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I'm wondering if I'm doing my message handling all wrong. Currently
when I send my thread a messages (using postthreadmessage from my main
app.) I handling it in the PreTranslateMessage function. While reading
the MSDN I noticed that it said that all messages come in to the run
function and are then passed on to the PreTranslateMessage function.
Is this true? What are the remifications of leaving it like it is if
it's working?
Thanks
Tom Wright
tawright915@yahoo.com
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Hello,
I have this asynchronous pluggable protocol handler (apph) that I'm trying to integrate into a an MFC application.
I've based my view on CHtmlView and call the apph using the Navigate2 method.
This works as expected.
Now, the apph is designed that - at initialization - you have to call a routine to set some variables (current path, ...).
These are statically stored inside the apph to make them persistant for the life of the apph.
The problem I'm facing is this:
After a few minutes of inactivity of my MFC application, MSHTMLED.DLL gets unloaded which also unloads the apph.
Whenever I try to click a link in my MFC application, it will fail from now one, as the apph was unloaded (and the static variables are gone). The apph is automatically loaded after clicking the link though, but the initialization phase is skipped of course.
Question: is there any way so I can MFC in tricking not to unload my protocol handler?
Thanks in advance
Wim
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I beleve not many of you had this kind of problem but if anyone knows what shoud I do it would be great. I am writing an application in Serbian language and that includes writing some non-English letters such as: Š, Đ, Ž, Ć and Č. Everything works fine but with the last two. They look fine inside the code but when I compile it they turn into C. I've tryed with different regional options and different encoding but nothing helped. I'm out of ideas and my deadline is coming closer and closer every day, so if anyone knows how to solve this one please help.
--Nikola--
modified 7-Dec-20 21:01pm.
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While not the best solution, I have found that this type of problem can sometimes be solved by encodeing the value of the character into the string instead of the character itself.
Example: pAcuteC = "\x6A";
Of cource what character is actualy displayed is character map dependent.
I doudt if that helped, but good luck just the same!
INTP
"The more help VB provides VB programmers, the more miserable your life as a C++ programmer becomes."
Andrew W. Troelsen
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I'm reading a text-file. Looks like this:
name= "Test";<br />
mass= 5000;<br />
MountPoints= 3;
In the code I've got this:
label = group + '/';
These variables are of type std::string.
At this point group contains "Vehicle". When label contains "name" or "mass" the label is correctly reseted to "Vehicle/". But when it comes to "MountPoints" it just sets it to ??? (According to the watch in VS). If I in the text-file cut down that row to just "MountPo", it works.  Why??? Anyone knows?
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How big is the variable that you are using to read the file? Seem highly significant to me that Vehicle and MousePo are the same size.
Artificial intelligence is no match for natural
stupidity.
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Hm, I didn't notice that they were of the same length...
I use this to open the file:
ifstream theFile;<br />
theFile.open(fileName);
And this to read:
while (tempChar = theFile.get())<br />
{<br />
...<br />
label += tempChar;<br />
...<br />
}
Both label and group are of type std::string. I thought that these strings adjusted their size as needed.
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Anyone else got any idéas? I really can't figure this out, doesn't use the string-class so often.
If the read label is more than seven characters long, the row
label += group + '/'
makes "label" get the value '???'
"group" contains 'vehicle' at the given moment...
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I wrote a screensaver that mutes the volume using a call to mixerOpen followed by all the other relevant calls to get the ID of the MIXERCONTROL_CONTROLTYPE_MUTE. It works fine on my Windows98 machine, muting the sound perfectly. However it never works on WindowsXP, I believe that the mixerOpen function keeps failing. Does anyone have any ideas of how to mute the sound on XP. Unfortunately I don't have an XP machine that I can develop on.
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If mixerOpen() fails, it will return a specific error code. What is that error code?
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
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mixerOpen() returns 2. I can't look up what MMSYSERR that is right now, as I don't have VC++ on the XP machine. As I said though, it works fine on 98.
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It appears to be MMSYSERR_BADDEVICEID. What does the call to mixerOpen() look like?
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
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Thanks for the help DavidCrow, but I got it fixed now. I was calling mixerOpen like this
if (mixerOpen(&hMixer, MIXER_OBJECTF_HMIXER, 0, 0, 0) != MMSYSERR_NOERROR)
return FALSE;
It worked on Windows98, but not on XP, only when I re-read the documentation did I change the second parameter to 0.
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I am a beginner at Visual C++. I created an editbox with an dword variable. I would like to enter hexadecimal values in the format for example 004FD210 and i want the corresponding variable for the editbox or (maybe with a small code others) to have corresponding decimal value. I thought to read into a string andthen to convert it to integer value. But is there a shorter way. Pls.
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converting string to interger: value strtol(), strtoul().
converting interger value to hex string: sprintf(pStr,"%X",nValue).
If you want to convert to hex string with leading 0's:
sprintf(pStr,"%8.8,X",nValue); // 00000000
Or
sprintf(pStr,"%*.*,X",8,8,nValue); // 00000000
I believe those should work for ASCII formated string.
INTP
"The more help VB provides VB programmers, the more miserable your life as a C++ programmer becomes."
Andrew W. Troelsen
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Hi all,
I am writing a program that continuously stores data from an external memory.
while(isConnected)
{
// Do stuff over here
}// end while
However, when it runs, it takes all the memory (program is not responded).
I have another button (Stop) to call method to set isConnected to False in order to get out of the loop. However, I didn't even have a chance to hit that button because the program is freezed.
Any suggestions? Thanks.
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Use a worker thread. If you don;t thread the application, then the reason you're locking the program up is because the Message Loop never has the chance to run, and therefore the button press is never noticed. Use a thread for the user interface, and one to do the loop.
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An alternative is to pump the message queue every n iterations of the loop. There is no need to create a worker thread.
Tim Smith
I'm going to patent thought. I have yet to see any prior art.
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Hello,
I'm writing to ask some explanations on the excellent article "Using Custom Controls in a Dialog Bar" by Douglas R. Keesler, see http://www.codeproject.com/useritems/DerivedDlgBar.asp. Maybe that I did not understand everything, I'm french and my english is not so good.
So my matter is about how to create a menu in a CDialogBar :
I have made a little MDI which has got a CDialogBar with VC++6.0 .
In this class, I want to put a Menu.
So I made that you said :
- create a CDialogBar : IDD_DLGBAR_TEST,
- create a Menu in my ressource : IDD_DLGBAR_TEST,
- create the class MyDlgBar (import files MyDlgBar, remove file.clw and clic on ctrl+w to wizard VC6.0 as he said)
- select to this ressource the classe MyDlgBar
- put in the class CMainFrame the instance : CMyDlgBar m_dlgBarTest
- put the creation of this box in the create function of the CMainFrame with :
m_dlgBarTest.Create(this, IDD_DLGBAR_TEST, <br />
CBRS_RIGHT | CBRS_GRIPPER |CBRS_TOOLTIPS | CBRS_FLYBY | CBRS_HIDE_INPLACE,<br />
IDD_VIEW_MENU_DLGBAR)
- I put, in the message map of my CMainFrame, the 2 lines :
ON_COMMAND_EX(IDD_VIEW_MENU_DLGBAR, OnBarCheck)<br />
ON_UPDATE_COMMAND_UI(IDD_VIEW_MENU_DLGBAR, OnUpdateControlBarMenu)
- then I compile and I built my application.
When I execute this application, I have got :
- the main frame
- the floating dialog box (CDialogBar)
But I haven't got the menu of this floating box !
I search in the source of the demo project but I don't see the menu that we could see in the article.
Perhaps the autor forgot to write something to realize a menu in a CDialogBar?
Or perhaps I don't understand all ...
Could you explain to me how to realize it ?
Thanks very much to help me ! 
Alice
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Maybe this will be disappointment for you but child window cannot have menu. Since dialog bar is a child window (either main frame or floating frame) it will not show menu.
JohnCz
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How does one implement undo functionality in a Vc++ environment . Always is a definete wish list thing but dont have a clue as to how to implement it .
Engineering is the effort !
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I would start by typing "Undo" (sans quotes) in the search bar on the top of this page (directly under Bob) and read the articles that are listed.
"You're obviously a superstar." - Christian Graus about me - 12 Feb '03
"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04
Within you lies the power for good - Use it!
Honoured as one of The Most Helpful Members of 2004
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since "undo" is a vast and sometimes complex domain, I suggest that you examine the following :
Undoing an operatation depends on the way the operation was done initially.
for example, you do a "create something" operation/command, the undo operation/command might simply be a cut or a remove, or worse, an "uncreate something"; do after that, if you go furher, what is the undo of the undo ( redo ); is it do a "create something" again ? or a paste or something ?
in my opinion, a good undo/redo system depends on the way you handle the different commands ( or actions) in your application.
for example, in a DB, you create a new record, the command that creates the record should contain as much context as possible so that you can recreate the record without any user action.
if you look from the other side.
you remove a record and do an undo, what is the result command ? is it a "create record" or something like a "paste" ?
...
so there are a lot going on here...
Maximilien Lincourt
Your Head A Splode - Strong Bad
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Im having this wierd problem regarding outputing a file in the same path as the .exe, whenever i save the settings for my app it always save it to the desktop i have no idea why...its suppose to save it in the same path as the exe.. this is the first time ive had this kind of problem, this is almost the same code i always use and yet its not working the way it should be i dont know why..
heres the code
heres the defined values:
#define FILENAME_S "settings.ini"
#define STRINGi "Font=%s\nFont_Size=%d\nShow_Margin=%d\nShow_Toolbar=%d\nShow_Workspace=%d\nShow_Status=%d\nFile1=%s\nFile2=%s\nFile3=%s\nFile4=%s"
This is part of this FILESTUFF CLass
int FILESTUFF::saveIni( SETTINGS *st )
{
FILE *file;
if( ( file = fopen( FILENAME_S, "w+" ) ) == NULL )
return 0;
stripSpace( st->font, 1 );
stripSpace( st->file1, 1 );
stripSpace( st->file2, 1 );
stripSpace( st->file3, 1 );
stripSpace( st->file4, 1 );
fprintf( file, STRINGi , st->font, st->fontSize, st->showMargin, st->showToolbar, st->showWorkspace, st->showStatusBar, st->file1, st->file2, st->file3, st->file4 );
loadIni( &*st );
fclose( file );
return 1;
}
int FILESTUFF::loadIni( SETTINGS *st )
{
FILE *file;
if( ( file = fopen( FILENAME_S, "r+" ) ) == NULL )
return 0;
fscanf( file, STRINGi , st->font, &st->fontSize, &st->showMargin, &st->showToolbar, &st->showWorkspace, &st->showStatusBar, st->file1, st->file2, st->file3, st->file4 );
stripSpace( st->file1, 0 );
stripSpace( st->file2, 0 );
stripSpace( st->file3, 0 );
stripSpace( st->file4, 0 );
return 1;
fclose( file );
}
I have no idea
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