|
a. It is unlikely you are right, because that would require the window to be invalidated in order to redraw, and in fact you would still need to get the window using WindowFromPoint, and figure out which word in a sentence was under the mouse. Also, the commerical apps that do this use OCR, because they can read words off bitmaps. Either way, what you propse is mind numbingly more complex - why wait for a draw command once you know the window when you can just ask it directly ?
prog7584 wrote:
by the way, i want to know how to implement it in detail.
b. Like I said, you and everyone else who asks this stupid question. I propse we add to the FAQ the fact that an answer is not going to be forthcoming, anymore than an answer would be given if I asked 'How can I write a first person perspective shooting game' - the answer is build an engine, create some models and animate them with algorithms to ensure the laws of physics are obeyed. What you're asking is similarly too complex to answer in a forum, except broadly, as I have done. You have some other ideas, that's fine. Like everyone else who asks you didn't answer when I asked why you would want to do such a thing, and that's fine. But no-one is going to find an answer to your question, any more than they did the last 57 people who asked. If you have a need to do this, and an idea how, then give it a go and ask questions when you get stuck on something.
You're asking how to do something complex enough that people who have done it sell an app that does exactly what you said and no more.
Christian
After all, there's nothing wrong with an elite as long as I'm allowed to be part of it!! - Mike Burston Oct 23, 2001
Sonork ID 100.10002:MeanManOzI live in Bob's HungOut now
|
|
|
|
|
I don't know just how possible what you want is but I can point you to some APIs that may help you:
GetCursorPos -- gets the current cursor position in a POINT structure
WindowFromPoint -- gets the handle of the window at the given POINT location
GetWindowText -- gets the "window text" for a given window
The problem is that GetWindowText will ony work well if the mouse is over a title bar or an edit box. Otherwise it's not gonna be reliable.
Hope to have helped and good luck,
Alvaro
|
|
|
|
|
I am running into a problem with a Wizard that my activeX control has...The problem occurs when the user reaches the last dialog box, forgets to enter a value in one of the dialog boxes and presses finish. A message box pops up, telling the user that they must enter a value, but as soon as the user clicks OK, the Wizard and IE lose focus and the last minimized app comes on top. This does not happen in any of the previous Wizard pages. Any ideas how I can go about setting the focus back to this last page?
BTW, I have tried all kinds of setFocus variations...
This is the code in the OnWizardFinish BTW:
BOOL CAddControllerPage4::OnWizardFinish()
{
if(m_nFlag == -1)
{
m_nFlag = 0;
m_ErrorObject.PromptError(12060); // this prompt
// error using
//AfxMessageboxDirect
return 0;
}
else {
return CPropertyPage::OnWizardFinish();
}
}
thanks
|
|
|
|
|
Hi,
I’ve a application which I want to start at machine start up. I’m using Task Scheduler to schedule this application. I’ve tried sample (MSJ Feb 99)Feb99CQA.exe. Problem is even though Task Scheduler is running as interactive service; I do not see any UI. Task Manager shows my application running but it does not display any UI. I tried running notepad but the result is same. Basically I’m not getting TaskbarCreated message in my application. What else I need to do to see ui / ShellNotifyIcon? I’m aware of concept of Windows WorkStation and desktop. Is it possible at to do?
I would appreciate any suggestions regarding this.
Thanks
|
|
|
|
|
Hello. After a couple days of fitful studying of DLLs I still have one question that I can't seem to find hte answer for:
I know the functions in a .DLL can do pretty much whatever they want, but how do I let the main program (that linked to the .DLL) know that something has happened in the .DLL. Specifically I want the keytrapping hook to let the keycounting program know "a key was just pressed". Is PostMessage the answer?
-Jason
nirgle.bitdevil.com
|
|
|
|
|
Wait a second. Would it make more sense to have the .DLL increment a variable local to IT every time a key is pressed and the hook is called, and then export a function to return (and then reset) this value, so the main program can just call this func when it wants to, rather than the .DLL telling the program when it feels like it?
-Jason
nirgle.bitdevil.com
|
|
|
|
|
There are a number of ways of letting a program know that something happened. They vary in complexity and flexibility. Some of them are:
- callback functions
- posting a custom message to a window
- posting WM_COPYDATA to send data + notification
Hope this helps and that I'm not stating the obvious.
/ravi
"There is always one more bug..."
ravib@ravib.com
http://www.ravib.com
|
|
|
|
|
Ravi Bhavnani wrote:
posting WM_COPYDATA to send data + notification
Hey thanks for that! That's what I love about this site - you constantly pick up little scraps of information that will prove useful.
________________
David Wulff
http://www.davidwulff.co.uk
"I loathe people who keep dogs. They are cowards who haven't got the guts to bite people themselves" - August Strindberg
|
|
|
|
|
Posting (PostMessage) a WM_COPYDATA message is NOT recommended.
Use SendMessage or SendMessageTimeout instead.
--------------------------------------------------
If my messages appear curt, I apologize.
I try to be brief to save your time as well as mine.
--------------------------------------------------
|
|
|
|
|
Gert is absolutely right. Use SendMessage() instead of PostMessage() when delivering WM_COPYDATA. My mistake!
/ravi
"There is always one more bug..."
http://www.ravib.com
ravib@ravib.com
|
|
|
|
|
I guess you could give the dll an interface to the main program. Just a pointer to an instance of some class with some functions to process input from the dll. This is the way 3d Studio VIZ handles plugins.
WAVK
|
|
|
|
|
I've done it a different way (but thanks to all who answered). When I call the Init function in the .DLL I pass the handle of the window of my prog. Then the key function just sends a message to the main program that a key was just pressed. I use ::PostMessage(), and if I lose a key every now and then, it won't be missed among the million-or-so other keys a month I type.
I can't wait to actually get this project going because I want to start letting the world know about it!
-Jason
nirgle.bitdevil.com
|
|
|
|
|
I'm trying to look for some tuts or sample apps that use radio buttons. Ihave 2 radio buttons on my dialog, and need to disable certain controls when one or the other is selected, depending on what is selected.
If anyone knows of any good sites that may have what I'm looking for or if anyone could provide insight or maybe a quick sample about what I'm trying to do, I would really Appreciate it.
Thanks so much in advance.
Digital Khaos
"Every problem has a solution" --unknown
|
|
|
|
|
Go to the resource editor, and make sure you have the wizard bar visible. Click on a radio button and the drop down will let you add an OnClick handler for that button, which you can then use to enable/disable items to your hearts content.
Christian
After all, there's nothing wrong with an elite as long as I'm allowed to be part of it!! - Mike Burston Oct 23, 2001
Sonork ID 100.10002:MeanManOzI live in Bob's HungOut now
|
|
|
|
|
OK, I suppose I'm looking for an API function or MFC function that is actually responsible for disabling controls?
Digital Khaos
"Every problem has a solution"
|
|
|
|
|
Well, you didn't say you needed to know *that* part as well. 
Every CWnd derived class has a method called EnableWindow, which takes a BOOL.
Christian
After all, there's nothing wrong with an elite as long as I'm allowed to be part of it!! - Mike Burston Oct 23, 2001
Sonork ID 100.10002:MeanManOzI live in Bob's HungOut now
|
|
|
|
|
OK, you'll have to pardon my lack of knowledge but doesn't EnableWindow() actually enable/disable the entire window? Where as I'm looking to enable/disable only a specific control in the window. Unknowingly i did:
void CPro1WinTUSDlg::OnMainDataRadio()
{
EnableWindow(IDC_EDIT1==TRUE); // or FALSE
}
As you know, whis doesn't produce the correct results. It actually disables my entire program, or at least locks it up (heh).
Sooooo, am I doing something wrong or do I need to use a different function?
Thanks!!!
Digital Khaos
"Every problem has a solution"
|
|
|
|
|
Yes, you want to disable the control, which is also CWnd derived. So you need to create variables that map to your controls and then call EnableWindow on them.
Christian
After all, there's nothing wrong with an elite as long as I'm allowed to be part of it!! - Mike Burston Oct 23, 2001
Sonork ID 100.10002:MeanManOzI live in Bob's HungOut now
|
|
|
|
|
Do this:-
GetDlgItem (IDC_EDIT1)->EnableWindow(FALSE)
Nish
Sonork ID 100.9786 voidmain
www.busterboy.org
If you don't find me on CP, I'll be at Bob's HungOut
|
|
|
|
|
I tend not to use GetDlgItem, but you're right, given the method you want is in the base class, it's as good a way of doing it.
Christian
After all, there's nothing wrong with an elite as long as I'm allowed to be part of it!! - Mike Burston Oct 23, 2001
Sonork ID 100.10002:MeanManOzI live in Bob's HungOut now
|
|
|
|
|
Yeah, true. After raeding a couple of articles by Joe Newcomer I have always tried to avoid GetDlgItem and UpdateData in my code, specially being a big fan of Joe, that I am.
A lot of people seem to forget that we can use class wizard to create control variables for our dialog controls. I mean most people would have associated CStrings with text boxes but how many associate an edit box with a CEdit?
Nish
Sonork ID 100.9786 voidmain
www.busterboy.org
If you don't find me on CP, I'll be at Bob's HungOut
|
|
|
|
|
It was Paul DeLascia who pointed it out to me, in an MSJ article.
Nish [BusterBoy] wrote:
I mean most people would have associated CStrings with text boxes but how many associate an edit box with a CEdit?
I almost *always* associate with a control, not a variable. Then I can roll my own data validation, which is always better than the rubbish MFC comes out with.
Christian
After all, there's nothing wrong with an elite as long as I'm allowed to be part of it!! - Mike Burston Oct 23, 2001
Sonork ID 100.10002:MeanManOzI live in Bob's HungOut now
|
|
|
|
|
I use GetDlgItem and UpdateData all over my code for too many years. I haven't read Joe's writings on why they're bad. Can you briefly tell me the problem?
I guess it's habit - it's how I was shown a long time ago. It appears to work well though. Is it considered bad style now?
thx
|
|
|
|
|
See these two articles by Joe :-
http://www.codeproject.com/cpp/nogetdlgitem.asp
http://www.codeproject.com/cpp/avoidupdatedata.asp
Nish
Sonork ID 100.9786 voidmain
www.busterboy.org
If you don't find me on CP, I'll be at Bob's HungOut
|
|
|
|
|
What if I want to add,delete,update resources in my exe file on Windows 9x.
The APIs BeginUpdateResource only work on WinNT and others.
So is there any way that my exe file can update resources of another exe.
Plz help me if you know.
In my dream, I was dorwning in my §orrow§
But my §orrow§, they learned to §wim
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
