C / C++ / MFC Discussion Boards

Rage31-May-07 4:04

31-May-07 4:04

Hi,

I have a console app that is called by another program. I would like my console app to run hidden, is there a way to achieve this ?

Thanks

Constantly "Saving the day" should be taken as a sign of organizational dysfunction rather than individual skill - Ryan Roberts[^]

Re: hiding a console app

toxcct31-May-07 4:12

toxcct

31-May-07 4:12

::ShellExecute(NULL, "open", "theprog.exe", NULL, NULL, <code>SW_HIDE</code>);

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Re: hiding a console app

Rage31-May-07 4:22

Rage

31-May-07 4:22

Thanks tox, but I cannot modify the call to the console app (otherwise I would have done what you said, trivial, of course). I must hide the console app from within the app directly.

Constantly "Saving the day" should be taken as a sign of organizational dysfunction rather than individual skill - Ryan Roberts[^]

Re: hiding a console app

toxcct31-May-07 4:28

toxcct

31-May-07 4:28

a console program cannot hide itself unfortunately (not that easily AFAIK at least)

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Re: hiding a console app

Rage31-May-07 5:22

Rage

31-May-07 5:22

Je le savais. C'etait juste pour persuader un collègue qui ne voulait pas me croire Roll eyes | :rolleyes:

Constantly "Saving the day" should be taken as a sign of organizational dysfunction rather than individual skill - Ryan Roberts[^]

Re: hiding a console app

toxcct31-May-07 5:24

toxcct

31-May-07 5:24

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Re: hiding a console app

Matthew Faithfull31-May-07 5:04

Matthew Faithfull

31-May-07 5:04

If you have control of the Console App end you could make it a fake Console App i.e. make it a Windows App but don't create any Windows just use AllocConsole if and when you do want a Console to appear.
The difference between the two is just a setting in the PE Header stuff on the front of your executable which is picked up by the C Runtime to determine it's mode setting. If it determines it's bootstrapping a Console App it allocates a Console otherwise it doesn't. There are other differences, in IO for example, but they all boil down to different paths in the startup code of the CRT. There's nothing, for example, to stop a Console App creating Windows and doing GUI stuff. In fact many DirectX games are done this way. They start out running as Console Apps and bootstrap DirectX from there to take over the entire screen.;) Equally A Windows app may have no actual Windows and could even have a Console if it decides to create one. I do this lot for scratch/testing type apps.

Nothing is exactly what it seems but everything with seems can be unpicked.

Re: hiding a console app

Rage31-May-07 5:22

Rage

31-May-07 5:22

Matthew Faithfull wrote:
Equally A Windows app may have no actual Windows and could even have a Console if it decides to create one.

This sounds interesting. How would you call a console from a win32 app ?

Constantly "Saving the day" should be taken as a sign of organizational dysfunction rather than individual skill - Ryan Roberts[^]

Re: hiding a console app

Matthew Faithfull31-May-07 5:49

Matthew Faithfull

31-May-07 5:49

First off you need to get yourself a Console and then you can use stdin and stdout as normal. Have a look here http://msdn2.microsoft.com/en-us/library/ms682528.aspx[^]
or you can use API calls like

BOOL WINAPI ReadConsole( HANDLE hConsoleInput, LPVOID lpBuffer, DWORD nNumberOfCharsToRead, LPDWORD lpNumberOfCharsRead, LPVOID pInputControl );

I have a pretty much complete wrapper class for the Console API functions which I may post on CP at some point if anyone's interested.;)

Nothing is exactly what it seems but everything with seems can be unpicked.

Re: hiding a console app

tom groezer31-May-07 5:24

tom groezer

31-May-07 5:24

What do you mean when you say cthe following

If you have control of the Console App end you could make it a fake Console App i.e. make it a Windows App but don't create any Windows just use AllocConsole if and when you do want a Console to appear.

I guess using ShellExecute shall serve the purpose.

Displaying help popup under the control in VC++

Merryla Martina31-May-07 3:49

Merryla Martina

31-May-07 3:49

Hi All,

I have created an application in vc++ using the Appwizard with some dialog in it but without help support.
Now I am in need of providing help msg for the controls in the dialog.So later added support for the help.
Somehow managed to provide the help popup using WinHelp.

Currently I am able to get the help popup message at the cursor position .
But I need to display it near the control, not at the cursor position.

FYI The code looks like this

//InputDialog.h

afx_msg BOOL OnHelpInfo(HELPINFO* pHelpInfo);

//InputDialog.cpp

BEGIN_MESSAGE_MAP(InputDialog, CDialog)
ON_WM_HELPINFO()
END_MESSAGE_MAP()

BOOL InputDialog::OnHelpInfo(HELPINFO* pHelpInfo)
{
// TODO: Add your message handler code here and/or call default

CRect Rect;
CPoint XPoint,YPoint,CtrlPoint;

CWnd* pControl = GetDlgItem( pHelpInfo->iCtrlId );

//Get the coordianate of the control -Example Radio button in the Dialog

pControl->GetClientRect(&Rect);
pControl->ClientToScreen(&Rect);

XPoint=Rect.TopLeft();
YPoint=Rect.BottomRight();

CtrlPoint.x = XPoint.x;
CtrlPoint.y = YPoint.y;

//Assign the control coordinate to the mouse Position
pHelpInfo->MousePos = CtrlPoint;

DWORD dwContextID = pControl->GetWindowContextHelpId();

//Only proceed if it's not a static control
if (cControlID != 65535) //65535 is IDC_STATIC
{
AfxGetApp()->WinHelp( dwContextID ,HELP_CONTEXTPOPUP);
}

return CDialog::OnHelpInfo(pHelpInfo);
}

Also, I am not sure whether the GetClientRect together with ClientToScreen returns the control screen coordinate.

Please, can anybody help me ?

Thanks
Martina

TranslateAccelerator doubt

tom groezer31-May-07 3:36

tom groezer

31-May-07 3:36

Below is the stub of code that is found on MSDN.

MSG msg;<br />
BOOL bRet;<br />
<br />
while ( (bRet = GetMessage(&msg, (HWND) NULL, 0, 0)) != 0)<br />
{<br />
    if (bRet == -1) <br />
    {<br />
        // handle the error and possibly exit<br />
    }<br />
    else<br />
    { <br />
        // Check for accelerator keystrokes. <br />
     <br />
        if (!TranslateAccelerator( <br />
                hwndMain,      // handle to receiving window <br />
                haccel,        // handle to active accelerator table <br />
                &msg))         // message data <br />
        {<br />
            TranslateMessage(&msg); <br />
            DispatchMessage(&msg); <br />
        } <br />
    } <br />
}

Please refer to the above code. The TranslateAccelerator function compares the keystokes it receives to the accelator table and if there is a match then it posts the message(WM_COMMAND and WM_SYSCOMMAND) to the the window procedure to get processes. It returns only after successful processing of the message. MSDN says that if TranslateAccelerator fails then it returns 0. In that case the above if condition is satisfies. I see a error above. Does anybody has any view on the same?

The link to the same is:-
http://msdn2.microsoft.com/en-us/library/ms646337.aspx[^]

Calling the Translate Accelerator Function

Re: TranslateAccelerator doubt

toxcct31-May-07 3:40

toxcct

31-May-07 3:40

tom groezer wrote:
I see a error above

which ? where ?

can't you help a little ?

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Re: TranslateAccelerator doubt

Rajkumar R1-Jun-07 2:54

Rajkumar R

1-Jun-07 2:54

Hi,
TranslateAccelerator returns only after successful processing of accelerator key commands if the message is window message like WM_PAINT it will not be processed by it,
it has to be further processed by TranslateMessage().

when you read the document you have to complete it atleast understanding the major facts.

please see the quotes from msdn for TranslateAccelerator()
"When TranslateAccelerator returns a nonzero value and the message is translated, the application should not use the TranslateMessage function to process the message again"

Re: CString::Format

toxcct31-May-07 3:20

toxcct

31-May-07 3:20

brahmma wrote:
How can I do that?

this time, that link[^] is for ya Poke tongue | ;-P

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Re: CString::Format

Rajesh R Subramanian31-May-07 3:44

Rajesh R Subramanian

31-May-07 3:44

Nobody can give you wiser advice than yourself. - Cicero

Re: CString::Format

Mark Salsbery31-May-07 7:15

Mark Salsbery

31-May-07 7:15

brahmma wrote:
How can I do that?

by reading the documentation documentation!

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Syntax

tom groezer31-May-07 3:06

tom groezer

31-May-07 3:06

I noted this syntax somewhere. Is it correct ne comments

static UINT UWM_TRAY_CALLBACK =
::RegisterWindowMessage(_T("UWM_TRAY_CALLBACK-")
_T("{6b8c4821-e6a4-11D1-8370-00aa005c0507}"));

Is the below syntax also correct?

static UINT UWM_TRAY_CALLBACK =
::RegisterWindowMessage(_T("UWM_TRAY_CALLBACK-{6b8c4821-e6a4-11D1-8370-00aa005c0507}"))

Re: Syntax

Rajesh R Subramanian31-May-07 3:14

Rajesh R Subramanian

31-May-07 3:14

tom groezer wrote:
static UINT UWM_TRAY_CALLBACK =
::RegisterWindowMessage(_T("UWM_TRAY_CALLBACK-")
_T("{6b8c4821-e6a4-11D1-8370-00aa005c0507}"));

Correct.

tom groezer wrote:
static UINT UWM_TRAY_CALLBACK =
::RegisterWindowMessage(_T("UWM_TRAY_CALLBACK-{6b8c4821-e6a4-11D1-8370-00aa005c0507}"))

Wrong, this one is missing a semicolon at the end.

Nobody can give you wiser advice than yourself. - Cicero

Re: Syntax

toxcct31-May-07 3:27

toxcct

31-May-07 3:27

it reminds once when i was wondering if the following were the same :

CString str = 
    _T("Hello ")
    _T("World!");

CString str = 
    _T("Hello "
       "World!");

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Re: Syntax

Roger Stoltz31-May-07 3:20

Roger Stoltz

31-May-07 3:20

tom groezer wrote:
Is the below syntax also correct?

Yes, your declarations are equivalent and produces the same operation.
Select one of them for readability reasons, some people go nuts when a line of code exceeds 80 characters. E.g. I really dislike when people are writing function calls like

nResult = GetResult
(
  Param1,
  Param2
);

Coding horror? Roll eyes | :rolleyes:

"It's supposed to be hard, otherwise anybody could do it!" - selfquote
"High speed never compensates for wrong direction!" - unknown

Re: Syntax

Rajesh R Subramanian31-May-07 3:23

Rajesh R Subramanian

31-May-07 3:23

Roger Stoltz wrote:
Coding horror?

Truly! Only rogues write code in that style. Roll eyes | :rolleyes:

Nobody can give you wiser advice than yourself. - Cicero

Re: Syntax

Roger Stoltz31-May-07 3:27

Roger Stoltz

31-May-07 3:27

brahmma wrote:
Truly! Only rogues write code in that style

Oh, you have no idea. Some people thinks this is part of the coding guidelines... which of course it's not. Mad | :mad:

"It's supposed to be hard, otherwise anybody could do it!" - selfquote
"High speed never compensates for wrong direction!" - unknown

Re: Syntax

jhwurmbach31-May-07 4:29

jhwurmbach

31-May-07 4:29

Roger Stoltz wrote:
Some people thinks this is part of the coding guidelines... which of course it's not.

How could you ever know?
You certainly don't have time to read those fascist pamphlets, do you? Roll eyes | :rolleyes:

Failure is not an option - it's built right in.

Re: Syntax

Roger Stoltz31-May-07 4:39

Roger Stoltz

31-May-07 4:39

jhwurmbach wrote:
You certainly don't have time to read those fascist pamphlets, do you?

Oh, but I have to, even though I don't have the time.
It's considered a prerequiste for the assignment and quite seriously this is how it should be.
My problem is fellow programmers that create or believe in myths about coding guidelines that aren't true and refuse to re-read the guidelines.

"It's supposed to be hard, otherwise anybody could do it!" - selfquote
"High speed never compensates for wrong direction!" - unknown

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