Author: Tomas Rutkauskas

I am working on a program that uses a TListView with the checkboxes property set to 
true. There are several things I would like to be triggered off of the boxes being 
checked or unchecked. Is there any OnCheck event or something similar that I can 
use to start a process off of the check of one of these boxes?

Answer:

It seems, there isn't such event. But you could use this workaround:
1   
2   procedure TForm1.ListView1MouseDown(Sender: TObject; Button: TMouseButton;
3     Shift: TShiftState; X, Y: Integer);
4   var
5     li: TListItem;
6     ht: THitTests;
7   begin
8     if ListView1.Items.Count <= 0 then
9       exit;
10    li := ListView1.GetItemAt(x, y);
11    if Li <> nil then
12    begin
13      if li.Selected = false then
14        li.Selected := true;
15    end
16    else
17      exit;
18    ht := LVSoLine.GetHitTestInfoAt(x, y);
19    if ht = [htOnStateIcon] then
20    begin
21      { Write your code here for checkbox OnCheck event. Remember this will
22      fire after the checkbox state is changed }
23    end;
24  end;