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C4W_Peek()
Return an area of memory
------------------------------------------------------------------------------

Syntax
C4W_Peek( <nPtr>, [ <nCount> ] )   -->   cStr

Arguments
<nPtr> is a pointer to the start of the memory.

<nCount> optionally specifies the number of bytes.  The
default is zero, meaning to return bytes up to (but not
including) the first byte which is CHR( 0 ).

Returns
A string containing the bytes of memory.

Description
This function is intended for use with messages where the
<nlParam> value is a pointer to a data structure.  Use it with
care.

Example
// Taken from source\odraw.prg

#include "drawitem.ch"

static function DrawBtn1(hWnd, nMsg, nwParam, nlParam)
// nMsg == WM_DRAWITEM, so nlParam is LPDRAWITEMSTRUCT
// (i.e. a C pointer)
local     aDIS := bin2a( c4w_peek( nlParam, 26 ), DIS_STRUCT_DEF )
local     hDC  := aDIS[ DIS_hDC ]

// . . .