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Overview |
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Group |
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Quick Info
Windows NT
| Yes
| Win95
| No
| Win32s
| No
| Import Library
| user-defined
| Header File
| -
| Unicode
| No
| Platform Notes
| None
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CopyProgressRoutine
[New - Windows NT]
The CopyProgressRoutine function is called when a portion of a copy operation started by CopyFileEx is completed. This function is an application-defined callback routine.
DWORD WINAPI CopyProgressRoutine(
LARGE_INTEGER TotalFileSize,
| // total file size, in bytes
| LARGE_INTEGER TotalBytesTransferred,
| // total number of bytes transferred
| LARGE_INTEGER StreamSize,
| // total number of bytes for this stream
| LARGE_INTEGER StreamBytesTransferred,
| // total number of bytes transferred for this stream
| DWORD dwStreamNumber,
| // the current stream
| DWORD dwCallbackReason,
| // reason for callback
| HANDLE hSourceFile,
| // handle to the source file
| HANDLE hDestinationFile,
| // handle to the destination file
| LPVOID lpData
| // passed by CopyFileEx
| );
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Parameters
TotalFileSize
The total size of the file, in bytes.
TotalBytesTransferred
The total number of bytes transferred from the source file to the destination
file since the copy operation began.
StreamSize
The total size of the current file stream, in bytes.
StreamBytesTransferred
The total number of bytes in the current stream that have been transferred
from the source file to the destination file since the copy operation began.
dwStreamNumber
Identifies the current stream. The stream number is 1 the first time CopyProgressRoutine is called.
dwCallbackReason
Specifies the reason that CopyProgressRoutine was called. This parameter can be one of the following values:
Value
| Meaning
| CALLBACK_CHUNK_FINISHED
| Another part of the data file was copied.
| CALLBACK_STREAM_SWITCH
| Another stream was created and is about to be copied. This is the callback
reason given when the callback routine is first invoked.
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hSourceFile
Identifies the source file.
hDestinationFile
Identifies the destination file
lpData
The argument passed to CopyProgressRoutine by the CopyFileEx function.
Return values
The CopyProgressRoutine function should return one of the following values:
Value
| Meaning
| PROGRESS_CONTINUE
| Continue the copy operation.
| PROGRESS_CANCEL
| Cancel the copy operation and delete the destination file.
| PROGRESS_STOP
| Stop the copy operation. It can be restarted at a later time.
| PROGRESS_QUIET
| Continue the copy operation, but stop invoking CopyProgressRoutine to report progress.
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Remarks
An application can use this information to display a progress bar that shows
the total number of bytes copied as a percent of the total file size.
See Also
CopyFileEx
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