get showmessage handle

Experts:
    I like to use "showmessage" box to hold my program. I try to  get the "showmessage" box 's handle.How to?Thanks.
   
Cheng_samAsked:
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JaccoCommented:
But when the Box is showing how will you execute code? Are you using an extra thread?

The MessageBox shown when ShowMessage is executed, is a normal Delphi form which is in the Screen.Forms list when the box is showing.

The class of the form is TMessageForm so to find it use

function GetMessageBoxHandle: THandle;
var
  liForm: Integer;
begin
  Result := 0;
  for liForm := 0 to Screen.FormCount-1 do
    if SameText(Screen.Forms[liForm].ClassName, 'TMessageForm') then
    begin
      Result := Screen.Forms[liForm].Handle;
      Exit;
    end;
end;

This will only work fro within the same application in a separate thread though.

Regards Jacco

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Cheng_samAuthor Commented:
thanks Jacco .it works.I use a timer to get the handle.
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Delphi

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