C / C++ / MFC

Re: I have a question about retrieve a window handle at mouse position.

2-Sep-07 5:00

POINT point={100,200};
HWND hWnd=::WindowFromPoint(point);
if (hWnd) {

// Do something
} else {

// Nothing here
}

tmay_992-Sep-07 11:21

tmay_99

2-Sep-07 11:21

Thank you very much. Well I have another question, does the handle I get with this code belong to a top-level window or a child window. If it is a child window, how could I get the top-level window? Thank you.

Tmay_99

Re: I have a question about retrieve a window handle at mouse position.

bob169722-Sep-07 13:37

Re: I have a question about retrieve a window handle at mouse position.

2-Sep-07 13:37

POINT point={100,200};
HWND hWnd=::WindowFromPoint(point);
HWND hWndParent=NULL;

if (hWnd) {
// Find the highest level parent
do {
hWnd=::GetParent(hWnd);
if (hWnd) {
hWndParent=hWnd;
}
} while (hWnd);
}

if (hWndParent) {

// do something with highest parent
}

bob169722-Sep-07 13:41

Re: I have a question about retrieve a window handle at mouse position.

2-Sep-07 13:41

Well, I'm not sure if you wanted the parent or just the top-most z-order child window.

Let me know if I misunderstood your second question.

bob169722-Sep-07 13:48

Re: I have a question about retrieve a window handle at mouse position.

2-Sep-07 13:48

If I'm missing the mark on this one, you can check out the explanations of the relationships and functions to find them if you open up MSDN, click on the search tab, and find "Win32 Window Hierarchy and Styles".

It goes over the relationships and functions.

tmay_992-Sep-07 14:29

tmay_99

2-Sep-07 14:29

Wow,thanks a lot.Yes, I want the top-level window which GetParent returns NULL. I appreciate your help!

Tmay_99

Problems with the OEM/DOS Font "Terminal" in an RTF View

CrocodileBuck1-Sep-07 23:22

CrocodileBuck

1-Sep-07 23:22

,

i built an SDI Project (RTFView) and i want to edit displayed Text in the fonttype "Terminal" (OEM/DOS Font).
I try this with the CFONTDialog. I can now change the text in every fonttype but not in "Terminal".
Do yo know how i can do this ? Is there a tut or a Code snippet or can you explain how i can fix this Problem ?

Here is my code:

[CODE]
void CTereader0004View::OnUpdate(CView* pSender, LPARAM lHint, CObject* pHint)
{
CTereader0004Doc *pDoc = GetDocument ();

CRichEditCtrl& rCtrl = GetRichEditCtrl(); // Pointer auf das RichEditControl erstellen um dessen Funktionen zu nutzen
CHARFORMAT cfm; // Struktur die die Aktionen der Selektion enthält/ CFont myFont;

rCtrl.ReplaceSel(pDoc->cstrAusgabe);
rCtrl.SetSel(0,482);

cfm.cbSize = sizeof(CHARFORMAT); // Funktionen
cfm.dwMask = CFM_BOLD; // des RichEditCONTROLS zur
cfm.dwEffects = CFM_BOLD; // formatierten Darstellung benutzen

rCtrl.SetSelectionCharFormat (cfm); // Aktionen der Selektion ausführen
rCtrl.SetSel (0,0);

rCtrl.SetModify(FALSE);
}

void CTereader0004View::OnFontChoose()
{
CFontDialog fontDlg;
CFont *m_font = new CFont;

if (fontDlg.DoModal())
{
m_font->CreateFont (fontDlg.GetSize() / 7.25
,NULL
,0
,0
,fontDlg.GetWeight ()
,fontDlg.IsItalic ()
,fontDlg.IsUnderline ()
,fontDlg.IsStrikeOut ()
,DEFAULT_CHARSET
,OUT_DEFAULT_PRECIS
,0
,DEFAULT_QUALITY
,DEFAULT_PITCH
,fontDlg.GetFaceName ());
}

CRichEditCtrl& rCtrl = GetRichEditCtrl(); // Pointer auf das RichEditControl erstellen um dessen Funktionen zu nutzen
CHARFORMAT cfm;
rCtrl.SetFont (m_font);

}

[/CODE]

many many thx
CrocBuck

Re: Problems with the OEM/DOS Font "Terminal" in an RTF View

CrocodileBuck1-Sep-07 23:41

CrocodileBuck

1-Sep-07 23:41

O.K.

I solve the prob.
Wink | ;)

CrocBuck

Visual Studio Express on a disc?

devvvy1-Sep-07 20:54

devvvy

1-Sep-07 20:54

Hi anyone knows if I can get Visual Studio Express on a disc? Installer from Microsfot's site works but our network guys have blocked the installer from downloading packages for installation to complete.

Thanks

Christian Graus2-Sep-07 9:02

Christian Graus

2-Sep-07 9:02

Yes, it's possible, I think you can order it from MS for $5 or something. I know it can be done, I've got teh DVD.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

devvvy2-Sep-07 15:10

devvvy

2-Sep-07 15:10

Thanks Chris

Mark Salsbery2-Sep-07 9:56

Mark Salsbery

2-Sep-07 9:56

Also, you can download CD ISO images and burn your own.

See here[^].

I can't seem to find the link for ordering CDs - I know I saw it in the past.

Did they discontinue shipping CDs for Express editions? I don't know Smile | :)

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

devvvy2-Sep-07 16:56

devvvy

2-Sep-07 16:56

That's great Mark, even better!!

Many thanks!!

COM data sharing

George_George1-Sep-07 19:18

George_George

1-Sep-07 19:18

Hello everyone,

I am developing a COM DLL (native unmanaged C++ using Visual Studio 2005). I have the following requirements and I am wondering what technology should I use to achieve my goal?

1. The COM DLL will be used by multiple different applications (processes), and for some COM objects, I want the different processes to share a single copy of data (CoClass object instance), and for some other COM objects, I want the different processes to share a separate copy of data (CoClass object instance).

2. The COM DLL I developed is working passively and providing service to other 3rd party applications when they invoked the DLL. I can not control the applications (can not access or change code). And the only thing I can control is the COM DLL itself. So, the technology I select to use should be transparent to the applications and only need code change in the COM DLL itself.

thanks in advance,
George

need help

gentleguy1-Sep-07 17:21

gentleguy

1-Sep-07 17:21

dear all

how to biuld a array which size is 500x500 in c++. thanks

zhiyuan

Li Zhiyuan

2/9/2007

progDes1-Sep-07 17:23

progDes

1-Sep-07 17:23

int ar[500][500]; //doesn't work???

Hamid_RT1-Sep-07 18:51

Hamid_RT

1-Sep-07 18:51

See

int a[5]={10,20,30,40,50};
int b[]={1,2,3,4,1000};
int[500][500];
char names[100][200][24][50][50];
int array[20];

Re: need help [modified]

Mark Salsbery1-Sep-07 21:56

Mark Salsbery

1-Sep-07 21:56

I think you posted this question before and got replies.

void SomeFunc()
{
   //On the stack (1,000,000 bytes!! Be careful!):
   int My500x500Array[500][500];
...
}


void SomeFunc()
{
   //On the heap (check return value or handle memory exception
   //    to make sure the memory was allocated!):
   int (*My500x500Array)[500] = new int[500][500];
...
   delete[] My500x500Array;
}

Make sure you have enough stack space for the stack-based variable -
it's 1000000 bytes and the default stack size is generally 1MB.

Mark

Last modified: 11hrs 5mins after originally posted --

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Russell^'1-Sep-07 22:50

Russell^'

1-Sep-07 22:50

Mark Salsbery wrote:
Make sure you have enough stack space for the stack-based variable -
it's 1000000 bytes and the default stack size is generally 1MB.

Only to understand better the problem for myself... I use often big arrays
I found often this "stack-based variable" indication but never studied it deeper:
Is this static variable...
int A[10000];
...a stack-based variable ? So it needs to be checked?
And... is this array...
p = new int[10000];
a not stack-based variable ? ... so it doesn't need a check?
thanks

Russell

progDes2-Sep-07 0:36

progDes

2-Sep-07 0:36

native C++ is platform dependent. If the variable is greater then stack size it even will not compile. But you need to check
p = new int[10000];
because you can be out of memory, and you dont need to check
int A[10000];

Russell^'2-Sep-07 0:43

Russell^'

2-Sep-07 0:43

Exactly the opposite of what I had get Laugh | :laugh:

...
now I understand. Big Grin | :-D

Thanks for the explanation Smile | :)

Russell

Russell^'2-Sep-07 0:54

Russell^'

2-Sep-07 0:54

Ehi... I make a little research on internet....and I found the opposite of what you sad:

Static variables (as int i[100];) goes on the stack.
Dynamic variables (as int*p=new int[100] ) is allocated in the heap (of course: p is in the stack and *p is in the heap)

Is the heap and the stack the same thing?

Confused | :confused:

Russell

progDes2-Sep-07 1:09

progDes

2-Sep-07 1:09

no, stack can be overflowed too but, this is very rarely. You should never allocate big data in stack. The stack size on my mashine is 1 mB, and I was not right when sad that code will not compile when variable is greater then stack size. It will but it will throw ecxeption. You should allocate big data in heap because the only limit of memory is 4 Gb, in Windows memory can be projected on hard disk. The chance to end out of memory, allocating in the heap is very small. Allocation in heap is longer because this is a process of looking for free space in memory while allocating in stack is very fast. So the choice is for you.