C / C++ / MFC Discussion Boards

borland22-Jan-02 17:05

22-Jan-02 17:05

if you've ever done ANY C++ programming outside of VC then you'll know all about makefiles.

They are the text-based equivalent of your project options. They tell the compiler (gcc/++ in most cases) what files to compile and how to compile each one, etc etc

: Wherever you go, there you are, and you wish you were somewhere else :

SendInput

Mark Donkers22-Jan-02 8:14

Mark Donkers

22-Jan-02 8:14

Does anyone have a solid example on how use SendInput(). All the examples that are out there, are in VB.

Also, see my memcpy() statements. Am I copying a structure into a structure of a structure properly?

<br />
    BOOL fNumLockState;<br />
    BYTE keys[255];<br />
    INPUT inp[2];<br />
    KEYBDINPUT kbi;<br />
<br />
<br />
    GetKeyboardState( keys );<br />
    <br />
    // NumLock handling:<br />
    fNumLockState = keys[VK_NUMLOCK];<br />
    if( !fNumLockState ) // Turn numlock on<br />
    {    <br />
        kbi.wVk         = VK_NUMLOCK;<br />
        kbi.wScan       = 0;  // not needed<br />
        kbi.dwFlags     = 0;  // press the key down<br />
        kbi.time        = 0;  // use the default<br />
        kbi.dwExtraInfo = 0;  // not needed<br />
        <br />
        memcpy( &(inp[0].ki), &kbi, sizeof(kbi) );<br />
        inp[0].type     = INPUT_KEYBOARD;<br />
        <br />
        kbi.dwFlags     = KEYEVENTF_KEYUP;      // release  the key down<br />
        <br />
        memcpy( &(inp[1].ki), &kbi, sizeof(kbi) );<br />
        inp[1].type     = INPUT_KEYBOARD;<br />
        <br />
        if( SendInput( 2, inp, sizeof(inp) ) != 2 )<br />
        {<br />
            TRACE(_T("SendInput error [%d]"), GetLastError() );<br />
        }                <br />
    }                <br />

Marcus

Make no little plans; they have no magic to stir your blood to action. Make big plans, aim high in work and hope
-- Daniel Burnham

Re: SendInput

Mark Donkers22-Jan-02 10:48

Mark Donkers

22-Jan-02 10:48

figured it out...

the line:
if( SendInput( 2, inp, sizeof(inp) ) != 2 )

should be...
if( SendInput( 2, inp, sizeof(INPUT) ) != 2 )

Marcus

Make no little plans; they have no magic to stir your blood to action. Make big plans, aim high in work and hope
-- Daniel Burnham

getting a machine's ip address

Kuniva22-Jan-02 5:45

Kuniva

22-Jan-02 5:45

Hi, i need the function to get a machine's ip address. I remember there was a simple function for this without MFC allthough it doesn't really matter if its with MFC or not. I just forgot it and cant find it anymore. So i'd be thankful if someone could tell me. Many thanks.

Kuniva
--------------------------------------------
God gave man a penis and a brain but not enough blood to make both of 'em work at the same time.

Re: getting a machine's ip address

Jon Sagara22-Jan-02 6:00

Jon Sagara

22-Jan-02 6:00

Someone post this link in another post.

Jon Sagara

What about ?

Re: getting a machine's ip address

Vladimir Georgiev22-Jan-02 6:01

Vladimir Georgiev

22-Jan-02 6:01

gethostbyname()

"Needless redundancy is the hobgoblin of software engineering." - Peter Darnell

Re: getting a machine's ip address

Kuniva22-Jan-02 6:45

Kuniva

22-Jan-02 6:45

erh... this is gonna sound silly but how do i convert a const char* to a CString??? I guess working with CStrings all the time has kind of killed my knowledge of chars and pointers...
Thanks again for your answer.

Kuniva
--------------------------------------------
God gave man a penis and a brain but not enough blood to make both of 'em work at the same time.

Re: getting a machine's ip address

Mark Donkers22-Jan-02 8:36

Mark Donkers

22-Jan-02 8:36

CString strText;
strText.Format(_T("%s"), szString);

Marcus

Make no little plans; they have no magic to stir your blood to action. Make big plans, aim high in work and hope
-- Daniel Burnham

Re: getting a machine's ip address

22-Jan-02 11:28

or more simply....

CString strText(szString);

John

Re: getting a machine's ip address

borland22-Jan-02 11:54

borland

22-Jan-02 11:54

you can just go CString str = (some char*) and it'll work

: Wherever you go, there you are, and you wish you were somewhere else :

MP3 player

bh_bad200222-Jan-02 5:28

bh_bad2002

22-Jan-02 5:28

I am trying to start off and make an MP3 player using DirectX. But i need to know where to start. If anybody can give me anyhelp on getting started on this small project it would be greatly appreciated. OMG | :OMG:

thebh_bad

Re: MP3 player

Christian Graus22-Jan-02 9:59

Christian Graus

22-Jan-02 9:59

There's full source on CP, look for MPEG and you'll find the article. It's in C though, so it only allows one song played at a time ( it's all done using global variables and functions ). There's plenty of info on mp3 decoding on the net, just fire up google and search for 'mp3 c++ source'.

Christian

I have come to clean zee pooollll. - Michael Martin Dec 30, 2001

Sonork ID 100.10002:MeanManOzI live in Bob's HungOut now

An easy one for any seasoned pro....

Paul Barrass22-Jan-02 5:08

Paul Barrass

22-Jan-02 5:08

Hi everyone,

I need to programatically mute the volume of the soundcard in a machine (just like clicking on the volume control icon in the tray.

Anybody know a quick way of doing this?

Cheers,

Paul

Re: An easy one for any seasoned pro....

Jamie Hale22-Jan-02 5:38

Jamie Hale

22-Jan-02 5:38

I'm not a multimedia seasoned pro, but have a look at waveOutSetVolume() or any of the other functions under Windows Multimedia in the Platform SDK in the MSDN library. That's where I'd start.

J

Re: An easy one for any seasoned pro....

Paul Barrass22-Jan-02 22:17

Paul Barrass

22-Jan-02 22:17

Thanks for pointing me in the right direction Jamie.

Cheers,

Paul

PWALK: DLL Memory Checking

Jim99922-Jan-02 4:03

Jim999

22-Jan-02 4:03

I am having an intermittent problem with a DLL function call and thought that the PWALK Platform SDK tool would help me debug things.

However although I got the project to compile it doesn't seem to work. I am running on NT and there is an MSDN article that suggests this only works in 16 bit land. Has anyone got this to work on NT, or has used an equivalent tool?

Ta

Jim

GDI+ & CMYK TIFFs

Andy Brace22-Jan-02 3:22

Andy Brace

22-Jan-02 3:22

Has anyone had any experience trying to display CMYK Color Space TIFFs using GDI+ and the Image/Bitmap class?
The TIFF when displayed has the colors all messed up. A corresponding TIFF in the RGB color space displays just fine.
Thanks

Andy Brace
SW Development Engineer II
Qwest
A clear conscience is usually the sign of a bad memory.

How to same class of FindControls in a Dialog?

22-Jan-02 2:40

Hi,

I have a dialog having several conrols eg. CEdits, CListbox, and CGridCtrls (MFCGridCtrl in my problem).

When I want to click a button in my dialog
First I want to get a list of all controls and then
get handles/pointers to a certain kind of control (eg CGridCtrl).

I tried GetActiveWindow, GetNextWindow, FindWindow("CGridCtrl", NULL)
but I could not manage.

Any idea?

Re: How to same class of FindControls in a Dialog?

22-Jan-02 3:39

Try

CWnd* CWnd::GetDlgItem (int nID) const;

or for HWND handle

void CWnd::GetDlgItem (int nID, HWND* phWnd) const;

Re: How to same class of FindControls in a Dialog?

Roger Allen22-Jan-02 4:08

Roger Allen

22-Jan-02 4:08

You can make use of GetNextWindow() and then check the pointer using

if (pWnd->IsKinfOf(RUNTIME_CLASS(CGridCtrl))
{
// this is the right window type
CGridCtrl* pGrid = (CGridCtrl*)pWnd ;
// use it...
}

Roger Allen
Sonork 100.10016

If I'm not breathing, I'm either dead or holding my breath.

using OpenGL with visual C++

Rajveer22-Jan-02 2:11

Rajveer

22-Jan-02 2:11

I'm using OpenGL to help me design 3D graphics software. I'm just practising now. I used the tutorial on nehe.gamedev.net to create my openGL window. How can I add stuff like dialog boxes and push buttons and menus on the screen which will execute different commands to the software. I have a book on visual C++, but when I'm using OpenGL as my API, that book seems useless to help me with the non graphics part. It all seems so different. Please tell me if I have to do everything using only OpenGL syntax now that I've made the window with OpenGL?? Cause then I'm guessing I'd need the OpenGL book.

Re: using OpenGL with visual C++

Michael A. Barnhart22-Jan-02 2:17

Michael A. Barnhart

22-Jan-02 2:17

First there are several samples here:
http://www.codeproject.com/opengl/

The most common practice is to have a display window showing the OpenGL as a child to the application (or frame/view/whatever.) Buttons etc are not in that window.

Re: using OpenGL with visual C++

Carlos Antollini22-Jan-02 2:50

Carlos Antollini

22-Jan-02 2:50

You can find some samples and tutorials in the MSDN...

Regards...

Carlos Antollini.
Sonork ID 100.10529 cantollini

Re: using OpenGL with visual C++

22-Jan-02 3:23

http://devcentral.iticentral.com/articles/C++/openGL/default.php

http://nehe.gamedev.net/

Re: using OpenGL with visual C++

22-Jan-02 4:34

Try www.opengl.org

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