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#define INCL_DOSDEVIOCTL
 
USHORT DosDevIOCtl(0L, pbNotify, 0x0052, 0x0007, hDevice)
PBYTE pbNotify;    /* pointer to structure with screen group */
HFILE hDevice;     /* device handle                          */
 
The MOU_SCREENSWITCH function notifies the mouse device driver that the
screen group is about to be switched, and then sets a system pointer-draw
enable/disable flag. Any pointer drawing is locked until the flag is cleared
by using the MOU_ALLOWPTRDRAW function (0x0007, 0x0050).
 
Parameter  Description
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pbNotify   Points to the SCREENGROUP structure that contains the
           notification type and screen-group identifier.
 
hDevice    Identifies the pointing device that receives the device-control
           function. The handle must have been created previously by using
           the DosOpen function.
 
Return Value
 
The return value is zero if the function is successful or an error value if
an error occurs.
 
See Also
 
DosOpen, SCREENGROUP
 
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