C / C++ / MFC Discussion Boards

Re: How to call 1-byte character functions?

CPallini19-Sep-09 5:13

19-Sep-09 5:13

Your-Project->Properties menu item, then Configuration Properties->General node, finally set Character Set to Use Multi-Byte character set instead of Use Unicode character set.

however, be aware that (MSDN [^]):

Since Windows NT, all Windows versions are built from the ground up using Unicode. That is, all the core functions for creating windows, displaying text, performing string manipulations, and so forth require Unicode strings. If you call any Windows function passing it an ANSI string (a string of 1-byte characters), the function first converts the string to Unicode and then passes the Unicode string to the operating system. If you are expecting ANSI strings back from a function, the system converts the Unicode string to an ANSI string before returning to your application. All these conversions occur invisibly to you. Of course, there is time and memory overhead involved for the system to carry out all these string conversions.

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: How to call 1-byte character functions?

Anthony Appleyard19-Sep-09 6:00

Anthony Appleyard

19-Sep-09 6:00

Thanks. I have sorted it.

Convert CString to std::string

kumar sanghvi19-Sep-09 3:31

kumar sanghvi

19-Sep-09 3:31

Hi,
Please let me know how to convert Convert CString to std::string

Re: Convert CString to std::string

Richard MacCutchan19-Sep-09 4:09

Richard MacCutchan

19-Sep-09 4:09

CString cstr = "This is a CString";
std::string str;
char* cp = cstr;
str = cp;
// it may even be possible to write:
// str = cstr;

Why not try it?

Re: Convert CString to std::string

CPallini19-Sep-09 4:18

CPallini

19-Sep-09 4:18

You may use a MFC conversion macro (plaase read here, for caveats) for instance:

USES_CONVERSION;
CString str = _T("foo");
std::string s(T2A(str));
MessageBoxA(NULL, s.c_str(), "Converted CString", MB_OK);

About Window 7 theme and MFC

hyrahul6419-Sep-09 3:16

hyrahul64

19-Sep-09 3:16

I have MFC application.
I want all the controls created by this application uses Windows 7 theme no matters on which OS it run.
i.e even running this application on Windows XP should use theme of Windows 7
What should I do?

Re: About Window 7 theme and MFC

Stuart Dootson19-Sep-09 22:52

Stuart Dootson

19-Sep-09 22:52

hyrahul64 wrote:
I want all the controls created by this application uses Windows 7 theme no matters on which OS it run.
i.e even running this application on Windows XP should use theme of Windows 7
What should I do?

Try to port the Windows 7 themes and theming engine to XP?

Seriously - think about this - it's not going to work. Windows 2000 didn't have Windows XP themes, so apps looked different in XP and 2000. Windows XP doesn't have Vista/7 theming (I'll count them as the same thing for simplicity), so apps look different in Vista/7 and XP. Deal with it and get over it.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: About Window 7 theme and MFC

caroparo14-Jan-10 22:41

caroparo

14-Jan-10 22:41

But Google Chrome on XP is using the Windows 7 theme. Did they simply hack the button pics out of Win 7 resource? Confused | :confused:

Re: About Window 7 theme and MFC

Stuart Dootson14-Jan-10 23:01

Stuart Dootson

14-Jan-10 23:01

It's a hack, yes. What really gives it away (to me) is that even on WIndows 7, Ultramon can't put it's extra caption buttons on a Chrome window, indicating a completely custom caption bar.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

MVP for 2010 - who'd'a thunk it!

Matrix multiplication in C

Shivam Singh19-Sep-09 3:04

Shivam Singh

19-Sep-09 3:04

source code for matrix mulipication in c using linear arrays and pointers required !!!!

Re: Matrix multiplication in C

CPallini19-Sep-09 3:19

CPallini

19-Sep-09 3:19

Why don't implement yourself? It maybe amusing.
Anyway, you may have a look at "Numerical Recipes in C" [^].
Smile | :)

Re: Matrix multiplication in C

Michael Schubert19-Sep-09 5:32

Michael Schubert

19-Sep-09 5:32

Shivam Singh wrote:
source code for matrix mulipication in c using linear arrays and pointers required !!!!

Would you like fries with that?

Add an event on runtime

clint198219-Sep-09 0:50

clint1982

19-Sep-09 0:50

Hello
I am working with MFC.
I am loading an external DLL using LoadLibrary and call a function within this DLL.
This function opens a dialog box and this dialog box has several controls.
I have the HWND and ids of the dialog box and controls.
I want to register to the getFocus event of one of the controls (On runtime).

I was looking for a long time and couldn't find any helpful function or example, could any one help ?

Re: Add an event on runtime

theCPkid19-Sep-09 1:28

theCPkid

19-Sep-09 1:28

what are you exactly trying to achieve by registering for onfocus()? afaik every control is derived from CWnd and every CWnd receives a WM_SET_FOCUS event when it receives a focus. if your control is child of dialog and you dont want to override the default class of control, then maybe you need to check whether your dialog received the WM_SET_FOCUS when one of its child gets the focus as a dialog can never have focus - only its child can have focus.

And if you can get the setfocus function call, you can easily signal your main application from the dll.. or not??

Re: Add an event on runtime

clint198219-Sep-09 1:34

clint1982

19-Sep-09 1:34

There is the login dll of windows GinaDLL.dll
In this DLL there is a function that opens a dialog box for entering the login username and password.
I want to use the functionallity of this DLL and not override the whole DLL.
I want to know when the user is typing in the username edit box and when he is typing in the password edit box.
Since this is an external dll, I can't use the DECLARE_MESSAGE_MAP, BEGIN_MESSAGE_MAP and END_MESSAGE_MAP macros.

Re: Add an event on runtime

theCPkid19-Sep-09 1:56

theCPkid

19-Sep-09 1:56

check if
http://msdn.microsoft.com/en-us/library/aa374744(VS.85).aspx
or Hooks and DLLs

are of any use to you. Hooking msgina.dll will not be that easy and I dont know if there's any other way of doing this.

Re: Add an event on runtime

CPallini19-Sep-09 1:57

CPallini

19-Sep-09 1:57

You may go through subclassing, see, for instance [^].
Smile | :)

How can find all image files in MyComputer?

Le@rner19-Sep-09 0:23

Le@rner

19-Sep-09 0:23

Hi all,

i want to find all types of image files those are present in my computer .

and display them by thumbnail view.

please help me for this.

thanks in advance.

To accomplish great things, we must not only act, but also dream;
not only plan, but also believe.

Re: How can find all image files in MyComputer?

theCPkid19-Sep-09 1:37

theCPkid

19-Sep-09 1:37

I dont know of any simpler way than using CFileFind::FindFile to enumerate through all files, find if they are image files and then if they are then extracting the bitmap from them using Gdiplus and then storing that bitmap for subsequent display.

umm... D'Oh! | :doh:

what do you think?

Re: How can find all image files in MyComputer?

Michael Schubert19-Sep-09 5:34

Michael Schubert

19-Sep-09 5:34

theCPkid wrote:
what do you think?

Sounds like an excellent suggestion! Big Grin | :-D

Re: How can find all image files in MyComputer?

theCPkid19-Sep-09 6:43

theCPkid

19-Sep-09 6:43

hehehehe.. Roll eyes | :rolleyes:

who knows he may have something better to say about my approach and in criticizing or approving that, he may arrive at better solution. moreover, i am trying to bring spiritual touch to my programming skills and I believe that our inner soul knows all the answers. only they need to be brought to surface. Poke tongue | ;-P

glad you appreciate it. $Shucks | :-\$

Re: How can find all image files in MyComputer?

C^hris L^osinger19-Sep-09 7:13

C^hris L^osinger

19-Sep-09 7:13

i'd just store the filename, then read the bitmap when it was time to display. otherwise... that could be a lot of stored bitmaps.

image processing toolkits | batch image processing

Re: How can find all image files in MyComputer?

raghava.thummapudi19-Sep-09 8:18

raghava.thummapudi

19-Sep-09 8:18

go to search and then select files&folders then type which type u want .(.jpg,.bmp)

How to activating already running application

ranjithgoud19-Sep-09 0:16

ranjithgoud

19-Sep-09 0:16

Hi all,

VC++(MFC) 6.0

I have to open my application only one time,for that I am using folllowing code

HANDLE hMutex;
hMutex = CreateMutex(NULL,TRUE,TEXT("vision client"));
if(hMutex == INVALID_HANDLE_VALUE)
{
    AfxMessageBox("Unable to create Mutex");

}
else
{

    if(GetLastError()==ERROR_ALREADY_EXISTS)
    {
         HANDLE proc_h = GetCurrentProcess();
         AfxMessageBox("Application is already Opened !!!");
         _exit(0);
    }
}

But Instead of closing the application I have to activate the application .
Please help me.

Ranjith

Re: How to activating already running application

Code-o-mat19-Sep-09 0:40

Code-o-mat

19-Sep-09 0:40

You could try registering a custom window message on the system using RegisterWindowMessage[^], when you want to activate your app, broadcast this message using BroadcastSystemMessage[^], in your application make a handler for this message and use SetForegroundWindow[^] or some such to activate your application.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> Sometimes you just have to hate coding to do it well. <

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