Delphi onshow main form / modal form

Question

I have a project which has a main form and some other forms. When the app loads it needs to carry out some tasks and show the results in a modal form on top of the main form. T

Answer 1

One commonly used option is to post yourself a message in the form's OnShow. Like this:

const
  WM_SHOWMYOTHERFORM = WM_USER + 0;

type
  TMyMainForm = class(TForm)
    procedure FormShow(Sender: TObject);
  protected
    procedure WMShowMyOtherForm(var Message: TMessage); message WM_SHOWMYOTHERFORM;
  end;

...


procedure TMyMainForm.FormShow(Sender: TObject);
begin
  PostMessage(Handle, WM_SHOWMYOTHERFORM, 0, 0);
end;

procedure TMyMainForm.WMShowMyOtherForm(var Message: TMessage);
begin
  inherited;
  with TMyOtherForm.Create(nil) do begin
    try
      ShowModal;
    finally
      Free;
    end;
  end;
end;