процедура TfmForm.FormCreate (прислужник: TObject);
начните
ShowWindow (fmChildForm.Handle, SW_HIDE);
SetWindowLong (fmChildForm.Handle, GWL_EXSTYLE, getWindowLong (fmChildForm.Handle, GWL_EXSTYLE) или WS_EX_TOOLWINDOW);
ShowWindow (fmChildForm.Handle, SW_SHOW);
конец;