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 DosGetProtVec()
------------------------------------------------------------------------------
 Purpose:
 Get a protected mode pointer to a protected mode interrupt handler.

 Syntax:
 USHORT BLXAPI DosGetProtVec(USHORT intno, PINTHAN __far *handler)

 Parameters:
 intno    Interrupt number.
 handler  Pointer to a function pointer to receive the address of the
          interrupt handler.

 Returns:
 Address of the interrupt handler.

 Description:
 DosGetProtVec() returns the protected mode address of the protected mode
 interrupt handler for the specified interrupt number.

 Example:
 #include <stdio.h>                                                          
 #include <blx286.h>                                                         
                                                                             
 void main(void)                                                             
 {                                                                           
 INTHAN      handler;                                                        
                                                                             
 if (DosGetProtVec(0x21, &handler) == 0)                                     
    {                                                                        
    printf("Protected mode Int 21 handler : %Fp\n", handler);                
    }                                                                        
 }