> I am using a variant of bitmap which does not have the .empty property.
> On formclose I want to free this item, but there is no valid way to check
> its empty property eg
> TFastBMP.size/ tbmp.bmHeader.biSize and so on. So Freeing can be an
invalid
> operation.
When you say:
Handle.Free
What is actually happening is
if Handle<>nil then Handle.Destroy;
this calls the 'Destructor' of the type of the object (in your case TBitmap
or similar)
The Destructor should be handling release of resources held within the
object so:
tbmp.free
would be correct since the contents you are referring to are 'owned' by the
object
whose Destructor will be called.
> So is this valid, or is it leaving an area of memory still being utilised?
> tbmp:=nil; tbmp.Free;
This is definitely not correct once you know that this is actually doing
tbmp := nil;
if tbmp<>nil then tbmp.Destroy;
Hence the Destructor never gets called. This should be all that's necessary
tbmp.Free;
--
Aaron@home
---------------------------------------------------------------------------
New Zealand Delphi Users group - Delphi List - [EMAIL PROTECTED]
Website: http://www.delphi.org.nz
