>>695
うーん，私が作ってみたソースをさらすので比べてみてください．まずメインフォーム・実装部．

uses ExtCtrls, P02aMDI_ChildForm;

procedure InitImage(anImage: TImage);
begin
anImage.Canvas.Brush.Color := random($1000000);
anImage.Canvas.Pen.Color := random($1000000);
anImage.Canvas.Pen.Width := 2;
anImage.Canvas.Rectangle(anImage.ClientRect);
end;

procedure TP02aMainForm.Action_NewExecute(Sender: TObject);
begin
CreateChild;
end;

procedure TP02aMainForm.CreateChild;
var
Child: TP02aChildForm;
begin
Child := TP02aChildForm.Create(Application);
InitImage(Child.Image1);
end;