- 1 year ago
What is the GENERIC_WRITE constant hex value in windows?
In Windows, the GENERIC_WRITE
constant is used when opening a file or device handle with write access. Its hexadecimal value is 0x40000000
.
This constant is commonly used in conjunction with other constants like GENERIC_READ
(hex value 0x80000000
) to specify the desired access when calling the CreateFile
function or similar file/device handling functions in the Windows API.
For example, to open a file with both read and write access, you would use the combination of GENERIC_READ
and GENERIC_WRITE
:
cDWORD dwDesiredAccess = GENERIC_READ | GENERIC_WRITE;
HANDLE hFile = CreateFile(L"C:\\example.txt", dwDesiredAccess, ...);
The CreateFile
function allows you to specify various parameters for file handling, including access rights, file sharing options, and file attributes. The GENERIC_WRITE
constant indicates that you want to open the file with write access, allowing you to write data to the file.
Keep in mind that proper access rights and permissions should be considered when working with file handling functions in Windows to avoid security issues and ensure the correct behavior of your application.