Handle is an abstraction of a resource or a reference to an entity. It can have different implementations: a pointer, an index in a table etc.
Questions tagged [handle]
1261 questions
162
votes
7 answers
What is a Windows Handle?
What is a "Handle" when discussing resources in Windows? How do they work?
Al C
- 4,551
- 5
- 35
- 63
120
votes
4 answers
Finding the handle to a WPF window
Windows forms had a property win1.Handle which, if I recall, returns the handle of the main window handle?
Is there an equivalent way to get the handle of a WPF Window?
I found the following code online,
IntPtr windowHandle = new…
Evan
- 4,250
- 10
- 37
- 58
101
votes
8 answers
What is a handle in C++?
I have been told that a handle is sort of a pointer, but not, and that it allows you to keep a reference to an object, rather than the object itself. What is a more elaborate explanation?
Xenoprimate
- 6,942
- 15
- 51
- 89
32
votes
1 answer
Jquery UI sortable, button is not working as handle
I am trying to sort tr's in a table.
code
$("table tbody").sortable({
handle: 'button'
//handle: 'img'
}).disableSelection();
live fiddle
now the problem is when using img as handle its working fine
but when using button as handle its not…
Uttara
- 2,406
- 2
- 21
- 35
28
votes
3 answers
What is the range of a Windows HANDLE on a 64 bits application?
On WinAPI, the HANDLE type is defined as a void*, thus on a 64 bit application the HANDLE value may range from 0 to 18446744073709551615.
But is that true in practice? Does any documentation specify the integral range of such a HANDLE?
If for…
Denilson Amorim
- 8,082
- 5
- 22
- 31
28
votes
8 answers
Under which circumstances does the System process (PID 4) retain an open file handle?
My application running on a Windows server makes use of a Jet/Access database. For some reasons around every two weeks that database file gets locked by the System process (PID 4, seems to be fixed)
After some googling I found some other users…
Daniel Rikowski
- 66,219
- 52
- 237
- 318
24
votes
2 answers
How to handle a webview confirm dialog?
I'm displaying a webpage in a WebView and on the webpage, there is a button. When you click the button, a confirmation dialog is supposed to popup, but it doesn't show in my WebView. It does popup if I go to the same webpage in the android…
brockoli
- 4,376
- 6
- 34
- 45
24
votes
6 answers
How do I retrieve a specific product in Shopify Liquid?
I have a list of product handles, and I want to fetch the product based on this handle. It seems there is no way to tell Liquid to go and get a single product. I could do this with the API, but if I use the API then I have to use JavaScript, and I…
jayshields
- 375
- 1
- 2
- 8
24
votes
4 answers
What is the difference between: Handle, Pointer and Reference
How does a handle differ from a pointer to an object and also why can't we have a reference to a reference?
quantum231
- 1,927
- 3
- 24
- 45
23
votes
7 answers
How to find that Mutex in C# is acquired?
How can I find from mutex handle in C# that a mutex is acquired?
When mutex.WaitOne(timeout) timeouts, it returns false. However, how can I find that from the mutex handle? (Maybe using p/invoke.)
UPDATE:
public class InterProcessLock :…
TN.
- 17,602
- 25
- 84
- 141
23
votes
1 answer
How can I tell if a given hWnd is still valid?
I'm using a third-party class that spawns an instance of Internet Explorer. This class has a property, hWnd, that returns the hWnd of the process.
Later on down the line, I may want to reuse the instance of the application if it still exists, so I…
Ian P
- 12,298
- 6
- 42
- 68
23
votes
16 answers
pointer vs handles in C (are the terms used to convey separate things?)
Recently, I read a white paper by an individual who refers to a pointer to a struct as a handle. The author was clearly someone who had written C code on the windows platform previously. Googling indicates that windows programmers interact with…
Setjmp
- 23,834
- 23
- 67
- 90
23
votes
3 answers
how to properly reuse a curl handle
I want to properly reuse a curl handle, so that it won't give me errors and function normally.
Suppose I have this piece of code:
CURL *curl;
curl_global_init(CURL_GLOBAL_ALL);
curl = curl_easy_init();
curl_easy_setopt(curl,…
user1494517
- 281
- 1
- 2
- 10
21
votes
3 answers
What is a "handle"?
Possible Duplicates:
What is a Windows Handle?
What exactly is “handle” ?
I see references to window handles, controls which have a reference to a window handle, etc. But I don't know what a handle is.
I especially would like to know what it is,…
richard
- 10,572
- 20
- 83
- 144
21
votes
4 answers
Register to be default app for custom file type
Register to be able to open files of custom type. Say i have .cool files, and if the user tries to open it, Android asks if they would like to open it with my application. How?
Aymon Fournier
- 4,063
- 12
- 37
- 57