FSH_CALLDRIVER - Call Device Driver's Extended Strategy entry point

This routine allows FSDs to call a device driver's Extended Strategy entry 
Calling Sequence   

int far pascal FSH_CALLDRIVER(pPkt, hVPB, fControl)

void far * pPkt;
unsigned short hVPB;
unsigned short fControl;

pPkt is a pointer to device driver Extended strategy request packet. 
hVPB is the volume handle for the source of I/O. 
fControl is the bit mask of pop-up control actions: 
Bit 0 off indicates volume change pop-up desired 
Bit 0 on indicates no volume change pop-up 
All other bits are reserved and must be zero. 
If no error is detected, a zero error code is returned. If an error is 
detected, one of the following error codes is returned: 
is an indication that removable media volume change has occurred. 
the fControl flag word has reserved bits on. 
This routine should be called for any Extended strategy requests going to 
a drive that has removable media. 
For a detailed description of the Extended Strategy request interface 
please see the OS/2 Version 2.0 Physical Device Driver Reference   
FSH_CALLDRIVER may block. 
Note:   OS/2 does not validate input parameters. Therefore, an FSD should 
call FSH_PROBEBUF where appropriate. 

Created using Inf-PHP v.2 (c) 2003 Yuri Prokushev
Created using Inf-HTML v.0.9b (c) 1995 Peter Childs