The IOCTL_DISK_SET_PARTITION_INFO DeviceIoControl operation sets the partition type of the specified disk partition.
dwIoControlCode = IOCTL_DISK_SET_PARTITION_INFO; // operation code
lpInBuffer; // address of input buffer
nInBufferSize; // size of input buffer
lpOutBuffer = NULL; // address of output buffer; not used; must be NULL
nOutBufferSize = 0; // size of output buffer; not used; must be zero
lpBytesReturned; // address of actual bytes of output
Parameters
lpInBuffer
Points to a buffer that contains the partition data to be set. The data exists as a SET_PARTITION_INFORMATION data structure.
nInBufferSize
Specifies the size, in bytes, of the buffer pointed to by lpInBuffer, which must be large enough to contain a SET_PARTITION_INFORMATION data structure.
lpOutBuffer
Points to an output buffer. Not used with this operation. Set to NULL.
nOutBufferSize
Specifies the size, in bytes, of the buffer pointed to by lpOutBuffer. Not used with this operation. Set to zero.
lpBytesReturned
Points to a DWORD that receives the actual size, in bytes, of the data stored into lpOutBuffer. Not used with this operation. Set to NULL.
Return Values
If the operation succeeds, DeviceIoControl returns TRUE.
If the operation fails, DeviceIoControl returns FALSE. To get extended error information, call GetLastError.
Remarks
This device I/O control operation is for disk devices. Floppy disk drivers, however, need not handle this operation.
See Also
DeviceIoControl, IOCTL_DISK_GET_PARTITION_INFO, SET_PARTITION_INFORMATION