C / C++ / MFC

20-Mar-07 0:23

I am trying to postmessage from one call back to other now from one call back I am trying to send the path and index of the selected file,at the second end when it receive but the type casting problem.well I dont know whether can we pass the text string to wParam?

<code>
WCHAR path[MAX_PATH];
iSlected=SendMessage(hList,LVM_GETNEXTITEM,-1,LVNI_SELECTED);
if(iSlected==-1)
{
break;
}else
{
ListView_GetItemText(hList,iSlected,2,(LPWSTR)&path,MAX_PATH);
          .
          .
          .
          .
::PostMessage(hWndinoutfiledir,WM_INITDIALOG,(WPARAM)path,(LPARAM)iSlected);// is it ok ?
}</code>
can I send my path from 3rd parameter of postmessage?
//receiving end
<code>
w_Path=(WCHAR [])wParam; //type casting problem ??????????
selectedIndex =(int)lParam;
if(selectedIndex!=-1)
{
hwndTxtDestPath = GetDlgItem(hWndOutputDirectory,IDC_STATIC_PATH);
SendMessage(hwndTxtDestPath,WM_SETTEXT,0,(LPARAM)w_Path);
}
</code>

"Success lies not in the result , But in the efforts !!!!!"
Amit Mistry - petlad -Gujarat-India

toxcct20-Mar-07 0:26

20-Mar-07 0:26

just wondering; do you have anything to deal with this[^] ?

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Parthi_Appu20-Mar-07 0:34

Parthi_Appu

20-Mar-07 0:34

<blockquote class="FQ"><div class="FQA">amitmistry_petlad wrote:</div>w_Path=(WCHAR [])wParam; //type casting problem ??????????</blockquote>

Do like this,
w_Path = reinterpret_cast<WCHAR*>(lParam);

Watch: in sender side WCHAR Path[..] is local to the method and you are using PostMessage. Use SendMessage or allocate memory for Path in heap.

Do your Duty and Don't expect the Result

prasad_som20-Mar-07 1:21

20-Mar-07 1:21

amitmistry_petlad wrote:
::PostMessage(hWndinoutfiledir,WM_INITDIALOG,(WPARAM)path,(LPARAM)iSlected);// is it ok ?

No, its not ok.
Have you seen description for WM_INITDIALOG in MSDN, See how WPARAM and LPARAM should be used in that case.

amitmistry_petlad wrote:
w_Path=(WCHAR [])wParam; //type casting problem ??????????

Have you refered Parthi_Appu's suggestion ?

Prasad
Notifier using ATL | Operator new[],delete[][^]

amitmistry_petlad 20-Mar-07 1:24

20-Mar-07 1:24

yes i am in process of that.

"Success lies not in the result , But in the efforts !!!!!"
Amit Mistry - petlad -Gujarat-India

amitmistry_petlad 20-Mar-07 1:46

20-Mar-07 1:46

can I send two postmessage for two different window?

"Success lies not in the result , But in the efforts !!!!!"
Amit Mistry - petlad -Gujarat-India

prasad_som20-Mar-07 1:48

20-Mar-07 1:48

amitmistry_petlad wrote:
can I send two postmessage for two different window?

Yes.

Was you really wanted to ask this ?

Prasad
Notifier using ATL | Operator new[],delete[][^]

amitmistry_petlad 20-Mar-07 1:58

20-Mar-07 1:58

prasad_som wrote:
Was you really wanted to ask this ?

Ya ! if you remember master before few days ago I had asked you about how to postmessage.Now I used two post message below.

::PostMessage(hWndinoutfiledir,WM_INITDIALOG,0,(LPARAM)path);//new one , not working
::PostMessage(hwndTagEditorDlg, WM_COMMAND, MAKELONG( IDC_HIDDEN_BTN, BN_CLICKED ),index);//old one working

Thats why I asked you.

"Success lies not in the result , But in the efforts !!!!!"
Amit Mistry - petlad -Gujarat-India

prasad_som20-Mar-07 2:06

get data of java application in a HTML page

20-Mar-07 2:06

amitmistry_petlad wrote:
if you remember master

Please ! dont call so.

amitmistry_petlad wrote:
::PostMessage(hWndinoutfiledir,WM_INITDIALOG,0,(LPARAM)path);//new one , not working

I wonder , why you needed to send WM_INITDIALOG, it will be automatically called whenever dialog box is about to display. And again, you have not read the documentation, and send wrong parameters.

Prasad
Notifier using ATL | Operator new[],delete[][^]

martin_j19-Mar-07 23:41

martin_j

19-Mar-07 23:41

Hi!

I'm a beginner at Visual C++, so I apologize if I do not express myself correctly...
I'm writing an HTMLView application for logging changes in the stock market. I navigate to a web page showing real time stock values using HTMLView. The stock values are shown in a java application in the web page. Is there a way to take control over this java application and gather the data displayed in the window?

Thanks

Martin_j

Re: get data of java application in a HTML page

ThatsAlok20-Mar-07 1:48

ThatsAlok

20-Mar-07 1:48

martin_j wrote:
Is there a way to take control over this java application and gather the data displayed in the window?

AFAIK .. it very typical task. as Java Embed the control in it self.. !

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LPCWSTR Problem

Programm3r19-Mar-07 23:32

Programm3r

19-Mar-07 23:32

Hi all,

I'm trying to create a file, but every time the filename is all sorts of funny characters. Can anyone please help ?

hFile = CreateFile((LPCWSTR)"Error_Occured.err",
                GENERIC_WRITE,
                0,
                NULL,
                CREATE_ALWAYS,
                FILE_ATTRIBUTE_NORMAL,
                NULL);

Many thanx
Regards,

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Parthi_Appu19-Mar-07 23:38

Parthi_Appu

19-Mar-07 23:38

try thid,

hFile = CreateFile(_T("filename"), ....);

Do your Duty and Don't expect the Result

Programm3r20-Mar-07 0:00

Programm3r

20-Mar-07 0:00

Thank you for the response, I'll try it.

Regards,

The only programmers that are better than C programmers are those who code in 1's and 0's..... Smile | :)

Programm3r
Bronze
My Blog: ^_^

toxcct20-Mar-07 0:23

20-Mar-07 0:23

No !! the solution you got is partly right, but partly wrong !!!

it will work only if you explicitely #define UNICODE.

what you can do if you want a litteral string to always be "wide" is to define it like this :

<code>L</code>"Error_Occured.err"

see the L prepending the string.

however, i suspect you to needing _T() macro anyway, because CreateFile may have 2 distinct implementation (i didn't verify the doc, so i'm not sure at all), one for ansi, and one for unicode.

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prasad_som20-Mar-07 0:29

20-Mar-07 0:29

Programm3r wrote:
hFile = CreateFile((LPCWSTR)"Error_Occured.err",

Type casting in this manner is usually bad idea. Use _T() macro instead.
Simply see this test,

LPCWSTR pTestCast = (LPCWSTR)("Error_Occured.err");//you will get garbase value <code>pTestCast</code> is indicating to

Now covnert it to,

LPCWSTR pTestCast = (LPCWSTR)(_T("Error_Occured.err"));

Prasad
Notifier using ATL | Operator new[],delete[][^]

toxcct20-Mar-07 0:33

20-Mar-07 0:33

why not using C++ cast operators ?! Poke tongue | ;-P

prasad_som wrote:
LPCWSTR pTestCast = (LPCWSTR)("Error_Occured.err");//you will get garbase value pTestCast is indicating to

LPCWSTR pTestCast = (LPCWSTR)(_T("Error_Occured.err"));

Notice that those 2 lines of code are quite the same, because is unicode is not defined, _T() simply equals its content (just removed)...

for such conversions, the macro CT2W() is more appropriate.

Here[^] is a link to those macros

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Parthi_Appu20-Mar-07 0:40

Parthi_Appu

20-Mar-07 0:40

Hi,
Actually _T() will do..
No need for typecasting to LPCWSTR or CT2W().
Simply, _T("sometext") means, sometext will be treated as ANSI and if _UNICODE is defined, then, sometext will be converted to its UNICODE equvalent.

Do your Duty and Don't expect the Result

toxcct20-Mar-07 0:48

20-Mar-07 0:48

Parthi_Appu wrote:
_T("sometext") means, sometext will be treated as ANSI and if _UNICODE is defined

hey, here is how the macro is defined :

#if defined(UNICODE)
    #define _T(x) L##x
#else
    #define _T(x) x
#endif

so if you don't define unicode, the string will remain ansi (so, not neither LPWSTR nor LPTSTR but LPSTR !!!)

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