W32_DEVICEIOCONTROL
Passes a
control code and related information to a virtual device driver.
include VMM.INC
mov ebx, VMHandle
mov eax, W32_DEVICEIOCONTROL
mov esi, OFFSET32 dioparams
VMMCall System_Control
Parameters
VMHandle
Handle of the
virtual machine.
dioparams
Address of a DIOCParams structure containing a
control code and information that the VxD needs to process the control code.
Return Value
Returns one
of the following values in the EAX register:
|
0 |
The control
code processed successfully. |
|
- 1 |
An
asynchronous operation is in progress. A VxD must return this value only if
the lpoOverlapped member of the DIOCParams structure is not NULL. |
|
Error code |
An error
occurred. |
Remarks
This message
is sent to a VxD when an application specifies the name of a VxD in the CreateFile function and when an
application specifies the device handle of the VxD in a call to the DeviceIoControl or CloseHandle function. This message uses
the ESI register.