C / C++ / MFC

Patrik Mueller21-Jan-05 1:24

Patrik Mueller

21-Jan-05 1:24

Thats clear - but try that within an unicode environment!

my last idea was that:

std::string result;
int i;
char *pmb = (char *)malloc( sizeof( char ) );

for (int j = 0; j < theString.GetLength()+1; j++)
{

i = wctomb( pmb, theString.GetAt(j) );
if (i != 1 && i != -1)
result.append(pmb);
}

But no success ;-(

Mircea Puiu21-Jan-05 1:38

Mircea Puiu

21-Jan-05 1:38

Try to use ANSI-To-UNICODE and UNICODE-TO-ANSI string conversions:

   <br />
char *ansistr = "Your text";<br />
int a = lstrlenA(ansistr) + 1;<br />
BSTR unicodestr = SysAllocStringLen(NULL, 2*a);<br />
MultiByteToWideChar(CP_ACP, 0, ansistr, a, unicodestr, a);<br />
// Do something with your string, for example<br />
AfxMessageBox(CString(unicodestr), MB_OK, 0); :-)<br />
// Free the BSTR<br />
SysFreeString(unicodestr);<br />

and

<br />
BSTR unicodestr;<br />
// Get you string somehow<br />
SomeFunction(unicodestr);<br />
int a = SysStringLen(unicodestr) + 1;<br />
char *ansistr = new char[a];<br />
WideCharToMultiByte(CP_ACP, 0, unicodestr, -1, ansistr, a, NULL, NULL);<br />
// Do something with your string, for example<br />
AfxMessageBox(ansistr, MB_OK, 0); <br />
// Free the memory after using the strin<br />
delete[] ansistr;<br />
SysFreeString(unicodestr);<br />

SkyWalker

Maximilien21-Jan-05 2:50

Maximilien

21-Jan-05 2:50

The unicode version of std::string is std::wstring; conversion should be straightforward.

or if you really need to use std::string, I think someone answered that already.

Maximilien Lincourt
Your Head A Splode - Strong Bad

Emilio Garavaglia21-Jan-05 3:33

Emilio Garavaglia

21-Jan-05 3:33

CString is based on TCHAR that is #define-ed as char or wchar_t depending if ANSI or unicode.

std::string is ANSI, std::wstring is unicode.
They are typedef-s for std::basic_string<char> and std::basic_string<wchar_t> respectively.

It can be probably intresting -to reproduce TCHAR adaption- to use something like

namespace std {
   typedef basic_string<TCHAR> tstring;
}

and then, use

std::tstring<code><br />
 <br />
<br />
<small><br />
2 bugs found.<br />
> recompile ...<br />
65534 bugs found.<br />
:doh:<br />
</small>

Re: Creating a HDROP object

Patrik Mueller21-Jan-05 20:07

Patrik Mueller

21-Jan-05 20:07

Hi all,

Now I've got a working solution...

Thanks for all your help!!!!!

Patrik

Creating a HDROP object

peluquero8020-Jan-05 23:55

peluquero80

20-Jan-05 23:55

Anyone knows how to create, having an array of files, a HDROP object in C?
All the documentation points to COM paradigm but no documentation available under MSDN for implementing this in C.

Thank you all
Marco

Blake Miller21-Jan-05 8:45

Re: Creating a HDROP object

21-Jan-05 8:45

First call DragAcceptFiles to activate D&D messages to your window.

Then respond to WM_DROPFILES - wParam has the HDROP

Call DragQueryFile and/or DragQueryPoint to obtain file names.

Then call DragFinish when you are done with the memory that the HDROP references.

peluquero8023-Jan-05 23:23

peluquero80

23-Jan-05 23:23

Ok, thank you. Now my application accepts dragged files, but can't still create my own objects to drop to the shell and/or to other applications.
The only remaining question is now <<ho to="" creating="" a="" sinthetic="" hdrop="" object="" by="" choosing="" your="" own="" files="" append="" into="" clipboard?="">>
I mean, if my app had to create its own file, by "FileWriting" a stream, at the end of the ops, how it would set a synthesized object into Global Memory such to be accessed by other apps?
Is it just the same as copying a DIB or a WAVE, allocating global memory, locking and writing first some structure signature like BITMAPINFO and then the whole buffer containing zero terminated strings?

Thank you,

Marco

Re: Creating a HDROP object

Blake Miller25-Jan-05 4:47

Hot to get the handle of the main window?

25-Jan-05 4:47

The ClipBoard is different from HDROP.

Data in the clipboard is in one (or more) of several standard formats or else in a proprietary format of your own choosing. I do believe you need to allocate memory specially for object data placed into the clipboard.

For Drag and Drop support of your own objects, you need to use COM - read about the IDropSource and IDropTarget interfaces.

The IDropSource interface is one of the interfaces you implement to provide drag-and-drop operations in your application. It contains methods used in any application used as a data source in a drag-and-drop operation. The IDropTarget interface is one of the interfaces you implement to provide drag-and-drop operations in your application. It contains methods used in any application that can be a target for data during a drag-and-drop operation.

Vaibhav Sanghavi20-Jan-05 23:54

Vaibhav Sanghavi

20-Jan-05 23:54

Hi All,

I am launching an exe using CreatProcess. I have handle and ID of launched process and its main thread. I want the handle to its main window. How do I?

One way is through EnumThreadWindows(), which will get me all window handles for the main thread. But how do I know which one is the main window handle?

Any other aproach?

--------------
Vaibhav...

vikramlinux21-Jan-05 0:56

vikramlinux

21-Jan-05 0:56

Hie,
The term "Main Window" is a bit confusing.I think u should think in terms of main parent window or the window whose parent is either NULL or desktop.I think there is no way to detect it thr enumwindows. Better u should check for caption of window or might be windwos style...or desktop as parent or NULL parent...

vvs

Abhi Lahare21-Jan-05 0:59

Abhi Lahare

21-Jan-05 0:59

Use EnumWindows first to iterate through all top level windows and then use GetWindowThreadProcessId() to find the windows that belongs to process.

Regards
Abhi Lahare

Blake Miller21-Jan-05 8:49

21-Jan-05 8:49

Generally, the top level window of the app is the one without any parent, or its parent is the desktop.

Or has has been mentioned, call EnumDesktopWindows and use GetWindowThreadProcessId until you find one (or more) windows matching the process and thread id you already have.

Fonts are scaled while scaling metafile

Vaibhav Sanghavi23-Jan-05 19:50

Vaibhav Sanghavi

23-Jan-05 19:50

Thanks Miller! I could not reply as it was weekend for me.

The solution given by you works fine and gives me the hadle.

One more thing. EnumThreadWindows() enumberates the all windows associated with a thread and returns their handles. I have noticed that the very first handle it returns is the handle of the main window. Which is exactly the same you get by your solution. So this is another approach.

I have one more query..

I am currently creating an application which requires to launch an application in backgroud and the user should not be able to see the application window. I am using CreateProcess API to launch the application in background and using the STARTUP_INFO structures's flag (STARTF_USESHOWWINDOW)to hide the newly launched application's window. But by doing this though the application is launched in background and is not visible to the end user the splash screen of the application is visible to the end user. I have tried manipulating few flags of STARTUP_INFO structure but it didnt helped.

I am looking for any alternative way by which i can accomplish the afore said task or any usefull information?

My coulleague has posted this question at following URL.

http://www.codeproject.com/script/comments/forums.asp?forumid=1647&select=1022368&tid=1022368#xx1022368xx

Please respond there.
Thanks for your reply.

--------------
Vaibhav...

marukas20-Jan-05 23:42

marukas

20-Jan-05 23:42

Hello,

Is it possible to prevent font scale whiel scaling metafile? I get metafile of size (x, y) and I'm rescaling it to size (2x, 2y). How can I rescale objects in metafile and leave the same size of fonts?

Thanx in advance

marukas

Need help!!! How to create a connection in Network connections in WinXP?

Chuaaico20-Jan-05 23:42

Chuaaico

20-Jan-05 23:42

I have two questions:

1. Anyone know how to use VC++ to create and place a connection in Network Connections in Windows XP? For example, a dial up connection.

2. I want to create a connection using EAP 802.1x to authenticate to another computer. What should I do?

Thank you very much for your attention.

Help wanted with CRecordset

xcavin20-Jan-05 21:15

xcavin

20-Jan-05 21:15

My CRecordSet derived class is corrupting the heap when MoveNext() function is called. But only for certain tables. ie, _heapchk() function asserts if called after CRecordset::Move(Rows,Type). Did anyone else faced any similar problem ?

2. How can I view all the records in a CRecordSet object while debugging. Any tips ?

p.s. I found some more information on this bug. The error happens only if any column is of type varchar and has lenght 255. If i reduce that length to 25, the error disappeared.
btw my application is unicode build.

Thanks in advance.

Re: Help wanted with CRecordset

David Crow21-Jan-05 10:15

David Crow

21-Jan-05 10:15

When MoveNext() is called, the columns of the current row are transferred to variables (via RFX) in the record set. Are the variables of sufficient size? This is just a guess.

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

GetKeyState

vidhyas20-Jan-05 17:06

vidhyas

20-Jan-05 17:06

Yes , i can understand friend...but this case works out in a single machine..But in Client and Server concept it fails..I use the same GetKeyState() fn to retrieve the keystate...I check for its return value...

getKey = ::GetKeyState(vk);

if(getKey & 0xF000)
printf("%c pressed 0xF000\n",tempbuffer[c]);

else if(getKey & 0x000F)
printf("%c releases 0x000F\n",tempbuffer[c]);

else if(getKey & 0x0001 == 0x0001)
printf("%c Key is toggled\n",tempbuffer[c]);

else if( getKey & 0x8000 == 0x8000)
printf("%c Key is pressed\n",tempbuffer[c]);

else
printf("%c key is neither pressed nor toggled",tempbufferc]);
}

For the above cases

for some of the characters condn. fails and so the message
"Key is neither pressed nor toggled " message gets printed.

What can i do for this ?

Thank u

Re: GetKeyState

Blake Miller21-Jan-05 8:53