Only one flag is currently defined. AFB_SWITCH
is set if the ulBankNumber field contains the value of a bank switch,
which is to be active when the call returns. AFB_SWITCH should not be set
for apertures that are not bank-switched.
ulBankNumber
This is an integer value specifying the initial
video memory bank index; 0 (zero) for the first bank, 1 (one) for the second
bank, and so on.
rctlRegion
This
field gives the rectangle, in device coordinates, that will be used for
"BLTing".
The device driver will perform "Exclude" processing to hide the mouse cursor
if it is in this area. If it is hidden when DEVESC_DEACQUIREFB is called,
it will be restored.