Ross Levis asks:
> The on-line help suggests the buffer parameter can be any variable type
> so why doesn't it work?
BlockWrite is defined as follows:
procedure BlockWrite(var f: File; var Buf; Count: Integer
[; var AmtTransferred: Integer]);
and the key things is the var Buf; parameter. In Delphi land this is a
parameter of any type, but what is actually passed is a pointer to the
lvalue parameter. So if you use something like a char, integer or double,
you will be passing a pointer to the location you are going to write from.
But because Delphi strings are dynamically allocated, passing a sreing must
be done carefully so as to pass a point to thew chacters you want to write,
and not a pointer to a pointer to the characters 8-)
So you must use Stringvar[1] as your parameter, which will actually pass
@Stringvar[1] to the routine and things will work. Just one of those areas
of Delphi that cause the brin some strain at times.
Cheers, Max.
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