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How to solve a Memory leak in TCheckListBox Turn on/off line numbers in source code. Switch to Orginial background IDE or DSP color Comment or reply to this aritlce/tip for discussion. Bookmark this article to my favorite article(s). Print this article
24-Aug-02
Category
VCL-General
Language
Delphi 3.x
Views
85
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Publisher:
DSP, Administrator
Reference URL:
DKB
			Author: Tomas Rutkauskas

I just found a memory leak in TCheckListBox (while using Delphi 3). Every time you 
check an item at runtime, a wrapper is created in routine TCheckListBox.GetWrapper 
in CheckLst.pas.

Answer:

These wrappers were supposed to be freed in procedure TCheckListBox.DestroyWnd; but 
this procedure is never called. Therefore all these pointers will never be freed.

The work around to this is to manually clear the listbox when the form is destroyed:

1   procedure TForm1.FormDestroy(Sender: TObject);
2   begin
3     CheckListBox1.Items.Clear;
4     inherited;
5   end;


			
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