Re: how to put IP address in IP Address Control and pass it as string - C / C++ / MFC Discussion Boards

Adno10-Jul-07 7:31

10-Jul-07 7:31

hi mark, im using "WH_GETMESSAGE" one of the options here and i should be dealing with this GetMsgProc Function right?
obviously not since is not working Sigh | :sigh:

what tells you that im dealing with "keyboard hook proc", more importantly how do i fix it.
im practicing to write a dll so i want to get my head around this hooking business.

Thank You

Re: intercepting WM_CHAR message

Mark Salsbery10-Jul-07 9:43

Mark Salsbery

10-Jul-07 9:43

Lamefif wrote:
im using "WH_GETMESSAGE"

Got it. I apparently can't read Smile | :)

Your code works for me. What's going wrong on your end?

Mark

Mark Salsbery
Microsoft MVP - Visual C++

This episode brought to you by the letter Z

Re: intercepting WM_CHAR message

Adno10-Jul-07 10:18

Adno

10-Jul-07 10:18

i cleaned it up alot due to experimenting lol but this is it.
CODE

Re: intercepting WM_CHAR message

Mark Salsbery10-Jul-07 10:37

Mark Salsbery

10-Jul-07 10:37

Try this message loop:

g_KeybdHook = SetWindowsHookEx(WH_GETMESSAGE, GetMsgProc, 0,GetCurrentThreadId());
 
while (GetMessage(&msg, 0, 0, 0))
{
   TranslateMessage(&msg);
   DispatchMessage(&msg);
}
 
UnhookWindowsHookEx(g_KeybdHook);

Mark Salsbery
Microsoft MVP - Visual C++

This episode brought to you by the letter Z

Re: intercepting WM_CHAR message

Adno10-Jul-07 10:44

Adno

10-Jul-07 10:44

Thank You

ps have you any idea how to load and use .klc files done with
Microsoft Keyboard Layout Creator

Re: intercepting WM_CHAR message

Mark Salsbery10-Jul-07 10:52

Mark Salsbery

10-Jul-07 10:52

Lamefif wrote:
ps have you any idea how to load and use .klc files

No, sorry. Maybe the section "Languages, Locales, and Keyboard Layouts" here[^] will help?

Mark

Mark Salsbery
Microsoft MVP - Visual C++

This episode brought to you by the letter Z

how to put IP address in IP Address Control and pass it as string

Maynka10-Jul-07 3:30

Maynka

10-Jul-07 3:30

Hi all,
I am facing the problem.I want to put some IP address in IP address control box,store it in a string value and pass it as parameter to some function,how i will be able to that.

Regards,
Mayank

Re: how to put IP address in IP Address Control and pass it as string

David Crow10-Jul-07 4:15

David Crow

10-Jul-07 4:15

Maynka wrote:
I want to put some IP address in IP address control box...

Send the control a IPM_SETADDRESS message.

Maynka wrote:
...store it in a string value and pass it as parameter to some function,how i will be able to that.

You first must get the value from the control by sending it a IPM_GETADDRESS message.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Problem with SetWindowsHookEx()

sumd10-Jul-07 2:50

sumd

10-Jul-07 2:50

Dear All,

Im trying keyboard locking with SetWindowsHookEx()api.
It works fine. But the problem is that after some time it
automatically unhooks and unlocks the keyboard before a call to UnhookWindowsHookEx()is made.

Thanks,
Sumedh

Thank You

Re: Problem with SetWindowsHookEx()

Perspx10-Jul-07 5:45

Perspx

10-Jul-07 5:45

Can you place the code in your message?? That might help.

--PerspX

"Nowadays, security guys break the Mac every single day. Every single day, they come out with a total exploit, your machine can be taken over totally. I dare anybody to do that once a month on the Windows machine." - Bill Gates

Re: Problem with SetWindowsHookEx()

sumd11-Jul-07 0:27

sumd

11-Jul-07 0:27

Hi,

This is my code for keyboard locking.
Please check it out..

Thanks in advance,
Bye.

HHOOK hKeyboardHook = NULL;
void StartHook()
{
HMODULE hMod = NULL;
hMod = LoadLibrary("LockScr.dll");

if (hMod != NULL)
{
hKeyboardHook = NULL;
hKeyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL,
(HOOKPROC)GetProcAddress(hMod,"KeyProc"),hMod,0);

if(hKeyboardHook != NULL)
{ MessageBox("SetWindowsHookEx OK");}
}
FreeLibrary(hMod);
}

void Unhook()
{
UnhookWindowsHookEx(hKeyboardHook);
}

/*** This Is the Code from DLL ***/

LRESULT LOCKSCR_API CALLBACK KeyProc(int nCode, WPARAM wParam, LPARAM lParam)
{
if (nCode >= 0)
{ PostMessage(NULL,WM_USER+765,wParam,lParam);}

return nCode < 0 ? CallNextHookEx(NULL,nCode, wParam, lParam) : -1;
}

Thanks
Sumedh

Re: Problem with SetWindowsHookEx()

Perspx11-Jul-07 5:45

Perspx

11-Jul-07 5:45

Hmm.. I'm not too sure sorry Sigh | :sigh:

Why do you call FreeLibrary() after you set the hook? surely this will mean that you wont be able to unhook the hook after this as the DLL is no longer loaded into or associated with the application..

Apart from this everything seems to be OK, my LL keyboard hooking code looks almost identical to this..

Sorry I can be of no further help

--PerspX

RegSetValueEx

Yashusid10-Jul-07 2:48

Yashusid

10-Jul-07 2:48

Hello,

I have one command line application, where i am setting registry key values .

LPCTSTR lpResName=GetSourceName(RegFileName);
rCode=RegSetValueEx(
hDckey,
lpResName,
0,
REG_SZ,
(LPBYTE)RegFileName,
(DWORD) (lstrlen(RegFileName)+1)*sizeof(TCHAR) );

This RegSetValueEx sets the values in the registry if i run this exe in "Debug" mode setting lpResName correctly, but if i run in the "Release" mode the "Value Name" for hDckey is some garbage. whereas "Value Data" is correctly set in both the Modes.

the GetSourceName returns the correct value for lpResName in both modes.

what may be the problem with this ?
please help me...

Re: RegSetValueEx

David Crow10-Jul-07 3:07

David Crow

10-Jul-07 3:07

If the first argument to RegSetValueEx() is garbage, that means the key was not opened correctly.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: RegSetValueEx

Yashusid10-Jul-07 3:12

Yashusid

10-Jul-07 3:12

not any of the parameters are garbage, after executing this, if i see in the registry the "Value name" is garbage. that too it will set the "Value Name" if i run in "Debug" mode, the problem is there only if i make the exe in "Release" mode.

Re: RegSetValueEx

David Crow10-Jul-07 3:18

David Crow

10-Jul-07 3:18

Yashusid wrote:
not any of the parameters are garbage,

Then why would you state, "the 'Value Name' for hDckey is some garbage?" If none of the arguments being passed to RegSetValueEx() contain garbage, then what exactly is the problem? Confused | :confused:

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: RegSetValueEx

Yashusid10-Jul-07 3:23

Yashusid

10-Jul-07 3:23

oops sorry if it created confusion....my intention was to convey that...

i have a key...for that key i am setting a property...

my registry entry for key

when u see in registry

Name ------------ Type ----Data
(garbage here)--- REG_SZ -- test.xml --> ------Release mode
test--------------REG_SZ -- test.xml --> ------Debug mode

i am getting garbage in Name field for the key...

Re: RegSetValueEx

David Crow10-Jul-07 4:13

David Crow

10-Jul-07 4:13

Yashusid wrote:
i am getting garbage in Name field for the key...

Which would indicate that lpResName is wrong. Try:

TCHAR s[128];
_tcscpy(s, GetSourceName(RegFileName));
rCode = RegSetValueEx(hDckey,
                      s,
                      0,
                      REG_SZ,
                      (LPBYTE) RegFileName,
                      (DWORD) (_tcslen(RegFileName) + 1) * sizeof(TCHAR));

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: RegSetValueEx

Yashusid10-Jul-07 4:26

Yashusid

10-Jul-07 4:26

You are great!!!

Thanks a lot!!!
It works........

but please help me in understaning why it was setting correctly in "Debug" mode ?

Re: RegSetValueEx

David Crow10-Jul-07 4:30

David Crow

10-Jul-07 4:30

Yashusid wrote:
but please help me in understaning why it was setting correctly in "Debug" mode ?

It's not. You just got lucky. Read here for the differences in the two.

You should now be concerned as to what GetSourceName() is doing (wrong). If the code is short enough, post it and we can take a look.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: RegSetValueEx

Yashusid10-Jul-07 4:34

Yashusid

10-Jul-07 4:34

In GetSourceName i am parsing a XML file.

char *GetSourceName(char *RegFileName)
{
LPTSTR lpstrMsg;
CoInitialize(NULL);
CComPtr<ixmldomdocument> spXMLDOM;
CComPtr<ixmldomnode> spXMLNode;
IXMLDOMAttribute *pIXMLDOMAttribute = NULL;
IXMLDOMElement *pIXMLDOMElement = NULL;
HRESULT hr = spXMLDOM.CoCreateInstance(__uuidof(DOMDocument));
VARIANT_BOOL bSuccess = false;
USES_CONVERSION;
_variant_t fileNameValue=T2W(RegFileName);
hr = spXMLDOM->load(fileNameValue,&bSuccess);
if(!hr)
{
hr = spXMLDOM->get_documentElement(&pIXMLDOMElement);
_variant_t nameValue;
if(!hr)
{
hr = pIXMLDOMElement->getAttribute(CComBSTR(L"source-name"),&nameValue);

}
if ( nameValue.vt == VT_BSTR )
{
USES_CONVERSION;
lpstrMsg = W2T(nameValue.bstrVal);
}
}

spXMLDOM.Release();
CoUninitialize();
return lpstrMsg;
}

Re: RegSetValueEx

David Crow10-Jul-07 4:48

David Crow

10-Jul-07 4:48

The memory that lpstrMsg points to is no longer valid when GetSourceName() goes out of scope. Return a CString or string object instead. Or you could leave it as is, and make the appropriate change to all places that use GetSourceName().

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: about "round" function in visual C++

SandipG 10-Jul-07 2:27

SandipG

10-Jul-07 2:27

This is a weird solution.. you might be aware of this.
here Format will automatically round the value.
Here advantage is you can specify decimal places you are interested in. accordingly format will round values after that decimal place.

CString str;
double d=1.516;
str.Format("%0.2lf",d);

Re: about "round" function in visual C++

Russell^'10-Jul-07 3:10

Russell^'

10-Jul-07 3:10

inline double round(double x){
	const double y = floor(x);
	if(x-y<0.5) return y;
	else return y+1;
}

Do not use casting to int if x is very big, because int value range is smaller than double range.

I don't know if it is possible to implement this function in a faster way, but i use it and it work propely.

Russell

OLEDB WITH .CDX

ArielR10-Jul-07 2:23

ArielR

10-Jul-07 2:23

I'm moving datas from old dbf files. But now a need to access them but the perform of "select * from dbftable for xCond" command is too slow. How can I access its file with the CDX index?. I'm using oledb and VC++ 6.

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