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Overview |
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Group |
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Quick Info
Windows NT
| Yes
| Win95
| Yes
| Win32s
| No
| Import Library
| kernel32.lib
| Header File
| wincon.h
| Unicode
| No
| Platform Notes
| None
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CreateConsoleScreenBuffer
The CreateConsoleScreenBuffer function creates a console screen buffer and returns a handle of it.
HANDLE CreateConsoleScreenBuffer(
DWORD dwDesiredAccess,
| // access flag
| DWORD dwShareMode,
| // buffer share mode
| LPSECURITY_ATTRIBUTES *lpSecurityAttributes,
| // pointer to security attributes
| DWORD dwFlags,
| // type of buffer to create
| LPVOID lpScreenBufferData
| // reserved
| );
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Parameters
dwDesiredAccess
Specifies the desired access to the console screen buffer. This parameter can
be one or both of the following values:
Value
| Meaning
| GENERIC_READ
| Requests read access to the console screen buffer, enabling the process to
read data from the buffer.
| GENERIC_WRITE
| Requests write access to the console screen buffer, enabling the process to
write data to the buffer.
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dwShareMode
Specifies how this console screen buffer can be shared. This parameter can be
zero, indicating that the buffer cannot be shared, or it can be one or both of
the following two values:
Value
| Meaning
| FILE_SHARE_READ
| Other open operations can be performed on the console screen buffer for read
access.
| FILE_SHARE_WRITE
| Other open operations can be performed on the console screen buffer for write
access.
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lpSecurityAttributes
Pointer to a SECURITY_ATTRIBUTES structure that determines whether the returned handle can be inherited by
child processes. If lpSecurityAttributes is NULL, the handle cannot be inherited.
Windows NT: The lpSecurityDescriptor member of the structure specifies a security descriptor for the new console
screen buffer. If lpSecurityAttributes is NULL, the console screen buffer gets a default security descriptor.
Windows 95: The lpSecurityDescriptor member of the structure is ignored.
dwFlags
Specifies the type of console screen buffer to create. The only currently
supported screen buffer type is CONSOLE_TEXTMODE_BUFFER.
lpScreenBufferData
Reserved for possible future use; should be NULL.
Return Values
If the function succeeds, the return value is a handle to the new console
screen buffer.
If the function fails, the return value is INVALID_HANDLE_VALUE. To get
extended error information, call GetLastError.
Remarks
A console can have multiple screen buffers but only one active screen buffer.
Inactive screen buffers can be accessed for reading and writing, but only the
active screen buffer is displayed. To make the new screen buffer the active
screen buffer, use the SetConsoleActiveScreenBuffer function.
The calling process can use the returned handle in any function that requires
a handle of a console screen buffer, subject to the limitations of access
specified by the dwDesiredAccess parameter.
The calling process can use the DuplicateHandle function to create a duplicate screen buffer handle that has different access
or inheritability from the original handle. However, DuplicateHandle cannot be used to create a duplicate that is valid for a different process
(except through inheritance).
To close the screen buffer handle, use the CloseHandle function.
See Also
CloseHandle, DuplicateHandle, GetConsoleScreenBufferInfo, SECURITY_ATTRIBUTES, SetConsoleActiveScreenBuffer, SetConsoleScreenBufferSize
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