创建modeless对话框

void CTestDlgDlg::OnCreateWindow()
{
 // TODO: Add your control notification handler code here
 CMyDialog *pDialog = NULL;

 pDialog = new CMyDialog();

 pDialog->Create(IDD_DIALOG, this);

 if ( NULL != pDialog )
 {
  pDialog->ShowWindow(SW_SHOW);
 }
}