#ifndef _NTWMI_H

/**
 * The WmiQueryAllDataA function returns all WMI data blocks that implement a given WMI class (ANSI).
 *
 * \param DataBlockHandle Handle to a WMI data block object.
 * \param BufferLength Pointer to a memory location that specifies the size of the buffer.
 * \param Buffer Pointer to the buffer where the routine returns the WMI data.
 * \return ULONG Successful or errant status.
 */
NTSYSAPI
ULONG
NTAPI
WmiQueryAllDataA(
    _In_ HANDLE DataBlockHandle,
    _Inout_ PULONG BufferLength,
    _Out_writes_bytes_opt_(*BufferLength) PVOID Buffer
    );

#endif
View code on GitHub