compress.c File Reference

#include "precomp.h"

Include dependency graph for compress.c:

Go to the source code of this file.

Functions
BOOLEAN NTAPI	EnableVolumeCompression (IN PWCHAR DriveRoot, IN USHORT Compression)

Function Documentation

EnableVolumeCompression()

BOOLEAN NTAPI EnableVolumeCompression	(	IN PWCHAR	DriveRoot,
		IN USHORT	Compression
	)

Definition at line 17 of file compress.c.

{
    HANDLE hFile;
    DWORD RetBytes;
    BOOL Ret;

    hFile = CreateFileW(DriveRoot,
                        FILE_READ_DATA | FILE_WRITE_DATA,
                        FILE_SHARE_READ | FILE_SHARE_WRITE,
                        NULL,
                        OPEN_EXISTING,
                        FILE_FLAG_BACKUP_SEMANTICS,
                        NULL);
    if (hFile == INVALID_HANDLE_VALUE)
        return FALSE;

    Ret = DeviceIoControl(hFile,
                          FSCTL_SET_COMPRESSION,
                          &Compression,
                          sizeof(USHORT),
                          NULL,
                          0,
                          &RetBytes,
                          NULL);

    CloseHandle(hFile);

    return (Ret != 0);
}

Referenced by wmain().