C / C++ / MFC

Re: How to catch keyboard event before the operation system ?

14-Oct-06 5:21

I need to catch every keyboard event before operation system ( windows xp ) does.

What i mean is in case user click on key 'enter' ( or every other key ) my application need to check if the key is 'X' key - and in any case this key event need to continue as key event to the operation system.

I'm sure there is some win32 API function to do it - but i don't remember it.

Someone can help me ?

Thanks.

Sceptic Mole14-Oct-06 10:44

Sceptic Mole

14-Oct-06 10:44

Yanshof wrote:
I need to catch every keyboard event before operation system ( windows xp ) does.

Yanshof wrote:
I'm sure there is some win32 API function to do it - but i don't remember it.

Do you see a contradiction between those 2 sentences??

Re: How to catch keyboard event before the operation system ?

Yanshof14-Oct-06 22:49

Re: How to catch keyboard event before the operation system ?

14-Oct-06 22:49

Sorry ... but i don't see any contradiction.

I need some way to catch keyboard event - something like keyboard logger.

I did not found something useful in Google until now.

Thanks for any help.

Diagon Alley16-Oct-06 20:34

Diagon Alley

16-Oct-06 20:34

Hi! Will this [^]help?

--------------------------------------------------------------------
If you need a hammer get C and shut up. If you need a nail gun get C++ and shut up. If you don't need *those* things (and good design should tell you) then by all means get a factory, factory, factory.

--code-frog@codeproject

Why use Dll ?

Yanshof16-Oct-06 21:32

Problem with using class wincrypt.h

16-Oct-06 21:32

Why do not use the Hook in the code and beside this - why thay use in this example DLL ?

Yanshof14-Oct-06 1:55

14-Oct-06 1:55

Hi All,

I need to use the class wincrypt.h with some of my application that i writing.
I try to compile the application but all the object and function of this class is are not recognize by my compiler.

I even try to get demo application from here :

http://www.codeproject.com/cpp/cryptest.asp[^]

but my compiler repeat the message "undeclared identifier".

Some one can help me ?

Thanks.

Waldermort14-Oct-06 2:04

14-Oct-06 2:04

What is the error you are getting?

Yanshof14-Oct-06 2:19

14-Oct-06 2:19

Unidentified of the function and variables of this library.

cryptest\md5capi.cpp(47) : error C2065: 'HCRYPTPROV' : undeclared identifier
cryptest\md5capi.cpp(47) : error C2146: syntax error : missing ';' before identifier 'hCryptProv'
cryptest\md5capi.cpp(47) : error C2065: 'hCryptProv' : undeclared identifier
cryptest\md5capi.cpp(48) : error C2065: 'HCRYPTHASH' : undeclared identifier
cryptest\md5capi.cpp(48) : error C2146: syntax error : missing ';' before identifier 'hHash'
cryptest\md5capi.cpp(48) : error C2065: 'hHash' : undeclared identifier
cryptest\md5capi.cpp(55) : error C2065: 'CryptAcquireContext' : undeclared identifier
cryptest\md5capi.cpp(56) : error C2065: 'PROV_RSA_FULL' : undeclared identifier
cryptest\md5capi.cpp(56) : error C2065: 'CRYPT_VERIFYCONTEXT' : undeclared identifier
cryptest\md5capi.cpp(56) : error C2065: 'CRYPT_MACHINE_KEYSET' : undeclared identifier
cryptest\md5capi.cpp(59) : error C2065: 'CryptCreateHash' : undeclared identifier
cryptest\md5capi.cpp(60) : error C2065: 'CALG_MD5' : undeclared identifier
cryptest\md5capi.cpp(63) : error C2065: 'CryptHashData' : undeclared identifier
cryptest\md5capi.cpp(66) : error C2065: 'CryptGetHashParam' : undeclared identifier
cryptest\md5capi.cpp(66) : error C2065: 'HP_HASHVAL' : undeclared identifier
cryptest\md5capi.cpp(89) : error C2065: 'CryptDestroyHash' : undeclared identifier
cryptest\md5capi.cpp(90) : error C2065: 'CryptReleaseContext' : undeclared identifier

Waldermort14-Oct-06 2:34

14-Oct-06 2:34

Looks like you have forgot to include a header file in your project. Search the header files for the definition of HCRYPTPROV, than add the #include statement to the top of your md5capi.cpp file.

Yanshof14-Oct-06 2:59

14-Oct-06 2:59

I did not forgat include this file.
This is the first thing that i check - and its not it.

Hamid_RT14-Oct-06 3:41

Hamid_RT

14-Oct-06 3:41

Did you include Wincrypt.h?

WhiteSky

Yanshof14-Oct-06 3:46

14-Oct-06 3:46

yes

Hamid_RT14-Oct-06 4:17

Hamid_RT

14-Oct-06 4:17

I see this program and compile it,it doesnt show any error to me Im using Vs2003

WhiteSky

Yanshof14-Oct-06 4:27

14-Oct-06 4:27

But i using Vs6....

Someone can help me here ?
I dont have any clue how to fix this problem.

Hamid_RT14-Oct-06 4:35

Hamid_RT

14-Oct-06 4:35

See this[^] site I think its helpful for you

WhiteSky

S Douglas14-Oct-06 22:32

S Douglas

14-Oct-06 22:32

Yanshof wrote:
but my compiler repeat the message "undeclared identifier".

Have you read through the message board on that article? You will need to install the latest SDK from Microsoft, Windows® Server 2003 R2 Platform SDK Full Download[^] the referenced header was not shipped with VS 6.0.

I'd love to help, but unfortunatley I have prior commitments monitoring the length of my grass. :Andrew Bleakley:

The window Region

Waldermort13-Oct-06 23:30

13-Oct-06 23:30

It's hard to tell if my code is at fault or my graphics card just isn't fast enough, but I'm having some serious flickering issues. I have skinned a window (again), but this time I have enabled resizing. The skin has rounded corners, so as we all know we have to call SetWindowRgn() to create a rounded window.

Problem is, when calling this from WM_SIZE and when the size is being expanded, for a split second it appears as if the window region is moved but not expanded causing a flicker across the bottom and/or left border. This only happens when the top or left borders are being dragged.

I have noticed the same problem with the explorer windows, which are also rounded. But the window appears to rectify itself much faster than my bitmap heavy window.

Has anybody else come across a similar problem and/or managed to resolve it or reduce the flickering? Also, please try doing the same with an explorer window and let me know if you also notice a flicker.

Re: The window Region

Shog⁹14-Oct-06 5:30

Shog⁹

14-Oct-06 5:30

A few places to look (in order!):

Avoid erasing the background prior to redrawing - handle WM_ERASEBKGND
Avoid changing the window region when the size hasn't changed - in WM_SIZE, store a copy of the current size, and when it's called again, check to make sure the size has actually changed before setting a new region.
Check the speed of your drawing code. Temporarily replace it with something simple (but not too simple), like a pattern fill. If the flicker disappears, you probably need to work on optimizing your code.

every night, i kneel at the foot of my bed and thank the Great Overseeing Politicians for protecting my freedoms by reducing their number, as if they were deer in a state park. -- C^hris L^osinger, Online Poker Players?

Re: The window Region

Waldermort14-Oct-06 7:49