTOTITLE;
cs.lpszName = "APP NAME : CHILD DOC NAME";
//----------------------------------------

if( !CMDIChildWnd::PreCreateWindow(cs) )
return FALSE;

return TRUE;
}

BOOL CMainFrame::PreCreateWindow(CREATESTRUCT& cs)
{
//--- Following Lines will do the trick---
cs.style &= ~FWS_ADDTOTITLE;
cs.lpszName = "Mainframe";
//----------------------------------------

if( !CMDIFrameWnd::PreCreateWindow(cs) )
return FALSE;

return TRUE;
}

regards
~Hari~

Application will be closing when Pressed "Enter" or "Escape"

YSRao2-May-03 23:48

YSRao

2-May-03 23:48

The Applications which I have written in vc++ are terminating when I press "Enter" Button or pressing "Escape" button.How can I prevent this type of termination.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.