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I don't know if this is relevant or helps in any way, but...
Testing on XP Pro SP2, Unicode DLL build:
During the SetWindowsHookEx() call, I get a "Data Execution Prevention" dialog with the message
"To help protect your computer, Windows has closed this program"
HookProc() is never callled.
Non-Unicode build runs fine.
Mark
Mark Salsbery
Microsoft MVP - Visual C++
"Go that way, really fast. If something gets in your way, turn."
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If I run the release Unicode build on XP Pro SP2, I get an unhandled exception in explorer.exe. But the log file I create (c:\log.txt) has output from HookProc():
SetWindowLong() returns 1001b1f. NewWndProc is c412e0. Thanks for taking a look. I guess I'll just stick with the ANSI build.
-- modified at 16:01 Sunday 22nd July, 2007
HookProc() needs to be _stdcall. Once I did that, the Unicode build worked.
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Can someone tell me how big the BLUETOOTH_RADIO_INFO struct is? I believe it's 272. I'm trying to convert this into C# and I need to know the size...
typedef struct {<br />
DWORD dwSize;<br />
BLUETOOTH_ADDRESS address;<br />
WCHAR szName[BLUETOOTH_MAX_NAME_SIZE];<br />
ULONG ulClassofDevice;<br />
USHORT lmpSubversion;<br />
USHORT manufacturer;<br />
} BLUETOOTH_RADIO_INFO;<br />
<br />
typedef struct _BLUETOOTH_ADDRESS {<br />
union {<br />
BTH_ADDR ullLong;<br />
BYTE rgBytes[6];<br />
};<br />
} BLUETOOTH_ADDRESS;<br />
<br />
typedef ULONGLONG BTH_ADDR;<br />
#define BLUETOOTH_MAX_NAME_SIZE (248)<br />
<br />
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Using the information you gave, using default packing [8] and using sizeof(), I come up with 520.
(I confirmed this compiling against the Windows Server 2003 R2 Platform SDK)
(Note that szName is WCHAR, so it has to be at last 496.)
Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke
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sizeof(BLUETOOTH_ADDRESS) == 8
sizeof(BLUETOOTH_RADIO_INFO) == 520
As Joe mentioned, if you'll be passing between C++ and C#, make sure packing/alignment are the
same on both platforms.
Mark
Mark Salsbery
Microsoft MVP - Visual C++
"Go that way, really fast. If something gets in your way, turn."
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class Car<br />
{<br />
public:<br />
virtual ~Car() {delete itsCarb;}<br />
private:<br />
Carburetor* itsCarb<br />
};
Why is the destructor virtual here?
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class FastCar : public Car
{
public:
virtual ~FastCar() { delete itsTurbo; }
private:
Turbo* itsTurbo;
}
FastCar* ferrari = new FastCar();
Car* car = ferrari;
delete car;
I think without the virtual destructor, FastCar's destructor would never get called if it's deleted using a pointer to a base class.
- S
50 cups of coffee and you know it's on!
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Car should have the virtual destructor. It doesn't matter if FastCar has one or not, unless you plan to extend that too.
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True, but I was planning on writing a ReallyFastCar! 
- S
50 cups of coffee and you know it's on!
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tom groezer wrote: Why is the destructor virtual here?
To ensure that the destructor from the most derived class will always be called.
"A good athlete is the result of a good and worthy opponent." - David Crow
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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Wouldn't it be better to do a search first?
Now, asking questions and such is perfectly fine, but I see 5 of your questions on the first page, and this one in particular, is a rather common topic.
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Basically my question was whether virtual destructors could be used even if you do not have virtual functions in base classes. In the example that I have put I have not put any of the virtual functions.
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The rule of thumb is that classes designed to be base classes that are used polymorphically should have virtual destructors. Classes such as yours without any virtual functions do not require a virtual destructor. Using a virtual destructor in this case wastes some bytes.
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tom groezer wrote: Basically my question was whether virtual destructors could be used even if you do not have virtual functions in base classes.
That's all well and good, but you asked the same question here.
"A good athlete is the result of a good and worthy opponent." - David Crow
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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How to get the text from the edit box of another application
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Send it a WM_GETTEXT message.
"A good athlete is the result of a good and worthy opponent." - David Crow
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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Hi thx,
Can u expalin a bit more how to use this
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You need to a handle to that window.
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Knowing how to handle messages (both sending and receiving) is paramount in understanding the very basics of Windows development.
"A good athlete is the result of a good and worthy opponent." - David Crow
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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Has anyone ever seen the PROCESS_HEAP_ENTRY_MOVEABLE bit set in any of the heap entries encountered while walking a heap?
I have allocated some memory using GlobalAlloc(GMEM_MOVEABLE, nBlockSize);
where nBlockSize = 65 * 1024.
When I call HeapWalk and iteratively obtain the PROCESS_HEAP_ENTRY data, I never see the PROCESS_HEAP_ENTRY_MOVEABLE bit set in any of the heap entries.
I used GetProcessHeaps and separately walked each of the 3 heaps my test program has in it.
The entire reason this is an issue is that a process is only allowed 65535 GMEM_MOVEABLE allocations at one time (according to a couple Microsoft documents), and our product is reaching this limit. I want to periodically check, for QA purposes, how many handles have already been used.
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how can I create or develop a theme like the popular themes "crystal xp" or like something else by using Visual C++ / MFC ?
WAITING eagerly for anykind of answers.Thanks in advance.
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Does this help?
"A good athlete is the result of a good and worthy opponent." - David Crow
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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Would you please stop searching the internet, there is nothing of value there 
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If you want to do it programmatically, if you have heard of the application WindowBlinds (which skins windows), I believe that it works by injecting a DLL/multiple DLLs into every running application (including explorer.exe to skin the taskbar and start menu), which then takes over the window's window procedure, and custom draws all of the controls.. I'm not sure how much time you want to spend over your appication or how complicated you want it to be.. but I think this is probably the right way to go if you wish to do it programatically..
Hope this helps!
--PerspX
"Nowadays, security guys break the Mac every single day. Every single day, they come out with a total exploit, your machine can be taken over totally. I dare anybody to do that once a month on the Windows machine." - Bill Gates
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Does this[^] article helpful?
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