A device driver is a software that accesses a device (some kind of real or virtual hardware). What you are looking for is called API hooking or API monitoring (just search the web for these terms combined with C++ and Windows).
I tried to explore WinAPIOverride.
Will this application display Kernel System calls? I doubt. It is showing some addresses in the call stack, but not the actual system calls name. Is is possible to get the names of the kernel system calls?
for example,If CObject has a "Hello" property,I can set it's value like this:
CObject* pObject = new CObject("switch");
but It is not very good enough,if I code like this:
here,I write the wrong property name ,but the code wouldn't generate any error at compile time.
1 there is a lot class defined by string
2 there may be a lot of objects defined by any class
3 there is a lot of properties for each object
My question is how could I avoid the above mistake at compile time?
Thank you all
I could check whether a property is in the set or not at run time.
but I want to check it at compile time.
I just write "Helloooooooo" instead of "Hello" by mistake.
I want to find out this mistake when I compile it.
The only way to provoke a compiler error would be to pass the knowledge of the full list of class properties to the compiler, at compile time. That would defeat the purpose of a generic class definition, and you could just as well define simple member variables instead.
This raises the question: where do your requirements come from, i. e the two requirements to define a generic class, and to force compile time errors when accessing an incorrectly labeled property? One of them has to go.
GOTOs are a bit like wire coat hangers: they tend to breed in the darkness, such that where there once were few, eventually there are many, and the program's architecture collapses beneath them. (Fran Poretto)
There is a certain window, about which we know hDC & hWnd.
By the window is used function SwapBuffer(hDC). I understand that the double buffer, and that buffer contains a certain image that is drawn in the window.
Is it possible in any way to copy the contents of the buffer to a compatible Bitmap or Image for Saving it into graphic file format?
You will need to allocate memory to hold the bits. That size is slightly tricky it depends on what color depth you are going to ask for in bits. Typically you want RGB24 or RGB32 and the size also needs to be aligned to a 4 byte boundary. Anyhow long story short its a funny maths calc and we need to setup a bitmap header info for the call ... Lets do 24 bit colour.
!handle displays information about a handle or handles that one or all processes in the target system own.
0:000> !handle c0dedbad f
Object Specific Information
Mutex is Owned
Mutant Owner 11bc.1418
Here are some other ideas in case you don't know how to use WinDbg:
You do realize you don't pass the handle around between threads right?
Two or more processes can call CreateMutex to create the same named mutex. The first process actually creates the mutex, and subsequent processes open a handle to the existing mutex. This enables multiple processes to get handles of the same mutex, while relieving the user of the responsibility of ensuring that the creating process is started first. When usingthis technique, you should set the bInitialOwner flag to FALSE; otherwise, it can be difficult to be certain which process has initial ownership.
If you go the other way and guarantee the inital thread opens it first you need to set the bInitialOwner flag and do a release. So your other choice.
The creating thread can use the bInitialOwner flag to request immediate ownership of the mutex. Otherwise, a thread must use one of the wait functions to request ownership. When the mutex's state is signaled, one waiting thread is granted ownership, the mutex's state changes to nonsignaled, and the wait function returns. Only one thread can own a mutex at any given time. The owning thread uses the ReleaseMutex function to release its ownership.
You seem to get getting confused between the two modes from what I am reading. You need to make a choice (a) or (b).
So I think you are getting this error because you are using the named technique without a name.
If lpName matches the name of an existing event, semaphore, waitable timer, job, or file-mapping object, the function fails and the GetLastError function returns ERROR_INVALID_HANDLE. This occurs because these objects share the same namespace.
In vino veritas
modified 10-Nov-16 14:53pm.
Last Visit: 31-Dec-99 19:00 Last Update: 28-Nov-23 20:03