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Actually I want to capture the screen whenever it is updated. I know how to capture the screen and store it as bitmap file but I don't know when to capture...I mean how can my program can know about the screen change. Please help me......
C.R.Naik
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If any program on your desktop recieves WM_PAINT then the screen has changed. If you're hoping to capture video, you're better off to go for 15 fps, I mean, if it only captures on change, the end result will be rather jerky....
Christian
We're just observing the seasonal migration from VB to VC. Most of these birds will be killed by predators or will die of hunger. Only the best will survive - Tomasz Sowinski 29-07-2002 ( on the number of newbie posters in the VC forum )
Cats, and most other animals apart from mad cows can write fully functional vb code. - Simon Walton - 6-Aug-2002
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you get a strange error message when you post as 'Anonymous'. Instead, a message telling you need to choose a nick would be better?
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This problem has been fixed.
cheers,
Chris Maunder
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I have a frame window with a menu. when i click one menu item, dialog is created. Now after entering some values into the dialog, i click "OK". here i have a problem. That is, I want to get a field value of the dialog into my frame window. This is the code for the command handler.
void MyCFrameWnd::OnDialog1(){
userDialog1 dlg1;
dlg1.DoModal();
// In this handler i want to get a value from
// the dialog
}
Please help me asap
Thanking you
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Use the DDX features to capture data for your dialog.
Basically this will allow you to assign the edit fields and other controls of your dialog to a member variable that you create in the userDialog1 class.
Then after you call DoModal, you will be able to access the member variables of that class and grab the data that you need.
Build a man a fire, and he will be warm for a day
Light a man on fire, and he will be warm for the rest of his life!
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In your userDialog1 you make control variables for each control to be visible. That is eg. for a Edit-field you have a variable of type CEdit.
Class Wizard can help you with this.
Then, after DoModal() returned with IDOK, you can access the contents of the Edit-field.
Hope this helps
P.S. DDX is evil...
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hi,
I'ld like to create a CListCtrl object using Create(...) in my CView class.
The function declaration for Create is:
BOOL CListCtrl::Create(DWORD dwStyle,const RECT& rect,CWnd* pParentWnd,UINT nID)
Can someone tell me what's meant by nID (fourth argument) and how to set that value??
Thanx in advance...
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just what it sounds like - it's a number you can use to identify the control by, for instance when using GetDlgItem() or identifying it as the source of notification messages. It can be whatever number you feel like using, although if you plan on actually making use of it then it should be unique amoung the other controls on your form.
---
Shog9
Actually I use to find learning in bars when drinking really useful.
It sort of makes a language liquid. - Colin Davies, Thinking in English?
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Hi,
thanx for that info...
now, i created a CListCtrl using the following code:
<br />
CListCtrl* m_ctrlMesgList = new CListCtrl();<br />
CRect rect(0,650,800,800);<br />
<br />
m_ctrlMesgList->Create(LVS_ALIGNLEFT | LVS_REPORT, rect, this, 1);<br />
m_ctrlMesgList->InsertColumn(0,"Date",LVCFMT_LEFT,-1,-1);<br />
m_ctrlMesgList->InsertColumn(1,"Time",LVCFMT_LEFT,-1,-1);<br />
The problem is, no listctrl is created. This piece of code is in CView::OnInitialUpdate()
Thanx in advance...
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tulc_kris wrote:
m_ctrlMesgList->Create(LVS_ALIGNLEFT | LVS_REPORT, rect, this, 1);
Did you check the return value? What was it?
Anyway, you'll probably want a few other styles. Definately add WS_CHILD|WS_VISIBLE. You may also want WS_BORDER.
---
Shog9
Actually I use to find learning in bars when drinking really useful.
It sort of makes a language liquid. - Colin Davies, Thinking in English?
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Hi All,
I have 2 separate applications say X1 and X2,
X1 receives all the data and stores it in a file now this file should be opened through X2
Consider for example,
GetLogic() fn. in X1 gets the logic from the device and stores it into a file and immidiately this file should be opened through X2
This should happen at run time
User intervention will come only once when he selects GetLogic()
I beleive that DDE should be made used but anyone can explain me the procedure or if there is any other method??
Thanks
Uday
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DDE is somewhat of an outdated technology, there are better ways to do interprocess communication in Win32. You could do a number of things to signal your app X2 that the file has been written by X1 including the following:
1. X1 can find a windows handle to your X2 app and send that window a message when it completes its task.
2. Both apps would register a custom message with the function "RegisterWindowMessage". Both apps would pass in a special string that hopefully only your app will register, and when X1 completes its task, it can broadcast the message that is returned from the api and X2 should handle that message.
3. Create a named event in both applications, and X2 will user WaitForSingleObject or some other wait function and wait for the event that you create.
I think I would choose solution 3. There are other possibilities as far as application synchronization, these are just a few that I thought of off the top of my head.
Good Luck
Build a man a fire, and he will be warm for a day
Light a man on fire, and he will be warm for the rest of his life!
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How to automatically close the view after clicking print button on (file print)preview window?
After calling OnEndPrinting(), the frame will call OnDraw() automatically so that I write pChild->PostMessage(WM_CLOSE) in it.
When printing job is little(a few pages) is OK, but if printing hundreds pages, the problems occur (MFC42D.dll violation). The problem I suppose is because CDC* pDC of OnPrint(CDC* pDC, CPrintInfo* pInfo) is sent to printer very slowly(I can read page number from print dialog), when OnDraw() is executed, view is destroyed, so that pDC is no more existed.
if I delete pChild->PostMessage(WM_CLOSE) from OnDraw(),
no problem at all but blank view will show(no code in OnDraw()).I can close view by clicking close button(upper right corner of window) but this is not allowed.
I also try to hide this view but it doesn't work if program run dozens time(memory leak).
I try to solve this problem for weeks but ...
Please give me your advice. Thanks a lot
YJ
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Im having trouble putting icons or other pics such as bmp's or such, for they can display as the output.
I appreciate it, thanx.
-Masta G-
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Output where ? Screen or printer ?
Christian
We're just observing the seasonal migration from VB to VC. Most of these birds will be killed by predators or will die of hunger. Only the best will survive - Tomasz Sowinski 29-07-2002 ( on the number of newbie posters in the VC forum )
Cats, and most other animals apart from mad cows can write fully functional vb code. - Simon Walton - 6-Aug-2002
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Yup, on the screen.
-Masta G-
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Use ::LoadImage ( or GDI+ ) then in WM_PAINT, BitBlt them to the screen.
Christian
We're just observing the seasonal migration from VB to VC. Most of these birds will be killed by predators or will die of hunger. Only the best will survive - Tomasz Sowinski 29-07-2002 ( on the number of newbie posters in the VC forum )
Cats, and most other animals apart from mad cows can write fully functional vb code. - Simon Walton - 6-Aug-2002
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Tomasz Sowinski,Thank you for your reply.
I write the code according to you:
...
#define _WIN32_WINNT 0x0500
#include "winuser.h"
...
but it report the same error "undeclared identifier".
is there other reason?
Thanks again!
Hi
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You will probably need the latest SDK header files. If you do now want to download the Win32 SDK, you can simply include this definition in order to define the function:
UINT WINAPI SendInput(
UINT nInputs,
LPINPUT pInputs,
int cbSize
);
If you include this declaration, and you are not using any other functions that use the version 0x500 headers, then you can set WINVER back to 0x400.
Just incase you didnt know this, by using this function your program will not run on windows 95.
Good Luck
Build a man a fire, and he will be warm for a day
Light a man on fire, and he will be warm for the rest of his life!
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I remember reading somewhere (can't find it now  ) that when you call WaitForSingleObject on an handle the thread already owns (a MUTEX for instance), the function returns with WAIT_OBJECT_0.
If this is true, do I have to call ReleaseMutex the same amount of times, or is once enough to give up ownership?
Also, is there a way to know if we own a given resource (HANDLE)?
Michel
It is a lovely language, but it takes a very long time to say anything in it, because we do not say anything in it, unless it is worth taking a very long time to say, and to listen to.
- TreeBeard
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From the ReleaseMutex() docs:While a thread has ownership of a mutex, it can specify the same mutex in additional wait-function calls without blocking its execution. This prevents a thread from deadlocking itself while waiting for a mutex that it already owns. However, to release its ownership, the thread must call ReleaseMutex once for each time that the mutex satisfied a wait.
--Mike--
Just released - RightClick-Encrypt v1.3 - Adds fast & easy file encryption to Explorer
My really out-of-date homepage
Sonork-100.19012 Acid_Helm
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I've never used templates very much even though I've been programming in C/C++ for many years. I have a class whith quite a few methods that have three arguments, like this:
int foo(int x, int y, char* string);
Now, I'd like to be able to generalize this a bit more so that it would do something like this:
int foo(int x, char* string);
or
int foo(int x, int y, int z, char* string);
One way, of course, to make the above just one function would be to rearrange to parameters, like this, and use varargs to extract the parameters:
int foo(char *string, ...);
I've been thinking that this may be a good candidate for a template. Instead of writing a class to take care of all possible combinations of parameters, it it possible to write a template class to handle it? If so, how would you rewrite the above lines ?
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