GetVxDServiceOrdinal

include vmm.inc

GetVxDServiceOrdinal reg, ServiceName

#include <vmm.h>

DWORD dwServiceOrdinal = GetVxDServiceOrdinal(ServiceName);

Obtains the virtual device service ordinal, for use by Hook_Device_Service.

• The assembly language macro returns the ordinal for the named service in the specified register. The C language macro returns the ordinal as its return value.

reg

Register to receive the virtual device service ordinal.

ServiceName

Name of service for which to obtain the ordinal.

This macro must be used whenever you need to obtain a virtual device service ordinal. The method employed by Windows 3.1 no longer works.

Example:

    GetVxDServiceOrdinal eax, DOSMGR_Begin_V86_App
    mov      esi, offset32 BeginPmAppHook
    VMMCall  Hook_Device_Service

See also VxD_REAL_INIT_SEG