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We will find all windows, but if window is invisible or it hasn't a caption or it is a MDI-Child then, we won't show this window.
procedure TForm1.Button1Click(Sender: TObject);
var
Wnd: hWnd;
Buff: array [0..127] of Char;
begin
ListBox1.Clear;
Wnd:=GetWindow(Handle, gw_HWndFirst);
while Wnd<>0 do
begin
if (Wnd<>Application.Handle) and
IsWindowVisible(Wnd) and
(GetWindow(Wnd, gw_Owner)=0) and
(GetWindowText(Wnd, Buff, sizeof(buff))<>0) then
begin
GetWindowText(Wnd, Buff, SizeOf(Buff));
ListBox1.Items.Add(StrPas(Buff));
end;
Wnd:=GetWindow(Wnd, gw_hWndNext);
end;
ListBox1.ItemIndex:=0;
end;
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Win32 Programmer's Reference
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