Retrieving Mouse State? - C / C++ / MFC Discussion Boards

otrcomm1-Oct-04 20:43

1-Oct-04 20:43

Hello all,

I am having a terrible problem trying to read in a gif file that has embedded '\0' characters.

I need to read the file and pass it to another application but can't find the correct Windows file i/o function.

Could someone please point me in the right direction?

Thanks,
Murrah Boswell

Re: Reading .gif File Problem

ThatsAlok1-Oct-04 21:02

ThatsAlok

1-Oct-04 21:02

yeah i too done this thing in my project

firstly i have tried from CStdioFile to ifstream.
but the best method suited for me is reading from
ifstream.

i copied whole file in a char string and send it thourgh Socket to another window application

-----------------------------
"I Think It Will Help"
-----------------------------
Alok Gupta
visit me at http://www.thisisalok.tk

Re: Reading .gif File Problem

otrcomm1-Oct-04 21:28

otrcomm

1-Oct-04 21:28

Hello Alok,

Do you mind sharing the code that you used to read a gif file into a char string? I can't seem to get CStdioFile to work and I am not familar with ifstream, but I will learn.

I have the same task, that is, read a gif file and send it to another application through a socket.

Actually, I am working on a 'push' version of the squid cache server, and that is what I am 'pushing' the gif file to.

Thanks,
Murrah Boswell

Re: Reading .gif File Problem

ThatsAlok1-Oct-04 21:50

ThatsAlok

1-Oct-04 21:50

No Problem Buddy ,
i will write the code here in one or two hour ,when i am able to find it from my code

till then wait

-----------------------------
"I Think It Will Help"
-----------------------------
Alok Gupta
visit me at http://www.thisisalok.tk

Re: Reading .gif File Problem

otrcomm2-Oct-04 5:54

otrcomm

2-Oct-04 5:54

Good deal! I had to get some sleep, but I'm back to it now.

Murrah Boswell

Got It! Re: Reading .gif File Problem

otrcomm3-Oct-04 15:00

otrcomm

3-Oct-04 15:00

I got it!

In my StdAfx.h I added:

#include <iostream>
#include <fstream.h>

Then in my module where I need to read the gif files:

BYTE * FileToPush;
int length=0;

<snip>

ifstream instream;
instream.open("c:\\path\\to\\file.gif",
ios::binary );

// get length of file:
instream.seekg (0, ios::end);
length = instream.tellg();

//get ready for read
instream.seekg (0, ios::beg);

// allocate memory:
FileToPush = new BYTE [length];

// read data as a block:
instream.read (FileToPush,length);
instream.close();

<snip>

Thanks for the help,
Murrah Boswell

Re: Got It! Re: Reading .gif File Problem

ThatsAlok3-Oct-04 20:14

ThatsAlok

3-Oct-04 20:14

Sorry Buddy,
i can't able to provide the solution on time please forgive me

-----------------------------
"I Think It Will Help"
-----------------------------
Alok Gupta
visit me at http://www.thisisalok.tk

Retrieving Mouse State?

Abin1-Oct-04 20:01

Abin

1-Oct-04 20:01

Is there any API that allows me to retrieve mouse state? Not cursor position, but the presses/unpressed state of mouse buttons. Thanks.

Re: Retrieving Mouse State?

J.B.1-Oct-04 20:19

J.B.

1-Oct-04 20:19

If you are using MFC, look for PreTranslateMessage(MSG *pMsg) method and tries to catch messages such as WM_LBUTTONDOWN for mouse clicks.

Hope it helps

MFC help

Anonymous1-Oct-04 18:05

Anonymous

1-Oct-04 18:05

Sorry this is a real noob question, but does anyone know the functions to hide something in MFC and then show it later when a button is hit?
ie when the person hits a button, i want a jpg to be displayed. The jpgs name is IDC_PICTURECLIP3. Thank You.

Re: MFC help

J.B.1-Oct-04 20:14

J.B.

1-Oct-04 20:14

Anonymous wrote:
Sorry this is a real noob question, but does anyone know the functions to hide something in MFC and then show it later when a button is hit?
ie when the person hits a button, i want a jpg to be displayed. The jpgs name is IDC_PICTURECLIP3. Thank You.

You can try this:

GetDlgItem(IDC_PICTURECLIP3)->ShowWindow(FALSE);

Re: MFC help

Anonymous1-Oct-04 20:33

Anonymous

1-Oct-04 20:33

thanks

Re: MFC help

ThatsAlok1-Oct-04 20:59

ThatsAlok

1-Oct-04 20:59

IN MFC i think here is a solution
Through Class Wizard make a Contral Variable for
That Contral that you want to hide. say m_ctrlPic

now In OnInitDialog()

m_ctrlPic.ShowWindow(SW_HIDE);

and say you want to show the Pic at any given event
then

//here is code for showing it back

m_ctrlPic.ShowWindow(SW_SHOW);

-----------------------------
"I Think It Will Help"
-----------------------------
Alok Gupta
visit me at http://www.thisisalok.tk

MFC File Search

missnazar1-Oct-04 17:43

missnazar

1-Oct-04 17:43

Hi Frendz,
Can any one help me out ....I want to make an MFC appwizard application that performs file search on local machine. I am a novice to MFC and I am out off time ...I could have searched and learnt bymyself. Due to time constraints am not able to devote time for searching and learning the things...Please... Cry | :((

if any one knows the way out then mail me .Thanking you in advance

Drushti

Re: MFC File Search

ThatsAlok1-Oct-04 18:20

ThatsAlok

1-Oct-04 18:20

Hello Madame Drusthi,
I think you are looking for CFileFind Class or there are some wrapper function for file seaching at at CP,so u have to devote atmost 30 second in searching them at CP Poke tongue | ;-P

-----------------------------
"I Think It Will Help"
-----------------------------
Alok Gupta
visit me at http://www.thisisalok.tk

Unregister a COM object

alex.barylski1-Oct-04 16:09

alex.barylski

1-Oct-04 16:09

How do I do this...??

How do I print my voice mail?

Re: Unregister a COM object

ThatsAlok1-Oct-04 18:23

ThatsAlok

1-Oct-04 18:23

HI Hockey

there may many ways,but i know two method only
#1 find the registry key associcated with your com in Registry and delete that key

or
#2 if you know the location of dll

use this command c:\windows\system32\regsvr32.exe \u your com path

-----------------------------
"I Think It Will Help"
-----------------------------
Alok Gupta
visit me at http://www.thisisalok.tk

Re: Unregister a COM object

parths3-Oct-04 23:23

parths

3-Oct-04 23:23

Another way might be to load the component with LoadLibrary[^] and call the function DllUnregisterServer[^]

"It was when I found out I could make mistakes that I knew I was on to something."
-Ornette Coleman

"Philosophy is a study that lets us be unhappy more intelligently."
-Anon.

Calling mfc dll from visual basic

randynamics1-Oct-04 15:52

randynamics

1-Oct-04 15:52

hey! i saw an article about calling an mfc dll from visual basic here... my mf dll is using sockets.... vb can see the functions i put in the dll, my problem is.. once i start to connect to the server using this command pSockCon->Connect("1.1.1.26", 777); , it doesnt connect.... i tried to run the code of the dll in an mfc application and it works fine...i can see the output from my socket workbench... i just cant figure out what is happening when vb calls my function in my dll... it cant connect to the server although it works fine when i tested it in an mfc app.. pls help me.. Sigh | :sigh:

Re: Calling mfc dll from visual basic

ThatsAlok1-Oct-04 18:24

ThatsAlok

1-Oct-04 18:24

Buddy,
according to me,you can't called a simple DlL or rather plain dll in VB application.VB support only COM dll.

-----------------------------
"I Think It Will Help"
-----------------------------
Alok Gupta
visit me at http://www.thisisalok.tk

Re: Calling mfc dll from visual basic

randynamics2-Oct-04 21:17

randynamics

2-Oct-04 21:17

Hi Mr.Gupta,

thanks for the reply...i created my dll in mfc dll. i was told that the output of mfc dll is already a COM dll... do i still have to do something to make it a COM dll for my vb app to use it?

Re: Calling mfc dll from visual basic

Gary R. Wheeler2-Oct-04 12:49

Gary R. Wheeler

2-Oct-04 12:49

You need to make sure that your DLL is performing all of the initialization required (like calling WsaStartup()). It sounds like your MFC test app may be doing things that your VB app isn't.

Another debugging tip: Put a message box in the DLL code that shows you the error values from the connect.

Software Zen: delete this;

Re: Calling mfc dll from visual basic

randynamics3-Oct-04 18:25

randynamics

3-Oct-04 18:25

hi! i'm using the CSocket class instead of the winsock... when the dll is called from an MFC dialog based app, everything works fine but not if the dll is called from vb.net...i'm trying to find some initialization that might be needed.. actually.. it cant connect to the server when called in vb app although it does connect in mfc app. there is no error with the code it just doesnt connect... Sigh | :sigh:

Using btimap resource from dll

bigmirror1-Oct-04 14:28

bigmirror

1-Oct-04 14:28

I want to use bitmap resource in dll file.
If I get bitmap resource ID, LoadLibrary and get the bitmap so
I want to draw it.
How can I do?

Re: Using btimap resource from dll

Andrzej Markowski1-Oct-04 16:43

Andrzej Markowski

1-Oct-04 16:43

Do the following steps:

CBitmap bmpYourBitmap; // your bitmap
CDC *pDC; // device context for painting
//
// 1. Create a memory device context:
CDC memDC;
memDC.CreateCompatibleDC(pDC);
//
// 2. Select your bitmap into <code>memDC</code>:
CBitmap *pOldBmp = memDc.SelectObject(&bmpYourBitmap);
//
// 3. Get the size of <code>bmpYourBitmap</code>:
BITMAP bm;
bmpYouBitmap.GetBitmap(&bm);
//
// 4. Paint the bitmap:
pDC->BitBlt(0,0,bm.bmWidth,bm.bmHeight,&memDC,0,0,SRCCOPY);
memDc.SelectObject(pOldBmp);

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