C / C++ / MFC

28-Sep-05 11:12

This has got to be so obvious I cannot see it. Consider a sample code snippet:

.
.
.
CMyDialog myDlg(currentWindow);
myDlg.doModal();
.
.
.

Okay, if I have current window, how do I determine the immediate child that it is managing? If I had myDlg, I'd just say GetParent or some such call..... there has to be a direct hook. I've tried the GetWindow calls, but I'm iterating all over the place, and I don't want to do that, I just want the one immediate child. I know it is there.

frustrated

C. Gilley
Will program for food...
My son's PDA is an M249 SAW.

douglasjordan28-Sep-05 11:31

28-Sep-05 11:31

Will the EnumChildWindows function work for you? Perhaps the order the window handles are returned will be the z order and you can take the first?

charlieg28-Sep-05 12:14

28-Sep-05 12:14

I thought about going that route and promptly started deleting sibling windows rather than the children. What I did was use GetWindow, but this marched through top level windows. It seems absurd to me that that I simply reference the parent of a window but not the immediate child.

C. Gilley
Will program for food...
My son's PDA is an M249 SAW.

douglasjordan28-Sep-05 12:16

28-Sep-05 12:16

You could add a WM_USER function to the dialog code so that it can respond with its own handle. Then just post a broadcast message to get the handle from your window.

charlieg28-Sep-05 12:40

28-Sep-05 12:40

Okay, another good suggestion which leads me to believe that there is no direct access to what should be already there?

C. Gilley
Will program for food...
My son's PDA is an M249 SAW.

douglasjordan28-Sep-05 12:43

28-Sep-05 12:43

If the window was created by the parent why would you not have its handle?

charlieg28-Sep-05 12:57

28-Sep-05 12:57

An excellent question! In this case, I have a stack of dialogs:

Frame -> A
A -> B
B -> C and so on.

The frame window knows about A but not about B (in the pure sense of the discussion). If I want to be able to walk down the tree, I would think I go do so in a fashion as in using GetParent(). Having said all that, I know there are workarounds, and you have provided a good one. My question was more of a rant than anything else (being honest here).

For example, I could have each dialog save it's immediate child, and walk it in an application fashion. Just seems redundant to me.

C. Gilley
Will program for food...
My son's PDA is an M249 SAW.

Jose Lamas Rios28-Sep-05 18:49

Jose Lamas Rios

28-Sep-05 18:49

Shouldn't GetWindow(hWnd, GW_CHILD) work?

--
jlr
http://jlamas.blogspot.com/[^]

charlieg29-Sep-05 0:53

29-Sep-05 0:53

sigh - 4th time I've tried to reply....

You would think that it would, but the GetWindow does not distinguish (in my limited testing) between windows, it just gets one that matches it's criteria. So I found myself grabbing windows on the dialog that had nothing to do with the entire sub-dialog I just created....

C. Gilley
Will program for food...
My son's PDA is an M249 SAW.

Re: get html from the net

S Douglas28-Sep-05 23:05

S Douglas

28-Sep-05 23:05

Not sure this will be entirely helpful given the circumstance. Unsure | :~

http://support.microsoft.com/default.aspx?scid=kb;en-us;131994[^]

However, if the Frame knows of 'A' the you could have Frame tell A to close its child 'B', before 'B' closes it could close any childs it has so on and so forth.

If you want to close the top most window, have you tried CWnd::GetActiveWindow?

DEBUGGING : Removing the needles from the haystack.

long double...

Link260028-Sep-05 7:10

Link2600

28-Sep-05 7:10

Hi,

Is long double ANSI-stand legal data type? I thought short and long only apply to int?

On VS.Net /w WinXP, the sizeof(long double) returns 8,
on GCC4 /w FC4 Linux, the sizeof(long double) returns 12,
on GCC4 /w MacOS X (G4), the sizeof(long double) returns 16.

Why would every different OS return different values?

Thanks

Re: long double...

Christian Graus28-Sep-05 7:38

Christian Graus

28-Sep-05 7:38

I believe the standard sets MINIMUM sizes for types. For example, in VC6 at least int and long were the same thing, both were the minimum acceptable size for a long.

I don't know if long double is standard or not, but that's the answer to your other question, anyhow.

Christian Graus - Microsoft MVP - C++

Re: long double...

toxcct28-Sep-05 21:14

toxcct

28-Sep-05 21:14

see this[^] discussion...

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Re: long double...

Link260030-Sep-05 2:19

Link2600

30-Sep-05 2:19

I've read the discussion, but I still don't understand why would different OS produces different result.

For example, both my intel-P4-based PC and PowerPC-based MacOS X run GCC 4, and the result on the Linux is 12 and MacOS X is 16. Both are 32-bit processors and 32-bit OS (Macs uses the G4, not G5).

get html from the net

hamavreg228-Sep-05 6:53

hamavreg2

28-Sep-05 6:53

i need to "scan" some sites and to get some text out of the html code
my question is what is the best and the fastest way to do it
i tried to us wininet but it very slow
and i need that the scan will work fast
what can i do?

vikas amin28-Sep-05 23:12

vikas amin

28-Sep-05 23:12

i used CHtmlView class, as i had to display
some site ,where i use to search the code
for small data ,
But cant say it will be faster ......
U can get the TCP/IP packet & get the
data from the packet .

Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com

crash on the end of release mode

valerie9928-Sep-05 4:15

valerie99

28-Sep-05 4:15

morning,

this app runs fine on debug mode, but got access violation at the exiting dialog in release, I checked the thread, it was trying to close [CCallsmDbf::~CCallsmDbf]....here is part of the code that causing problem, but I am not sure what need to be fixed, thanks!

CCallsmDbf::CCallsmDbf(char *dbfname, int exclusive)
: CB_DBF_NTX(dbfname, exclusive)
{
if (validDBF())
{
ptrIdxName = m_csIdxFile.GetBuffer( L_tmpnam + 1 );
GetTempFileName( ".", "callsm", 0, ptrIdxName );
index_on( ptrIdxName, "ANI" );
m_csIdxFile.ReleaseBuffer();
top();

BindFieldOrdinals();
}
}

CCallsmDbf::~CCallsmDbf()
{
}

in header file,
protected:
CString m_csIdxFile;
char* ptrIdxName;

Re: crash on the end of release mode

carks28-Sep-05 6:04

carks

28-Sep-05 6:04

Hi,

ptrIdxName = m_csIdxFile.GetBuffer( L_tmpnam + 1 );

This line looks dangerous! L_tmpnam may not be initialized.
which would assign an unpredictable amount of mem. in release mode.
The memory pointed to by ptrIdxName might easily be corrupted by the
"GetTempFileName" call on the next line... the problem might only manifest itself when the class destructor deallocates the memory at object destruction time.

Why not try a simpler way of doing this instead of GetBuffer/ReleaseBuffer like...

TCHAR filename[MAX_PATH];
GetTempFileName( ,,, filename );
m_csIdxFile = filename;

Cheers,

Dave

Thanks. I've tried your suggestion

valerie9928-Sep-05 10:58

valerie99

28-Sep-05 10:58

But it's still crashes at the same spot.

when the access violation message show up, there were two threads [CCallsmDbf::~CCallsmDbf] and [CDialog::EndDialog], I gess the problem could be at the CDialog as well....

and it's not crash every single time of on release mode, every now and then it works......

thanks for your time!

Re: Thanks. I've tried your suggestion

prasad_som28-Sep-05 19:28

prasad_som

28-Sep-05 19:28

Problem could be still suggested by Dave. I think one or more extra bits are accessed somewhere.
Try to keep track of character pointer used.
use strcpy() wherever needed, and with care

Here is another part of code

valerie9929-Sep-05 3:54

valerie99

29-Sep-05 3:54

thanks for your info, here is another function that from same file, somehow, it's done deifferently.....

CFavNatDbf::CFavNatDbf(int exclusive)
: CB_DBF_NTX("DATA\\FAVNAT.DBF", exclusive)
{
if (validDBF())
{
char* ptrIdxName = m_csIdxFile.GetBuffer( L_tmpnam + 1 );
GetTempFileName( ".", "favnat", 0, ptrIdxName );
_strupr( ptrIdxName );
memmove( ptrIdxName, ptrIdxName + 2, strlen( ptrIdxName ) - 2 );
*strstr( ptrIdxName, ".TMP" ) = '\0';
index_on( ptrIdxName, "CUST_NUM + LOCATION" );
m_csIdxFile.ReleaseBuffer();
top();

BindFieldOrdinals();
}
}

CFavNatDbf::~CFavNatDbf()
{
}

void CFavNatDbf::BindFieldOrdinals()
{
}

Security Certificate Store(CertOpenStrore)

sunit528-Sep-05 3:56

sunit5

28-Sep-05 3:56

I am programming a Socket enabled with SSL.I want to get certificate from a store provider.my certificate provider is a file.i downloaded the openssl and installed it.i used a command to generate certifcate request

openssl>req -newkey rsa:1024 -keyout server.key -nodes -days 365 -out server.crt<br />

with this command a certificate request (server.crt) is generated.i opened the server.crt and pasted it contents in Advance option (certificate service) to get the certificate.i got a certificate named as"certnew.cer".i opened the certificate ,there was an option "copy to file".i opted for PKCS#7 Certificates(.P7B) and named it FileStore.A file was generated named as Filestore.p7b

//this my code for certificate store

#define ENCODING_TYPE  (PKCS_7_ASN_ENCODING | X509_ASN_ENCODING)<br />
<br />
HCERTSTORE      m_hMyCertStore;//handle to  certificate     store<br />
<br />
m_hMyCertStore = CertOpenStore(<br />
									     CERT_STORE_PROV_FILENAME_A,// define the store         provider type,here it is a             //file on disk.<br />
									     ENCODING_TYPE,// encoding type for certificate & message<br />
									     NULL,	// choose a default CSR.<br />
									     NULL,    //default flag<br />
								          _T("FileStore.p7b")); //The name of an existing file<br />

i want to know whether my procedure is right to get the certificate from store.because i m getting error when i want
credentials for schannel

-- modified at 1:14 Thursday 29th September, 2005

PowerPoint Device Context Hook?

douglasjordan28-Sep-05 3:55