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I don't have those values. Perhaps one of these MSDN articles will be of help:
Q103861
Q188296
Q175644
Q121434
Q172779
Q138786
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Thanks David, got the info i needed in Q103861
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For some reason, Visual Studio 6 is not recognizing the VK_* virtual key codes as being defined, even though they should be defined by default, and I added the line #include <winuser.h> and even added the .h file to my project... bah! What should I try? Thanks!
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What key? Post the code and the error.
Kuphryn
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I'm having trouble comparing two Floating Point Const at Compile time. Here is an example:
const Float64 EducationGoal_Original = 0.0;
const Float64 EducationGoal_1_0 = 1.0;
const Float64 EducationGoal_2_0 = 2.0;
const Float64 EducationGoal_CURRENT = EducationGoal_2_0;
.
.
.
#if EducationGoal_CURRENT != EducationGoal_2_0
// return error
#endif
So...basically if someone adds a new EducationGoal version i want to make sure he updated all the code associated with it.
For some reason, the #if will always return true with floating point #s
Any Ideas?
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I'm not sure that the preprocessor can read into a value of a const...  Anyway, try to replace the const definition by a #define. I know this is not the correct way to create constants, but use it to check if the #if works.
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You can't compare like that. To compare in the preprocessor, you need to #define the constants. const floats are not recognised by the preprocessor. Their "value" is 1 if they exist, and 0 if they do not (I think, from memory). To get this to work, use:
#define EducationGoal_Original (0.0);
#define EducationGoal_1_0 (1.0);
#define EducationGoal_2_0 (2.0);
#define EducationGoal_CURRENT (EducationGoal_2_0);
.
.
.
#if EducationGoal_CURRENT != EducationGoal_2_0
#endif Even better would be to use integers, separated into major and minor version numbers, since floats are not accurate, and comparing them for equality is not a good idea.
Hope this helps,
Ryan
Being little and getting pushed around by big guys all my life I guess I compensate by pushing electrons and holes around. What a bully I am, but I do enjoy making subatomic particles hop at my bidding - Roger Wright (2nd April 2003, The Lounge)
Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late - John Nichol "Point Of Impact"
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Hi all,
I have this big problem:
from an exe written in VB i call a function in a Dll written in VC++. This function must allocate an array of structs ant restitute it initializad to the calling process.
To be more clear I'll write what I would do if the exe is in C++:
The struct could be something like this:
struct _Data
{
int Data1;
VARIANT Data2;
};
In the dll there is a function like this:
extern "C" void WINAPI DLLReadArray(_Data **Array)
{
*Array= new _Data[10];
// For example I fill the array elements whith some data
}
from the VC++ exe I would do something like:
void CallDLL()
{
_Data *Array;
DLLReadArray(&Array);
// Some operations on the array elements...
delete[] Array;
}
NOW:
I do not have any idea on how to do the last thing if the exe is written in VB.
The structure in VB could be declared as a Type ???
Type Data
Data1 As Integer
Data2 As Variant
End Type
How to pass the DLL a "pointer" in VB ????
Please, any help would be very very appreciated !!!
thanks all.
Sorry for my poor english.
Carlo Comino
Italy.
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The only method (that i'm aware of) to pass arrays between VB and VC is via SafeArrays. VB uses SafeArrays internally, so the work is on the C side to unpackage/use the data in this format.
onwards and upwards...
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thank yuo very much for your fast replay !!;)
Do you also have an example of the C part ??
thank you again!!
Carlo.
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Hi all,
i have an ATL project. i've created a dialog that inherites CAxDialogImpl.
in the resources of the dialog i've placed a list control.
is there a class that wrapps it in ATL? same as CListCtrl in MFC???
can any1 help?
thanks in advanced,
Yaron
Ask not what your application can do for you,
Ask what you can do for your application
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Check the WTL header (AtlCtrls.h). There you should find a template <class TBase> class CListViewCtrlT which in turn will be specialized into a CListViewCtrl.
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thanks man.....
Ask not what your application can do for you,
Ask what you can do for your application
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Hello!
I have an application where different groups can do different things. E.g. Group Sales can add an customer. Group Pack can print out a pack order but not add a customer. etc...
I could of cause create my own control system but since Windows already has this kind of system and it is probably much better (security wise) than anything I could create.
How do I use Windows Access Control System in my own application?
I need to be able to create a number of groups and give them rights in my application.
TIA
Anders Eriksson
Sonork 100.21825
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If this is a SQL Server app, I would suggest looking at the TSQL function IS_MEMBER ({'group' | 'role' }). This provides rights / membership checking of both WindowsNT groups and SQL Server Roles.
Otherwise, you can use the NetGroupXXX functions, but your app needs to be running under certain priviledges and this is a pain.
onwards and upwards...
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Anyone know if there is some API for the zip features in XP?
/Magnus
- I don't necessarily agree with everything I say
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_Magnus_ wrote:
Anyone know if there is some API for the zip features in XP?
I don't think so. There are several articles here at CP re. zip/unzip and you can also look at Crypto++ which has this.
Neville Franks, Author of ED for Windows. Free Trial at www.getsoft.com
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I don't quite understand how a buffer works.
I have a PCI card that uses reflective memory
Reflective memory is memory that is connected through a daisy chain on fiber optics, when one PC writes to the memory on the PCI card then the rest of the computers on the daisy chain can read what was written in realtime or as close as you can get to it.
I hope that makes sense.
I am able to choose at what offset I want to start writing data to the PCI cards memory.
ex. offset 0x40 from the beginning of the cards memory.
Then on another PC I can go read the data at that offset 0x40.
The data structure that I have created is that needs to be written to memory is:
The data is continious.
<br />
<br />
struct TSimHeader<br />
{<br />
int SimWriteFlag; <br />
int DisplayReadFlag; <br />
int SignalCount; <br />
int SimStatus;<br />
long TimeStamp;<br />
};<br />
<br />
struct TSimSignal<br />
{<br />
double Min[45]; <br />
double Max[45]; <br />
double Value[45]; <br />
char *Name[45];<br />
char *Unit[45];<br />
};<br />
The functions that read and write the data use a buffer to write and read from (char or int or double or long buf[1024])
How can I put these 2 structures in this buffer so that on the otherside when I read in the data I am able to parse it back out of the structure?
Thanks,
sj
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How about creating a structure
struct TSimBlock<br />
{<br />
TSimHeader header;<br />
TSimSignal signal;<br />
}<br />
then a variable
<br />
TSimBlock *BlockPtr;<br />
then set TBlockPtr to point to the data in the card on the other side and read it for eaxmple by
<br />
i = BlockPtr->header.SimWriteFlag;<br />
Hope I've got all the indirection right, haven't run the code myself.
Elaine ![Rose | [Rose]](https://www.codeproject.com/script/Forums/Images/rose.gif)
The tigress is here 
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Makes sense. I just created a type exactly like the struct that was written.
I then casted the data to the struct type on the other side.
I am then able to read the data just as I was writing it.
Thanks,
For showing me the way.
Sj
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Hello,
I am trying to colorize specific rows of my list control. For this I use the OnCustomDraw member function of CListCtrl to select the color before Windows draws the item. This works very nice, except that the icon's background isn't drawn correctly.
See this screenshot:
http://home.tiscali.de/reichl/temp.jpg[^]
As you can see, the row is highlighted correctly, but the icon's background remains white.
How can I draw the icon's background? 
-Dominik
_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do?? 
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Did you try drawing the background in OnCustomDraw() during the CDDS_ITEMPREPAINT notification? If that doesn't work, try an earlier notification, such as CDDS_ITEMPOSTERASE or even CDDS_ITEMPREERASE (not recommended, but it might work).
Or is the problem that Windows is drawing the white background no matter what you do? If that's the case, the best thing to do would probably be to get the control to draw in a memory DC and change the colour yourself, although that would probably require full owner-draw.
Ryan
Being little and getting pushed around by big guys all my life I guess I compensate by pushing electrons and holes around. What a bully I am, but I do enjoy making subatomic particles hop at my bidding - Roger Wright (2nd April 2003, The Lounge)
Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late - John Nichol "Point Of Impact"
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I tried preerase and posterase, but both don't work. The background remains white. Seems as I really have to draw it myself 
Anyway, thanks for your help
-Dominik
_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??
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