IOCTL_DISK_PERFORMANCE

The IOCTL_DISK_PERFORMANCE DeviceIoControl operation provides disk performance information.

dwIoControlCode = IOCTL_DISK_PERFORMANCE; // operation code

lpInBuffer = NULL; // address of input buffer; not used; must be NULL

nInBufferSize = 0; // size of input buffer; not used; must be zero

lpOutBuffer; // address of output buffer

nOutBufferSize; // size of output buffer

lpBytesReturned; // address of actual bytes of output

Parameters

lpInBuffer

Points to an input buffer. Not used with this operation. Set to NULL.

nInBufferSize

Specifies the size, in bytes, of the buffer pointed to by lpInBuffer. Not used with this operation. Set to zero.

lpOutBuffer

Points to a buffer that will receive a DISK_PERFORMANCE data structure.

nOutBufferSize

Specifies the size, in bytes, of the buffer pointed to by lpOutBuffer, which must be large enough to contain a DISK_PERFORMANCE data structure.

lpBytesReturned

Points to a DWORD that receives the actual size, in bytes, of the data stored into lpOutBuffer.

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.

See Also

DeviceIoControl, DISK_PERFORMANCE

Software for developers

Delphi Components
.Net Components
Software for Android Developers

More information resources

MegaDetailed.Net
Unix Manual Pages
Delphi Examples

Databases for Amazon shops developers

Amazon Categories Database
Browse Nodes Database