Re: external program - C / C++ / MFC Discussion Boards

Dynamically Resize the DialogBox when Dragged

kiran janaswamy17-Apr-06 21:25

17-Apr-06 21:25

hi all,

i have to dynamically increase the Dialog and its controls when the Dialog Box is Dragged. Any Solution.

please let me know.

thanks,
uday.

uday kiran

Re: Dynamically Resize the DialogBox when Dragged

Hamid_RT17-Apr-06 21:34

Hamid_RT

17-Apr-06 21:34

Hi kiran janaswamy,
Whats question?

Re: Dynamically Resize the DialogBox when Dragged

Eytukan17-Apr-06 21:55

Eytukan

17-Apr-06 21:55

check here^

<marquee scrollamount="1" scrolldelay="1" direction="up" height="10" step="1">--[V]--

Re: Dynamically Resize the DialogBox when Dragged

David Crow18-Apr-06 2:52

David Crow

18-Apr-06 2:52

See the "Extras" section of this article.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

external program

MrChefman17-Apr-06 21:25

MrChefman

17-Apr-06 21:25

How can I start an external program - probably an .exe file - in a C++ program. And which would be the best way to be sure the external program has finished?

Re: external program

Stephen Hewitt17-Apr-06 21:29

Stephen Hewitt

17-Apr-06 21:29

Create to process using CreateProcess or ShellExecute (there are other options). Use WaitForSingleObject on the process HANDLE to wait till process has exited.

Steve

Re: external program

Hamid_RT17-Apr-06 21:33

Hamid_RT

17-Apr-06 21:33

Hi MrChefman,
maybe it is some helpful to you

if you run an application from your program use

PROCESS_INFORMATION l_ProcessInfo;
STARTUPINFO l_StartupInfo;

ZeroMemory(&l_StartupInfo, sizeof(STARTUPINFO));

l_StartupInfo.cb = sizeof(STARTUPINFO);
l_StartupInfo.dwFlags = STARTF_USESHOWWINDOW;
l_StartupInfo.wShowWindow = SW_SHOWMAXIMIZED;

CreateProcess(NULL,
"Notepad.exe",
NULL,
NULL,
FALSE,
CREATE_NEW_CONSOLE,
NULL,
NULL,
&l_StartupInfo,
&l_ProcessInfo);
}

Re: external program

Stephen Hewitt17-Apr-06 21:54

Stephen Hewitt

17-Apr-06 21:54

To complete this example:

\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
PROCESS_INFORMATION l_ProcessInfo;
STARTUPINFO l_StartupInfo;

ZeroMemory(&l_StartupInfo, sizeof(STARTUPINFO));

l_StartupInfo.cb = sizeof(STARTUPINFO);
l_StartupInfo.dwFlags = STARTF_USESHOWWINDOW;
l_StartupInfo.wShowWindow = SW_SHOWMAXIMIZED;

if ( CreateProcess(NULL,
"Notepad.exe",
NULL,
NULL,
FALSE,
0,
NULL,
NULL,
&l_StartupInfo,
&l_ProcessInfo))
{
CloseHandle(l_ProcessInfo.hThread);
WaitForSingleObject(l_ProcessInfo.hProcess, INFINITE); // Wait for it to finish.
CloseHandle(l_ProcessInfo.hProcess);
}
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\

Forgetting to close the handles is a common source of resource leaks.

Steve

Re: external program

Hamid_RT17-Apr-06 22:01

Hamid_RT

17-Apr-06 22:01

Thanks

Re: external program

MrChefman17-Apr-06 22:31

MrChefman

17-Apr-06 22:31

Thanks a lot. But I still have a problem in Building the .exe file. Linking works but when trying to build the .exe there are errors:

unresolved external symbol _WinMain@16

I hope, my translation from the German version into English is right Wink | ;-)

I included both header-files windows.h and winbase.h into my win32-application-project.

Where is my mistake?

Re: external program

Le Thanh Cong17-Apr-06 23:23

Le Thanh Cong

17-Apr-06 23:23

You must insert library Kernel32.lib to your project

-----------------
conglt

Re: external program

Branislav17-Apr-06 23:40

Branislav

17-Apr-06 23:40

The linker is looking for the entry point for a console application, but the application is being compiled and linked as a windows application (i.e. not a console application).

This error has been observed after changing the project settings from using MBCS to UNICODE characters.

Under the project settings, under the ‘Link’ tab, category ‘output’, set the ‘Entry-point symbol’ to ‘wWinMainCRTStartup’.

Re: external program

David Crow18-Apr-06 2:54

David Crow

18-Apr-06 2:54

See here.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: external program

MrChefman20-Apr-06 5:03

MrChefman

20-Apr-06 5:03

Thanks a lot. It works!
But there's still a little problem:
When I use the external thread, the command line interface appears for a short time. how can I suppress the command line?

Re: external program

David Crow20-Apr-06 5:13

David Crow

20-Apr-06 5:13

MrChefman wrote:
...the command line interface appears for a short time.

You mean the console window? Have you tried using ShellExecute(..., SW_HIDE), or setting STARTUPINFO.wShowWindow to SW_HIDE if using CreateProcess()?

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

client app -- web app communication?

Peter Weyzen17-Apr-06 21:24

Peter Weyzen

17-Apr-06 21:24

It seems I come here with the strangest questions sometimes... but here goes.

Is there a way for my C++ app on my client to be recognized as present by my web app?

---
I install my app
I browse to my remote website
... can the web app detect that my app is installed?
... would prefer this not to be IE dependent....

Thanks for your thoughts!

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br />
Peter Weyzen<br />
Staff Engineer<br />
<A HREF="http://www.soonr.com">SoonR Inc.</A>

Re: client app -- web app communication?

ThatsAlok18-Apr-06 7:42

ThatsAlok

18-Apr-06 7:42

Peter Weyzen wrote:
Is there a way for my C++ app on my client to be recognized as present by my web app?

\
if you cpp application can send query the web app?

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

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

Re: client app -- web app communication?

Peter Weyzen18-Apr-06 8:36

Peter Weyzen

18-Apr-06 8:36

I was kinda looking for a javascript-ish way or something like that....

but maybe communication from the client could be enough information to make the webserver know that "this machine" is where the client is installed?

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br />
Peter Weyzen<br />
Staff Engineer<br />
<A HREF="http://www.soonr.com">SoonR Inc.</A>

Re: client app -- web app communication?

ThatsAlok18-Apr-06 18:23

ThatsAlok

18-Apr-06 18:23

Peter Weyzen wrote:
but maybe communication from the client could be enough information to make the webserver know that "this machine" is where the client is installed?

.
I am afraid, i fail to understand you problem

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

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

Re: client app -- web app communication?

Peter Weyzen18-Apr-06 19:26

Peter Weyzen

18-Apr-06 19:26

I want to be able to browse to my website -- and have the webpage behave differently if my application is installed on this machine. I would like additional links to show up when it's installed here... or have the webpage figure out this is my home machine....

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br />
Peter Weyzen<br />
Staff Engineer<br />
<A HREF="http://www.soonr.com">SoonR Inc.</A>

a problem on threads

keerthikaaa17-Apr-06 21:15

keerthikaaa

17-Apr-06 21:15

hai to all

i have created a thread function
void ThreadRoute1( void* arg )
{
USES_CONVERSION;

HANDLE hDir = CreateFile( "C:\\", // pointer to the file name
FILE_LIST_DIRECTORY, // access (read/write) mode
FILE_SHARE_READ|FILE_SHARE_DELETE, // share mode
NULL, // security descriptor
OPEN_EXISTING, // how to create
FILE_FLAG_BACKUP_SEMANTICS, // file attributes
NULL // file with attributes to copy
);

FILE_NOTIFY_INFORMATION Buffer[1024];
DWORD BytesReturned;
while( ReadDirectoryChangesW(
hDir, // handle to directory
&Buffer, // read results buffer
sizeof(Buffer), // length of buffer
TRUE, // monitoring option
FILE_NOTIFY_CHANGE_SECURITY|
FILE_NOTIFY_CHANGE_CREATION|
FILE_NOTIFY_CHANGE_LAST_ACCESS|
FILE_NOTIFY_CHANGE_LAST_WRITE|
FILE_NOTIFY_CHANGE_SIZE|
FILE_NOTIFY_CHANGE_ATTRIBUTES|
FILE_NOTIFY_CHANGE_DIR_NAME|
FILE_NOTIFY_CHANGE_FILE_NAME, // filter conditions
&BytesReturned, // bytes returned
NULL, // overlapped buffer
NULL// completion routine
))
{
CTime tm = CTime::GetCurrentTime();

CString helper_txt;

switch(Buffer[0].Action)
{
case FILE_ACTION_ADDED: break;
case FILE_ACTION_REMOVED:break;
case FILE_ACTION_MODIFIED: break;
case FILE_ACTION_RENAMED_OLD_NAME: break;
case FILE_ACTION_RENAMED_NEW_NAME: break;
}
int i=0;
do
{
m_Sec.Lock();
int item = pList1->InsertItem(pList1->GetItemCount(), CString(Buffer[i].FileName).Left(Buffer[i].FileNameLength / 2) );

pList1->SetItemText(item, 1, tm.Format("%Y/%m/%d/ - %H:%M:%S"));
i++;
m_Sec.Unlock();
}
while (!Buffer[i].NextEntryOffset);
}
}

i have called the thread by using a button click function.when i click the button the followinf function works

_beginthread( ThreadRoute1, 0,0 );
here i have a problem .the problem i need to pass a directory path which i have written in a edit box .how can i pass that path to the thread function which i created
please help me to solve this problem
Smile | :)

Re: a problem on threads

Parthiban17-Apr-06 21:23

Parthiban

17-Apr-06 21:23

hi u can pass a void pointer parameter to thread by _beginthread() function.
_beginthread() syntex:

_beginthread(threadname, stack_size, void *parameter);

in ur case,

_beginthread(ThreadRoute1, 0, (void *)filepath);

In thread():

void ThreadRoute1( void* arg )
{
char *filepath;
filepath=arg;
.........
........
}

By
Parthiban

Re: a problem on threads

keerthikaaa17-Apr-06 21:29

keerthikaaa

17-Apr-06 21:29

hai parthiban

thanks for ur reply.

but a small problem is there

an error is coming when i do this.

can u rectify it.

error C2440: '=' : cannot convert from 'void *' to 'char *'

Re: a problem on threads

Stephen Hewitt17-Apr-06 21:35

Stephen Hewitt

17-Apr-06 21:35

C++ (unlike C) has to implicit converion from void*. Use explicit conversion:

char *pFilePath = reinterpret_cast<char*>(arg);

Steve

Re: a problem on threads

Stephen Hewitt17-Apr-06 21:25

Stephen Hewitt

17-Apr-06 21:25

struct DataYouWantToPass
{
    CString AString;
    int ANumber;
};
 
// Now to pass the data.
DataYouWantToPass *pData = new DataYouWantToPass;
// Set data here.
_beginthread(ThreadRoute1, 0, reinterpret_cast<void*>(pData));
 
// As the thread function.
void ThreadRoute1( void* arg ) 
{
    DataYouWantToPass *pData = reinterpret_cast<DataYouWantToPass*>(arg);
// Blah, blah, blah...

Don't forget to see that the data is deleted when it's no longer needed.

Steve

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.