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ok, i've modified my code. i only have one teeny tiny little bug. Say a user selects the 3rd option in a combo box. if the user goes to another page in the property sheet, the 3rd option remain selected. if a user closes the dialogbox, and reopens it, the 3rd option remains selected.
however, if the user closes the program, and loads the dialog box back up, the first option is selected. now here's the punch line: if the user moves to another tab in the propertysheet, then goes back to the one with the combo box, the 3rd option will be selected again.
funky, eh? its only when the propertysheet is first opened the fuirst time the app is launched does the first option appear selected. I've for input_tq.SetCurSel() functions up the wazoo, all over my program.
any ideas?
(and if i look in the text file where the values are stored, the value for the 3rd option is there, not the 1st. its wierd.)
*.*
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What you need to remember is that in a property sheet, the actual page window is not created until that tab is selected for the first time. Could this have some impact on your issue?
onwards and upwards...
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i'll bet thats it. i tried putting setcursel() right before my domodal, but the linker didnt like that. and since i dont use oninitdialog...
bleh, its friday, ill be back opn monday. 
Edit: Why does an edit control show saved data the first time the page is displayed, but a combobox doesn't?
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keegan wrote:
i tried putting setcursel() right before my domodal, but the linker didnt like that.
The linker couldn't care less in what order you've called a set of functions. But, given that the dialog window, nor any of its controls, exist prior to calling DoModal(), the call to SetCurSel() would indeed cause an assertion to fire.
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ok, so if it goes ebfore the page is displayed, and after its created, where does it go? :-/
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Well, the initialization code can either go in OnSetActive(), or since it is derived from CDialog, the code can also go in OnInitDialog().
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How can I stop a program from running if the escape key was hit.
Can I set it up so I can choose what key stops the program ie. "8 key"
thanks,
sj
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if you're at a point in the program where a user can go a few ways, ie stop the program, continue, do this, do that, you can use _getch() and make a switch statement off what key the input. i dunno if thats what you want, if it is, i can post an example how to do it.
meh, ill post an example anyway
<br />
int c;<br />
c = _getch()<br />
switch (c)<br />
{<br />
case 0x1b
return 0;<br />
break;<br />
<br />
case 0x38
[...].br />
break<br />
}<br />
i used that code in a program that asked a user to hit escape to terminate the program or space to continue. it works
PS. you need <conio.h> to use _getch()
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where can I find a list of the hex values for each key?
sj
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http://www.asciitable.com/
Hx is the collumn you want, the key is in red
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welcome 
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I have written a DLL which has a function defined as:
DllExport double getDouble( const char * );
In a C# class I have linked to the DLL as follows:
[DllImport( "CurrConv.dll", CharSet = CharSet.Ansi )]<br />
protected static extern double getDouble( IntPtr m_ptrDataBuffer );
The problem I am getting is that when I get to the line:
double number = getDouble( m_ptrDataBuffer );
I get the following error:
"Unable to find an entry point named getDouble in DLL CurrConv.dll"
Can someone please explain where I am going wrong, and how to resolve the problem.
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The crux of the problem is likely in the C declaration of the function. This determines how the function name is exported.
I'd try:
extern "C" __declspec(dllexport) double getDouble( const char * );
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br />
Peter Weyzen<br />
Staff Engineer<br />
Santa Cruz Networks
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I construct a propery page which I added OnActive() and OnKillActive() by class wizard. When I added OnNotify() to the class, I have not received message to trigger OnActive() and OnKillActive() anymore. Is there anyway to both functions triggered even I use OnNotify()?
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What messages does the program process in OnNotify()? I suspect that the message gets destroy inside OnNotify().
Kuphryn
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All I did is I tried to detect right mouse click on richedit control located on my property page. It shoudn't intercept both OnSetActive() and OnKillActive() messages. Please let me know if I did something wrong here.
BOOL CPropertyPage::OnNotify(WPARAM wParam, LPARAM lParam, LRESULT* pResult)
{
MSGFILTER * lpMsgFilter = (MSGFILTER *)lParam;
if ((wParam == IDC_RICHEDIT1) &&
(lpMsgFilter->nmhdr.code == EN_MSGFILTER)&&
(lpMsgFilter->msg == WM_RBUTTONDOWN))
{
.
.
.
.
}
return CDialog::OnNotify(wParam, lParam, pResult);
}
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Relative C++ and especially VC++ and working with Windows newbie (most previous experience is embedded).
Here's the scenario:
Here's what I want: one class called MonitorClass, and this class should instantiate a bunch of specific montitors underneat underneath it.... monitor1, monitor2, monitor3, etc.....
The "system" will start up the Monitor class which runs in a loop all the time monitoring each specific monitor underneath.
We also have seperate tests that will come into existence that may need to monitor some of the same things....so these tests should go through the MonitorClass to get a Sample() from any specific monitor.
Since we want all to go through the same guy...I'm thinking we want MonitorClass in a DLL (I've never played with DLLs much) so that it is in memory only one time and all go through him.
Can I make a DLL that is essentially a class ? Or must it be nothing more than a collection of functions?
Or...can you understand the problem enough to give a better solution?
There are only 10 types of people in this world....those that understand binary, and those that do not.
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What are you going to do with the results of the sampling/monitoring? If it is just going to be logged somewhere (file/db), and you always need this running, you may want to consider developing this as a service.
onwards and upwards...
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KingTermite wrote:
Can I make a DLL that is essentially a class ? Or must it be nothing more than a collection of functions?
The DLL can be a collection of exported functions, or it can be a collection of exported classes.
From what you describe, however, I see no reason why you need a DLL. Unless the code needs to be shared between two or more applications, you'd be fine putting it all in one EXE.
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Yes, it was going to be shared by more than one exe.
We talked at more length with the designer of some other code (drivers) being used which was part of the reason we thought we needed it in a seperate DLL anyway.
It turns out the restrictions were not as deep as we thought and we can stick with the static libraries we already have for the monitors.
Thanks for the input all, regardless.
There are only 10 types of people in this world....those that understand binary, and those that do not.
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Simple answer is "Yes, you can make a DLL export a class". It will tie you into only using one
compiler with that DLL, but this isn't a big restriction most of the time.
You'll want to look up __declspec(export) / __declspec(import) in the MSDN library.
But each instance (EXE / DLL) using your DLL would have a fresh "copy" of the DLL, so you would
get lots of monitors. You can do tricks to make them each refer to a single one, but that gets
a bit too deep.
This sounds like a good project for a COM object. This makes a singleton easier to implement
(look on this site for examples), and means you could use the Monitor from VC++, VB
etc.
I would also think about Event Sinks to inform interested programs of changes in the
real world stuff you are monitoring.
If you have to poll the real world to check on a change, try creating a separate thread which
wakes up at regular intervals briefly.
Good luck, as this is a non-trivial learning curve...
Your experience is the opposite of mine. I've been playing with windows for years, and only
recently had to attack an Arm board...
Iain.
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I want to manage some of my radio buttons and some of my static texts have colored text when the dialog receive a certain message, but other controls donot.
How to do this?
thanx.
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Take a look at CP, there are lots of articles regarding on this in the Static and into other sections...
Hope this helps...
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What is the problem? What do you want to accomplish?
Kuphryn
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