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Hi,
I need to create about three to four modal dialog boxes such that when a button is pressed in the first one it leads to the next and again when a button is pressed in this it leads to the next one and so on..I am a novice in this field and I need some help in this. I tried this:
void CNewoneDlg::OnOK()
{
CDialog aboutDlg(IDD_DIALOG1);
INT_PTR pRet=-1;
aboutDlg.DoModal();
//CDialog::OnOK(); (I tried taking this off...but didnt work either)
}
This works..it leads to the next dialog box on pressing ok..
but..
void CDialog1Dlg::OnOK()
{
CDialog aboutDlg(IDD_DIALOG2);
INT_PTR pRet=-1;
aboutDlg.DoModal();
//CDialog::OnOK();
}
This doesnt lead to the next dialog box on pressing ok..I am confused, since I have used the method in the earlier function..when that can work, why cant (isnt) this?
I desperately need a help..
THANKS
Deepak Samuel
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how do i cast a cstring to bstr?
and from a bstr to cstring..
thanks
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Make BSTR from CString:
Use either CString member function BSTR AllocSysString ( ) const; or BSTR SetSysString( BSTR* pbstr ) const;.
And the other way, I don't really know, but perhaps a simple '=' is enough?
CString strBla = bstrString; ?
-Dominik
_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do?? 
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Thanks people...you are great people to have around..
it worked! 
kindest regards
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Well, there are no casting routines.
But you can use these conversion methods of CString:
CString to BSTR: AllocSysString
BSTR to CString : SetSysString
Or you use the _bstr_t class declared in <comdef.h>,
which is very comfortable.
Jens
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Hi,
I use vector of pointers to my class to store data. I insert them using push_back(). Here is my function for inserting data into vector:
[code]
UINT CVirtualLWItemManager::insertItem(LS_item* pNewItem)
{
// check if current capacity is enough
if (m_vecItems.size() > m_vecItems.capacity())
{
AfxMessageBox("m_vecItems.size() > m_vecItems.capacity()");
return 0;
}
if (m_vecItems.size() == m_vecItems.capacity())
{
// enlarge array
m_vecItems.reserve(m_vecItems.capacity() + 128);
// try again
return insertItem(pNewItem);
}
m_vecItems.push_back(pNewItem);
return 1;
}
[/code]
Here is my function that launches std::sort():
[code]
void CVirtualLWItemManager::sortItems(INT (*sort_cb)(LS_item*, LS_item*))
{
std::sort(m_vecItems.begin(), m_vecItems.end(), sort_cb);
}
[/code]
And here is my static sorting callback function:
[code]
INT CMyFileView::sortCallback(LS_item* pDataFirst, LS_item* pDataSecond)
{
ITEM_DESC* param1 = NULL;
ITEM_DESC* param2 = NULL;
param1 = (ITEM_DESC*) pDataFirst->lParam;
param2 = (ITEM_DESC*) pDataSecond->lParam;
INT iSortColumn = 0;
if (getDoc()->iViewToSort == 1)
iSortColumn = getDoc()->SortingColumnLeft;
else
iSortColumn = getDoc()->SortingColumnRight;
// Nejdrive (..), pak adresar, dale soubor
if (param1->folder > param2->folder)
return -1;
else if (param1->folder < param2->folder)
return 1;
// Trizeni podle zvoleneho sloupce
switch (iSortColumn)
{
// ASCENDING
case 0: // Podle nazvu souboru a adresaru
return param1->name.CompareNoCase((LPCTSTR) param2->name);
case 1: // Podle velikosti
if(param1->size < param2->size)
return -1;
if(param1->size > param2->size)
return 1;
break;
case 2: // Podle data
if (param1->date < param2->date)
return -1;
if (param1->date > param2->date)
return 1;
break;
// DESCENDING
case 3: // Podle nazvu souboru a adresaru
return (param1->name.CompareNoCase((LPCTSTR) param2->name)) * -1;
case 4: // Podle velikosti
if (param1->size < param2->size)
return 1;
if (param1->size > param2->size)
return -1;
break;
case 5: // Podle data
if (param1->date < param2->date)
return 1;
if (param1->date > param2->date)
return -1;
break;
}
return 0;
}
[/code]
The problem is, sometimes pDataSecond parameter passed to this function has invalid parameter, eg. 0xfdfdfdfd.
How is it possible?
Objects that are inserted to the vector are created on the heap.
Thank you a lot for any suggestion.
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At first sight, there're two problems with your code. The first one is not critical, but anyway: The comparison
if (m_vecItems.size() > m_vecItems.capacity()) is always false, so there's no point in checking it. By definition, the size of a vector canot be larger than its capacity. As for
if (m_vecItems.size() == m_vecItems.capacity()) it is not really necessary (vectors grow as necessary automatically), but it can improve performance, so no problem about it.
The real problem (I guess) is that sort expects a comparison predicate that has less-than semantics, i.e. it expects it to return true is the first argument if less than the second, and false otherwise. Your sortCallback has (<0,0,>0) semantics: change it to what I've indicated and things will probably start to work OK. Good luck.
Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo
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It works! I just changed return value of the sorting callback from INT to bool, and replaced 1, -1, 0 with true and false and it's ok now.
Thank you Joaquín, you helped me very much!
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How to detect that your PC system has USB version 1.1 or 2.0 using Visual C++? Thank you very much
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Did you know that the standards committee wants to allow makers of USB 1.1 products to rename their product to be USB 2.0 without adding support for the faster speeds? I am not sure how this will affect your results but I wanted to inform you of this. I'll try to find the links..
Here is part of the article on the register (www.register.com):
The trade group responsible for marketing the USB peripheral interface has the older given 1.1 specification a speed-boost -simply by changing its name.
Of course 1.1, superseded by the much speedier 2.0 specification, hasn't really got any faster. But the USB Implementors Forum (USB-IF) has decided that vendors can describe USB 1.1 ports as USB 2.0 ports.
Now they can describe the old specification as "Full Speed" and the newer, 2.0 specification as "High Speed." The Bangkok Post notes that this puts vendors in breach of EU trades description legislations. Whoops.
USB 2.0 was never intended to be branded with a version number. Instead, the USB-IF dubbed it 'Hi-speed USB'. USB 1.1 was to be known as plain old 'USB'. Manufacturers have nevertheless insisted on sticking with the version numbers, which is what seems to have cause all the trouble.
Apparently consumers were shunning older models.
"I now understand the new full-speed and high-speed naming, but what is going to happen when USB 3.0 is released? Is it going to be 'Really High Speed'?," asks an editorial in GeekNews
It's not the first bit of semantic ethnic cleansing we've seen this year. A handful of vendors have hijacked the 4G bandwagon, hoping that this will put them in the driving seat when the real 4G specification is passed.
Here is the link:
http://www.theregister.co.uk/content/54/31349.html[^]
John
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You can use ::GetTopWindow(NULL) to get the HWND of the top window in the Z-order.
Niall
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hi all
does ne1 know if you can write to the
HKEY_LOCAL_MACHINE
i can do it for HKEY_CURRENT_USER, but i cant seem to find
anything on writing to the local_machine
does ne1 know where i can locate some docs on it ?
im using visul studio .net
thanks
si
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It is no different from HKEY_CURRENT_USER just open the root inside of HKEY_LOCAL_MACHINE.
John
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If you can write to CurrentUser, you can also write to LocalMachine. Just use HKEY_LOCAL_MACHINE instead of HKEY_CURRENT_USER...
Accessing LocalMachine is exactly the same as CurrentUser.....
-Dominik
_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??
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Assuming you have the according security rights to write to the registry,
maybe check the return values of the Reg...-functions.
jens
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hello ppl
i have a TV tuner connected to my PC now what i want to do is that i want to inteface with the TV tuner card and find out how many channels are currently running basically what i have to do is grab an image from each channel and extract the logo out of each and every channel that the card is running so the part is about image processing but how do i start i mean i have to first interface with TV TUNER CARD. is there any SDK available or do i have to get a MANUFACTER independent SDK also the TV signals are transmitted via a coaxial cable that means i am not talking about interfacing with a device like a DV cam that is connected to the CARD but rather i am interested in the channels please help me out any help clue or anything would be appreciated
bye
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DirectShow will do it nicely.
Ryan "Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"
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http://www.msu.edu/~morri221/box.JPG[^]
Ok, thats my propertysheet dialog. I can get titles on the individual pages, but does anyone know how to get a title for the big blue space? Since there's not one major dialog, i can't figure out where to put it.
~keegster
*.*
cin >> knowledge;
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Hi,
Assuming that you use CPropertySheet as a storage for your CPropertyPages, I think that a 'CPropertySheet'.SetTitle("My fancy Caption") will do.
Regards
G. Steudtel
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Yep. that too
Ryan "Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"
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You set that in the constructor of your property sheet class - as one of the parameters to the constructor of the CPropertySheet class (the first one, i think from memory).
Hope this helps,
Ryan "Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"
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Edit: fixed! thanks guys.
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I am using ADO to connect to MS_SQL database.
I need to retrieve the columns for a specific stored procedure in this database.
I tried the OpenSchema method with adSchemaProcedureColumns as QueryTpe but an error "Object or provider is not capable of performing requested operation" occurs.
These are the lines of codes that generates the error:
// Establish connection
ADODB::_ConnectionPtr MyConnection = NULL;
MyConnection .CreateInstance(__uuidof(ADODB::Connection));
MyConnection ->ConnectionString = _bstr_t (ConnectionString);
MyConnection ->Open(_bstr_t (L""),_bstr_t (L""), _bstr_t (L""), -1);
ADODB::_RecordsetPtr MySchema = NULL;
MySchema = MyConnection->OpenSchema(ADODB::adSchemaProcedureColumns);
How can i get rid of this error and retrieve the stored procedure.
Is there a solution to get rid of this error? or may be another method that can be used.
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