On Oct 19 1995 (09:40), David Hare-Scott of 3:712/505 wrote:

DH> Here is one method from the MS KB article. >

DH> Method 1: Exported Selectors (Preferred)
DH> ----------------------------------------

DH> The Windows 3.0 and 3.1 Kernels export several selectors 
DH> that should
DH> be used by applications that require access to physical 
DH> memory located
DH> below the 1 megabyte (MB) boundary. The exported selectors 
DH> are:

DH>    __0000h, __0040h, __A000h, __B000h, __B800h, __C000h, 
DH> __D000h,
DH>    __E000h, and __F000h

DH> To use one of these selectors, place it onto a segment 
DH> register and
DH> access the memory or create a long pointer. Here are 
DH> examples using
DH> the Microsoft Macro Assembler (MASM) and Microsoft C:

DH>    In ASM:       externA  __0040h
DH>                  ...
DH>                  mov ax, __0040h
DH>                  mov es, ax


DH>    In C:         extern   WORD _0040h;
DH>                  LPSTR    lpBIOSDataArea;
DH>                  ...
DH>                  /* Note the & and single underscore */
DH>                  lpBIOSDataArea = (LPSTR)MAKELONG(0, 
DH> &_0040h);

DH> >
DH> My compiler knows nothing about the symbols __0040, _0040, 
DH> _0040h etc
DH> The second method is much longer and more complex.

You are including windows.h aren't you?

Regards, Andrew.

@EOT:

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