Mega Code Archive
How can i avoid an access violation when using the move procedure
<![CDATA[
Question:
How can I avoid an access violation when using the move procedure
with pointers?
Answer:
You must dereference the pointers, otherwise you are moving the
address of the pointers and possibly corrupting other memory
locations.
Example
procedure TForm1.Button1Click(Sender: TObject);
var
p1 : pointer;
p2 : pointer;
begin
GetMem(p1, 128);
GetMem(p2, 128);
{This line may cause an access violation}
Move(p1, p2, 128);
{This line is correct}
Move(p1^, p2^, 128);
FreeMem(p1, 128);
FreeMem(p2, 128);
end;
]]>