Ioctl

The Ioctl function performs a variety of different operations. Much of its functionality mirrors the functionality of other functions in wdbgexts.h.

ULONG 
  Ioctl (
    USHORT IoctlType,
    PVOID lpvData,
    ULONG cbSizeOfContext
    );

Parameters

IoctlType

Specifies which Ioctl operation to perform. For a list of possible IoctlType values, see the Comments section.

lpvData

Points to the address of a data structure. The type of structure that is required depends on the value of IoctlType.

cbSizeOfContext

Specifies the size of the structure that lpvData points to.

Return Value

The meaning of return value depends on IoctlType. See the page for the corresponding Ioctl operation for the meaning of the return value.

Comments

The Ioctl function is the entry point for many of the functionalities supplied for WdbgExts extensions. Many of the other functions in wdbgexts.h are simply wrappers for calls to Ioctl.

The following table lists the possible IoctlType values. If the IoctlType corresponds to another function, that function is provided; otherwise, a link to the page describing the Ioctl operation is provided.

Requirements

Headers: Defined in wdbgexts.h. If you are writing a WdbgExts extension, include wdbgexts.h. If you are writing a DbgEng extension that calls this function, include wdbgexts.h before dbgeng.h (see Writing DbgEng Extension Code for details).