Re: how to avoid context menu for activex control - C / C++ / MFC Discussion Boards

Re: file creation issue on windows7

David Crow17-Aug-10 7:14

David Crow

17-Aug-10 7:14

MKC002 wrote:
any solution for that

Check GetLastError().

Also, turn UAC off and see what that does.

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Re: file creation issue on windows7

«_Superman_»17-Aug-10 19:08

«_Superman_»

17-Aug-10 19:08

If you're creating the file in any of the locations not recommended like C:\, C:\Windows etc. your program will need to run with elevated privileges. Try executing the program elevated by right clicking and selecting Run as administrator.

«_Superman_»

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Polymorphism in C

Re: file creation issue on windows7

MKC00217-Aug-10 22:54

MKC002

17-Aug-10 22:54

i run my program as administrator (right click on exe and select run as administrator).but still it fails to creat file
how to programatically run my program as administrator?
i think there is UAC problem but i dont know how to solve it

Visual Studio 2010 dog slow

Leif Goodwin17-Aug-10 4:23

Leif Goodwin

17-Aug-10 4:23

We are upgrading to VS2010 (C++) and on XP machines it is dog slow. Sometimes the IDE will hang the PC for 30 seconds or more. Right click a mouse button, and 30 seconds later the popup menu appears. And this is not while compiling. VS 2010 seems fine on Windows 7. Does anyone have any ideas what the problem is? I assume it is something like intellisense getting its knickers in a twist, or some other background task. Oddly enough the Task Manager shows near zero CPU usage during these hangs. We do have plenty of RAM so virtual memory paging is not thrashing.

Re: Visual Studio 2010 dog slow

David Crow17-Aug-10 5:51

David Crow

17-Aug-10 5:51

You might also want to ask here.

Re: Visual Studio 2010 dog slow

Leif Goodwin17-Aug-10 5:52

Leif Goodwin

17-Aug-10 5:52

Ooops. Thanks.

how to avoid context menu for activex control

MKC00217-Aug-10 2:09

MKC002

17-Aug-10 2:09

Create mfc dialog base application and put an activex control on dialog (calender control or web browser control). Initialize activex control with some data
execute the application. activex control on Dialog box displays the data.
right click on activex control-> context menu appears
how to avoid this context menu and any other mouse/keyboard operations on activex control

Re: how to avoid context menu for activex control

Cool_Dev17-Aug-10 2:47

Cool_Dev

17-Aug-10 2:47

check whether activex control exposes any functions to suppress menus.

If not, override PreTranslateMessage() function for your parent window, and simply do return for the messages that generates menus on ativex control

for eg, for Mouse right button click/double click:

BOOL CMyDlg::PreTranslateMessage(MSG* pMsg) 
{
	if(pMsg->message == WM_RBUTTONDOWN || pMsg->message == WM_RBUTTONDBLCLK)
		return TRUE;
	
	return CDialog::PreTranslateMessage(pMsg);
}

you may do further filtering by checking pMsg->pt or pMsg->hwnd members also.

Re: how to avoid context menu for activex control

MKC00227-Aug-10 1:07

MKC002

27-Aug-10 1:07

it's not working for windows media player activex control

Re: how to avoid context menu for activex control

Cool_Dev27-Aug-10 2:57

Cool_Dev

27-Aug-10 2:57

"check whether activex control exposes any functions to suppress menus"

on windows media player activex, set enableContextMenu property to False.
or call put_enableContextMenu(FALSE)

allocate and lock memory

AmbiguousName17-Aug-10 0:30

AmbiguousName

17-Aug-10 0:30

hello guys...lets suppose we have 3 buffers, how can we allocate and lock memory for these three buffers?? Confused | :confused:

thanx for ur thoughts

Re: allocate and lock memory

Moak17-Aug-10 0:36

Moak

17-Aug-10 0:36

overloaded Name wrote:
lets suppose we have 3 buffers, how can we allocate and lock memory for these three buffers

On a low level you don't lock memory, you allocate it.... and deallocate when not needed anymore.
In a object oriented programming language (like C++) you use data containers instead of manual memory handling, have a look std::vector:

http://www.parashift.com/c++-faq-lite/containers.html[^]
http://www.codeguru.com/cpp/cpp/cpp_mfc/stl/article.php/c4027[^]

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Re: allocate and lock memory

Maximilien17-Aug-10 0:54

Maximilien

17-Aug-10 0:54

have a look at the VirtualAlloc, VirtualLock API ...

M.

Watched code never compiles.

Re: allocate and lock memory

Aescleal17-Aug-10 1:19

Aescleal

17-Aug-10 1:19

You ought to explain what you mean by "lock." Depending on who you are it might mean "allow only one thread to access the memory", "disable paging for the memory", "don't allow memory to move in the virtual address space" or one of several others.

Cheers,

Ash

Re: allocate and lock memory

«_Superman_»17-Aug-10 19:23

«_Superman_»

17-Aug-10 19:23

You can use the GlobalAlloc and GlobalLock APIs.
Or you can use HeapAlloc which is what is internally called by the new operator.

«_Superman_»

I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Polymorphism in C

FillRect C++

arthur89kim17-Aug-10 0:18

arthur89kim

17-Aug-10 0:18

Hi all, I am using Visual Studio 2005 with MFC application. I have create a transparent window with following codes:

HINSTANCE hInst = ::GetModuleHandle(NULL);

WNDCLASSEX wc;
wc.cbSize=sizeof(WNDCLASSEX);
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hbrBackground = (HBRUSH)GetStockObject( NULL_BRUSH );
wc.hCursor = LoadCursor( NULL, IDC_CROSS );
wc.hIcon = LoadIcon( NULL, IDI_APPLICATION );
wc.hInstance = hInst;
wc.lpfnWndProc = (WNDPROC) CCaptureDlg::WndProc;
wc.lpszClassName = L"Test";
wc.lpszMenuName = 0;
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.hIconSm = NULL;

        m_hWnd=::CreateWindowEx(WS_EX_TRANSPARENT|WS_EX_TOPMOST,L"Test",0, WS_VISIBLE|WS_POPUP,0,0, m_ComputerResolutionX, m_ComputerResolutionY,0,0,0,this);

In that Window "Test", I can drag and draw a rectangle but when I keep dragging and moving the mouse around the screen, it does not clear off my previous drawing, is there a way to clear off my previous drawing? I have tried FillRect as following but still does not work:

case WM_MOUSEMOVE:
     {
 if (pClass->m_MouseDown==1)  //to indicate mouse is pressed before drawing
 {
             HDC hdc;
 hdc = ::GetWindowDC(hwnd);
             RECT re;
 SetRect(&re, 0,0,pClass->m_ComputerResolutionX,pClass->m_ComputerResolutionY);

 HBRUSH brush =(HBRUSH)::GetStockObject(NULL_BRUSH);
 if (pClass->m_tempPoint.x!=p.x && pClass->m_tempPoint.y!=p.y)    //if mouse move into different position
 {
     static int count = 0;
     TRACE(L"Test %d\n", count++);
     FillRect(hdc,&re,brush);
     pClass->m_tempPoint=p;
 }

 CPen mypen(PS_DOT, 1, RGB(0,0,0));
 HPEN pen = (HPEN)mypen;

 SelectObject(hdc, pen);
 SelectObject(hdc, brush);
             ::Rectangle( hdc, pClass->m_InitPoint.x, pClass->m_InitPoint.y, p.x , p.y);
             }
 break;
     }

Or is there another way to remove my previous drawing on this transparent window other than FillRect? I would be pleased to learn about it. TQ~

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Re: FillRect C++

Richard MacCutchan17-Aug-10 0:44

Richard MacCutchan

17-Aug-10 0:44

You should not be drawing to your window in the message handler for the mousemove. The mouse move code should set the limits and other details of your shape, but the actual drawing should be done in your OnDraw() or OnPaint() handler. There are lots of samples on MSDN[^].

It's time for a new signature.

Re: FillRect C++

malcombold10-Sep-10 23:14

malcombold

10-Sep-10 23:14

what if i use bitblt to draw the rectangle?

However, there is a problem i faced, after i've bitblt, the background turns to be black color. I just don't why?

"BitBlt(Hdc, 0, 0, pClass->m_ComputerResolutionX, pClass->m_ComputerResolutionY, pClass->m_MemDC, 0, 0, SRCCOPY);"

The bitblt was done in WM_PAINT.

Anyone has any ideas?

Re: FillRect C++

Richard MacCutchan11-Sep-10 1:33

Richard MacCutchan

11-Sep-10 1:33

I'm not sure why this question was posted to me.

It's time for a new signature.

Re: FillRect C++

Eugen Podsypalnikov17-Aug-10 3:15

Eugen Podsypalnikov

17-Aug-10 3:15

Additional to the words of Richard
this "dotted rectangle"[^] could be used... Smile | :)

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Resizing controls in CFormview

Sakhalean16-Aug-10 23:23

Sakhalean

16-Aug-10 23:23

Hi,

How to resize the controls in a form view to fit to the availble size.

I have developed one formview application with screen of 1024X768.

When this application runs in another system having more or less resolution
it seems to be ugly.

How to resize the controls in a formview regardless of the resolution?

Re: Resizing controls in CFormview

Nuri Ismail16-Aug-10 23:33

Nuri Ismail

16-Aug-10 23:33