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#define INCL_DOSDEVIOCTL
 
USHORT DosDevIOCtl(pbBuffer, pbCommand, 0x005D, 0x0008, hDevice)
PBYTE pbBuffer;     /* pointer to buffer with data       */
PBYTE pbCommand;    /* pointer to structure with command */
HFILE hDevice;      /* device handle                     */
 
The DSK_SYNC function synchronizes disk I/O operations.
 
Parameter  Description
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pbBuffer   Not used; must be zero.
 
pbCommand  Points to the synchronization operation.
 
hDevice    Identifies the disk drive that receives the device-control
           function. The handle must have been created previously by using
           the DosOpen function.
 
Return Value
 
The return value is zero if the function is successful or an error value if
an error occurs.
 
Comments
 
Some I/O operations cannot be overlapped with disk operations. This IOCtl
function allows the disk device driver to be instructed to complete
in-process operations, and then queue all further requests for disk I/O. A
second call must be made, with pbCommand set to 0x0000, to instruct the disk
device driver to release queued disk I/O and resume normal processing.
 
See Also
 
DosOpen
 
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