Re: Conversions - C / C++ / MFC Discussion Boards

Member 216100418-Aug-05 15:46

18-Aug-05 15:46

I face a problem when I click the maximize button of the dialog that I have designed. The dialog will maximize when I click the button but for all the edit box and buttons inside the dialog did not automatically maximize. How can I solve this problem?

Re: maximize and minimize button

try8818-Aug-05 16:15

try88

18-Aug-05 16:15

of course it is!
wo should override the function OnSize() to catch the message and in the function you modify the buttons' size dynamically by yourself

路漫漫其修远兮，吾将上下而求索。

Re: maximize and minimize button

Weiye Chen18-Aug-05 16:20

Weiye Chen

18-Aug-05 16:20

I'm afraid you need to handle the positioning or sizing of the controls yourself for WM_SIZING. Fortunately, there are some articles on this issue. Here's some:

http://www.codeproject.com/dialog/dlgresizearticle.asp[^]
http://www.codeproject.com/dialog/easysize.asp[^]

<font=arial>Weiye Chen
Life is hard, yet we are made of flesh...

Conversions

Prgrmr4Christ18-Aug-05 13:58

Prgrmr4Christ

18-Aug-05 13:58

Hi. I need to convert char* to UCHAR[]. Specifically: from a Loadstring to a UCHAR []. Any suggestions?

Re: Conversions

TheGreatAndPowerfulOz18-Aug-05 14:19

TheGreatAndPowerfulOz

18-Aug-05 14:19

try casting (UCHAR*)

Re: Conversions

Prgrmr4Christ18-Aug-05 14:41

Prgrmr4Christ

18-Aug-05 14:41

Did that. It said "error C2440: '=' : cannot convert from 'UCHAR *' to 'UCHAR [256]'". I need it to be converted to UCHAR [256].

Re: Conversions

TheGreatAndPowerfulOz18-Aug-05 14:55

TheGreatAndPowerfulOz

18-Aug-05 14:55

can you give me a code snippet so I can see more specifically what you want to do? Thanks

Re: Conversions

Prgrmr4Christ18-Aug-05 15:39

Prgrmr4Christ

18-Aug-05 15:39

Here's what I'm trying to do:

This code cannot be changed. It works for other purposes, such as char arrays, as well as needing this code to work for UCHAR arrays.
//
CCharHandler::CCharHandler(int res,int size,char *Def)
{
if(size<256)
{
memset(BufferLoadString,0,size);
HMODULE hReferenceLib = LoadLibrary("c:\\DLLCreated.dll");
if(hReferenceLib != NULL)
{
LoadString(hReferenceLib,res,BufferLoadString,size);
FreeLibrary(hReferenceLib);
if(BufferLoadString==NULL)
strncpy(BufferLoadString,Def,size);
}
else
strncpy(BufferLoadString,Def,size);
}
}

//

This code is replaceable. Type of variable is not:
//
UCHAR testchar[] = "OK\r";
//

The string inside quotes is what needs to be replaced. If I can do this without changing UCHAR[] to UCHAR[256] would be good. However, length is unknown. The line after replacement should read something close to:
//
CCharHandler szErrorLoadMessage2(ID_CompiledResource_20001,255,"unable to load ccures");
MessageBox(NULL,szErrorLoadMessage2.BufferLoadString,"",MB_OK);
UCHAR *szLibUCHAR[256];
//

BufferLoadString in the class is defined as:
//
char BufferLoadString[256];
//

Class works. Converting char array to uchar array is what I need help with.

Re: Conversions

toxcct18-Aug-05 20:12

toxcct

18-Aug-05 20:12

you could write your own :

UCHAR* <font color=blue>operator</font> UCHAR* (<font color=blue>const char</font>*) {
    <font color=green>//...</font>
}

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

Virtual disk drive

Eureka_jim18-Aug-05 11:50

Eureka_jim

18-Aug-05 11:50

I need to be able to create a virtual, temporary disk partition entirely in memory but have it appear to an application as an ordinary disk partition. The idea is to allow the application to create and mainpulate files that vanish when the app exits.

Jim Scott

Re: Virtual disk drive

Anonymous18-Aug-05 12:14

Anonymous

18-Aug-05 12:14

check into isoloated storage in the .net framework

Re: Virtual disk drive

MailtoGops19-Aug-05 3:51

MailtoGops

19-Aug-05 3:51

Hi,

There is one solution to this problem..

There is a command called/program subst. you can execute this to create a virtual drive and then you can delete this drive.

Here I have given How I will do it using ms-dos.. (On Windows 2000)

run command or CMD from run.

c:\> subst s: d:\mydirectory

Now you can see s: drive in my computer which will have access to d:\mydirectory.. you can also remove this virtual drive..

Try is it possible to execute a dos command using your programming language. If you can, you can do it.

" Action without vision is only passing time,
Vision without action is merely day dreaming,
But vision with action can change the world "

- Words from Nelson Mandela

Thanks & Regards,

Gopalakrishnan

problem in running an application

celllllllll18-Aug-05 11:32

celllllllll

18-Aug-05 11:32

Hi all,

I don't see my exe file in debug or release.....no errors when I build or compile it using release or debug...And now when I run or execute my application using exe file...I don't see it there in release or debug

I don't know why....

Please help
Thanks in advance

Preeti9

Re: problem in running an application

Christian Graus18-Aug-05 15:13

Christian Graus

18-Aug-05 15:13

Do you mean you don't see the file ? You've changed the path you build to.

Christian Graus - Microsoft MVP - C++

Re: problem in running an application

alias001818-Aug-05 22:19

alias0018

18-Aug-05 22:19

You may check the path!

学阿

Re: problem in running an application

celllllllll19-Aug-05 7:19

celllllllll

19-Aug-05 7:19

Yes,
I can't see the file....but you know what, I am trying to execute a dll file, and we can't execute a DLL file....

Thanks

Preeti9

Re: problem in running an application

MailtoGops22-Aug-05 5:42

MailtoGops

22-Aug-05 5:42

Hi Preeti9,

What do you mean? I couldn't understand.. You CANNOT execute a dll file?. I need more info pls..

" Action without vision is only passing time,
Vision without action is merely day dreaming,
But vision with action can change the world "

- Words from Nelson Mandela

Thanks & Regards,

Gopalakrishnan

error LNK2001

valerie9918-Aug-05 11:14

valerie99

18-Aug-05 11:14

Good afternoon, all

Has anyone seem this before?

error LNK2001: unresolved external symbol _WNetConnectionDialog@8

would it be some kind of the link that I am missing on the setting? or missing certain include file?

thanks!

Re: error LNK2001

Graham Bradshaw18-Aug-05 12:08

Graham Bradshaw

18-Aug-05 12:08

I'm guessing that you've added a call to WNetConnectionDialog recently. The actual implementation of different parts of the Windows API are in different .dll files, and if you call one of the less used functions, you may have to instruct the linker to include the corresponding .lib file. In this case, you'll need to make sure you link with mpr.lib.

Thank you!!!

valerie9919-Aug-05 4:11

valerie99

19-Aug-05 4:11

absolutely!

Re: error LNK2001

sunit518-Aug-05 18:56

sunit5

18-Aug-05 18:56

ur r missing Mpr.lib u can refer to msdn also

yeah! so true!

valerie9919-Aug-05 4:12

valerie99

19-Aug-05 4:12

thanks and have a good weekend!

question related to drivers

gamitech18-Aug-05 10:09

gamitech

18-Aug-05 10:09

I have device driver and I want to write in a file from within the driver.
I am using ZwCreateFile()
ZwWriteFile()
ZwClose() functions.
When I call the InitializeObjectAttributesfunction()
i do not know how should the object name look like.
I mean if my file name is: D:\\status.txt or something like this:
\Device\HarddiskVolume1\status.txt
I want to ask now if these are the functions I should use when writting in a file from the kernel:
Here is a piece of code.
Can someone tell me what I do wrong?

<br />
<br />
NTSTATUS WriteStatusInFile(<br />
IN PCWSTR FileName,<br />
IN HANDLE hProcessId<br />
)<br />
{<br />
UNICODE_STRING ObjN;<br />
OBJECT_ATTRIBUTES ObjAttrib;<br />
UNICODE_STRING ObjName;<br />
IN HANDLE hFile;<br />
IN IO_STATUS_BLOCK StatBlock,WStatBlock;<br />
RtlInitUnicodeString(&ObjN,L"\\D:\\status.txt");<br />
InitializeObjectAttributes(&ObjAttrib,&ObjN, OBJ_KERNEL_HANDLE  , NULL, NULL);<br />
<br />
<br />
ZwCreateFile(&hFile,<br />
			 FILE_WRITE_DATA|FILE_APPEND_DATA,<br />
			 &ObjAttrib,<br />
			 &StatBlock,<br />
			 0,<br />
			 FILE_ATTRIBUTE_NORMAL,<br />
			 FILE_SHARE_WRITE,<br />
			 FILE_CREATE |FILE_OPEN,<br />
			 FILE_SEQUENTIAL_ONLY,<br />
			 NULL,<br />
			 0<br />
			 );<br />
ZwWriteFile(<br />
    hFile,<br />
    NULL,<br />
    NULL,<br />
    NULL,<br />
    &WStatBlock,<br />
    L"Process Created or Terminated\n",<br />
    sizeof("Process Created or Terminated\n"),<br />
    NULL,<br />
    NULL<br />
    );<br />
<br />
ZwClose(hFile);<br />
<br />
return WStatBlock.Status;<br />
<br />
}<br />

Thanks in advance.

gabby

__stdcall

Anton Mikhalyov18-Aug-05 8:09

Anton Mikhalyov

18-Aug-05 8:09

I don't understand why compiler(Microsoft Visual C++ 7.1) always makes code that cleans stack from parameters after execution function that declared as __stdcall:

void corrupt {
typedef HANDLE (__stdcall *FOO)(...); // function must be called via std convention
FOO foo = (FOO)GetProcAddress(LoadLibrary("kernel32.dll"), "GetModuleHandleA");
(*foo)(NULL);
}

Disassembly:
push offset foo.??_C@_0BB@HNEJOH> ; /ProcNameOrdinal = "GetModuleHandleA"
push offset foo.??_C@_0N@MDJJJHM> ; |/FileName = "kernel32.dll"
call near dword ptr ds:[<&KERNEL32.LoadLibraryA> ; |\LoadLibraryA
push eax ; |hModule = 0012F34C
mov edi, dword ptr ds:[<&KERNEL32.GetProcAddress> ; |kernel32.GetProcAddress
call near edi ; \GetProcAddress
push 0
call near eax ; GetModuleHandleA call
add esp, 4 ; An unwanted stack clean

After execution this function we'll see an access violation, because the return address will be wrong.
How can I fix that problem?

PS In project options __stdcall is default calling convention

Re: __stdcall

C^hris L^osinger18-Aug-05 8:33

C^hris L^osinger

18-Aug-05 8:33

you can mark individual functions as "cdecl". then, the calling code is responsible from cleaning the stack.

int __cdecl foo(int a);

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