Altitude Property
The altitude the class's system driver should use.
Syntax
ANSI (Cross Platform) int GetAltitude();
int SetAltitude(int iAltitude); Unicode (Windows) INT GetAltitude();
INT SetAltitude(INT iAltitude);
#define PID_CBREGISTRY_ALTITUDE 2 CBFSFILTER_EXTERNAL void* CBFSFILTER_CALL CBFSFilter_CBRegistry_Get(void *lpObj, int propid, int arridx, int *lpcbVal, int64 *lpllVal); CBFSFILTER_EXTERNAL int CBFSFILTER_CALL CBFSFilter_CBRegistry_Set(void *lpObj, int propid, int arridx, const void *val, int cbVal);
Default Value
0
Remarks
This property specifies the altitude that the class's system driver should use. A driver's altitude determines its absolute position in the stack of filter drivers; drivers with higher altitudes are attached towards the top of the stack, closer to user mode, which allows them to process requests earlier.
Registry filter drivers are not required to specify an altitude; and this property's default value of 0 is interpreted as "no altitude". However, registry filter drivers that don't specify an altitude will always be attached near the top of the filter driver stack, which may not be desirable. Please refer to the Driver Altitudes topic for more information.
Data Type
Integer