C / C++ / MFC

Re: Keyboardhook and Hotkey?

15-Jan-03 14:33

Anthony B. wrote:
Visual Studio Installer Project

in VS .Net? try posting in the .net forum.

- Nitron

"Those that say a task is impossible shouldn't interrupt the ones who are doing it." - Chinese Proverb

Keyboardhook and Hotkey?

Aidman15-Jan-03 3:43

Aidman

15-Jan-03 3:43

hi all,

I have heard that you must use an dll for the windows keyboard hook apis to work in Win2000/XP in a global state, is that correct? If so then why? Confused | :confused:

Is there any other way to "hide" or prevent applications from recieving keystroke messages? If so then how? Confused | :confused:

Does hotkey apis prevent messages and must they always use combined keys like ctrl+..., alt+... or shift+...? Confused | :confused:

I thank you for any reply Smile | :)

Aidman » over and out

Dudi Avramov15-Jan-03 4:42

Dudi Avramov

15-Jan-03 4:42

In order to have system-wide keyboard hooking, you should work with SetWindowsHookEx win32 API.
Your code should be a dll since the operating system injects the dll to every running process.

Cstring to char*

citroen15-Jan-03 3:36

citroen

15-Jan-03 3:36

hi,
I need to send to a serial port a char*.
I am accepting the data through an edit box ==> CString.
I tried to convert the string through lstrcpy( )
from CString to char*, but when comparing the char* string whith an "identical" char* I got NULL. I had in both strings '\n' .
thanx

Moshe

Nitron15-Jan-03 3:52

15-Jan-03 3:52

Try:

CString s = "Test";
char* ch = static_cast<char*>(s.GetBuffer(0));

- Nitron

"Those that say a task is impossible shouldn't interrupt the ones who are doing it." - Chinese Proverb

citroen15-Jan-03 6:05

citroen

15-Jan-03 6:05

I tried the following:

CString s = "Test";
char* ch = static_cast<char*>(s.GetBuffer(0)), *test="Test";
int d = ( ch == test);
ch = test;
d = ( ch == test );

the first d is 0 and the second 1. so the arn't really equal
even though they seem so!!!

Nitron15-Jan-03 6:36

15-Jan-03 6:36

citroen wrote:
the first d is 0 and the second 1. so the arn't really equal
even though they seem so!!!

Dead | X|

NO! NO! NO!
don't confuse yourself! Read my article on Pointers[^] and you'll see why ch != test. Actually, they'd better not be equal!

Download the demo project, and go over the article. It will hopefully enlighten you! I understand how confusing it can be at first, trust me. Poke tongue | ;-P

Let me know what you find out, and tell me why they are not equal.

- Nitron

"Those that say a task is impossible shouldn't interrupt the ones who are doing it." - Chinese Proverb

citroen15-Jan-03 21:34

citroen

15-Jan-03 21:34

First, thanx.
It works. Big Grin | :-D

so they will be equal I should have written:
*ch==*test; to dereference them.

thanx again
Moshe

Nitron16-Jan-03 3:17

16-Jan-03 3:17

citroen wrote:
so they will be equal I should have written:
*ch==*test; to dereference them.

Cool | :cool:

You are exactly right! Big Grin | :-D

[happy-cry] sniff... sniff... I'm so proud... [/happy-cry] Poke tongue | ;-P

- Nitron

"Those that say a task is impossible shouldn't interrupt the ones who are doing it." - Chinese Proverb

How can I get application path ?

Michael Dunn15-Jan-03 7:17

Michael Dunn

15-Jan-03 7:17

See How do I convert a CString to a char*?[^]

--Mike--
I'm bored... Episode I bored.
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My really out-of-date homepage
Sonork-100.19012 Acid_Helm

AhMan15-Jan-03 3:20

AhMan

15-Jan-03 3:20

How can I get application path ?

such as I want to get icq path,acrobat path,...;

How should I do (Howto or Library) ?

Thank you for your kindness.

Re: How can I get application path ?

AllanK15-Jan-03 4:54

AllanK

15-Jan-03 4:54

The way I solved this was to call GetEnvironmentVariable and ask for the 'path' variable. Here's an MFC code snippet:

<code>
    DWORD dwPathLen = GetEnvironmentVariable("path", NULL, 0);
    CString csCurrentPath;
    DWORD dwPathLenVerify = GetEnvironmentVariable("path", 
                              csCurrentPath.GetBuffer(dwPathLen), dwPathLen);
    ASSERT(dwPathLenVerify == (dwPathLen - 1));
    csCurrentPath.ReleaseBuffer();</code>

The only MFC thing about it is the GetBuffer call, which you could easily remove.

get the ip address

summo15-Jan-03 2:47

15-Jan-03 2:47

I am using winsock application. i am making the client server application. I want to get the ip address and port of the client connecting to my server socket. I am already using the function getpeername() but it is not working please help me.

Reply me soon

AlexO15-Jan-03 3:05

AlexO

15-Jan-03 3:05

When you do accept, why don't you use the second parameter? read msdn about "WSAAccept" and pay attention to "ATM_CALLING_PARTY_NUMBER_IE" (I suspect that is why your getpeername call fails).

summo15-Jan-03 3:26

15-Jan-03 3:26

Thanx 4 guidence but we r simply using simple sockets not ATM based sockets. Is there any other function to get the information(e.g IP,Port no)of the client attached. Can u plz provide us with some helping code for proper understanding as we r beginners.

Reply me soon

AlexO15-Jan-03 4:24

AlexO

15-Jan-03 4:24

Well, from what I just read this is provider specific.
What network are you using?
What is the error code (see error hadling example MSDN "IPv6-Enabled Client Code")?

summo15-Jan-03 19:24

15-Jan-03 19:24

Well I am using LAN(ethernet) with an OS Windows Xp. The exact thing that is happening is when I get the port no by
(getpeername), I receive junk not the exact port no and the junk value changes whenever the program is restarted. U can have a better idea of it by viewing the code. Plz help me out.

getpeername(ClientSock,
(struct sockaddr *) &accept_sin,
(int *) &accept_sin_len);

short x=accept_sin.sin_port;
m_port=x;
UpdateData(false);
MessageBox (x, TEXT("family"), MB_OK);

Reply me soon

geo_m15-Jan-03 8:15

geo_m

15-Jan-03 8:15

Having not enough info to say directly. But if you accept your sockets through AcceptEx there is only one way how to get the socket info as the getpeername() doesn't work anymore after AcceptEx.

If this is your case, look at the GetAcceptExSockaddrs function, this is a way how to handle it.

summo15-Jan-03 19:26

15-Jan-03 19:26

Well I am using "accept" to make connection. The exact thing that is happening is when I get the port no by(getpeername), I receive junk not the exact port no and the junk value changes whenever the program is restarted. U can have a better idea of it by viewing the code. Plz help me out.

getpeername(ClientSock,
(struct sockaddr *) &accept_sin,
(int *) &accept_sin_len);

short x=accept_sin.sin_port;
m_port=x;
UpdateData(false);
MessageBox (x, TEXT("family"), MB_OK);

Reply me soon

geo_m15-Jan-03 21:19

geo_m

15-Jan-03 21:19

Don't know if this is exact solution for your problem - problem is that in TCP/IP the numbers are in network byte order - this is OK for some big machines, but for Intel you have to switch the order (this is the Little/Big endian problem).

so the code should looks like:

<br />
getpeername( ClientSock, (sockaddr*)&accept_sin, (int*)&accept_sin_len);<br />
<br />
short port = ntohs( accept_sin.sin_port );<br />
...<br />

the same will be later on for the address...

Version number

pranavamhari15-Jan-03 2:21

pranavamhari

15-Jan-03 2:21

hi all,
i want to use the version number system
major.minor.patch.build
for my software.

Should i reset the build count to 0 (zero) if i increment the minor or major version ? Or should i just keep the build number as it is ?

I know there are no strict rules. But.. just to be professional...

thanks in advance

Hari Krishnan

Re: Version number

Nitron15-Jan-03 3:44