From: Mathias Ellinger [me@Ellisoft.de]
Sent: Monday, August 20, 2001 5:44 AM
To: NT Developers Interest List
Subject: [ntdev] Re: Using 98 VCOMM services in a .sys driver..

hello,

forget my message ... You will use VXD service from a
Kernel driver. Here a example

#define ID_Open_Boot_Log       0x00010188
#define ID_Write_Boot_Log      0x00010189
#define ID_Close_Boot_Log      0x0001018A

#define vxdCall(service) \
    _asm _emit 0xcd \
    _asm _emit 0x20 \
    _asm _emit ((service) & 0xff) \
    _asm _emit ((service) >> 8) & 0xff \
    _asm _emit ((service) >> 16) & 0xff \
    _asm _emit ((service) >> 24) & 0xff \


BOOLEAN inline
Open_Boot_Log()
 {
    vxdCall(ID_Open_Boot_Log)
    __asm xor eax,eax            // 0 means enabled
    __asm jnz notinst;
    return TRUE;
  notinst:
    return FALSE;
 }

void inline
Close_Boot_Log()
 {
   vxdCall(ID_Close_Boot_Log)
 }

void inline
Write_Boot_Log(DWORD len, LPSTR what)
 {
    __asm mov edx,what
    __asm mov ecx,len
    vxdCall(ID_Write_Boot_Log)
 }


elli



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