DRV_ENABLE
Enables the
driver. The driver should initialize any variables and locate devices with the
input and output (I/O) interface.
Parameters
hdrvr
Handle of the
installable driver instance.
Return Value
No return
value.
Remarks
The dwDriverId,
lParam1, and lParam2 parameters are not used.
Drivers are
considered enabled from the time they receive this message until they are
disabled by using the DRV_DISABLE message.