学习：访问Edit Control的七种方法

/*
D:Visual_Studio_reposMFC1
*/
void CtestDlg::OnBnClickedButton1()
{
	wchar_t a1[12], a2[12], a3[12];	

	//方法一 GetWindowText
	//GetDlgItem(IDC_EDIT_1)->GetWindowText(a1,12);
	//GetDlgItem(IDC_EDIT_2)->GetWindowText(a2, 12);
	//_itow_s(_wtoi(a1) + _wtoi(a2),a3,10);
	//SetDlgItemText(IDC_EDIT_3, a3);

	//方法二 GetDlgItemText
	//GetDlgItemText(IDC_EDIT_1,a1,12);
	//GetDlgItemText(IDC_EDIT_2, a2,12);
	//_itow(_wtoi(a1) + _wtoi(a2), a3, 10);
	//SetDlgItemText(IDC_EDIT_3, a3);

	//方法三 GetDlgItemInt
	//int a = GetDlgItemInt(IDC_EDIT_1);
	//int b = GetDlgItemInt(IDC_EDIT_2);
	//SetDlgItemText(IDC_EDIT_3, _itow(a + b, a3, 10));

	//方法四 关联控件

	//方法五 关联变量

	//方法六 SendMessage
	//::SendMessage(GetDlgItem(IDC_EDIT_1)->m_hWnd, WM_GETTEXT, (WPARAM)12, (LPARAM)a1);
	//::SendMessage(GetDlgItem(IDC_EDIT_2)->m_hWnd, WM_GETTEXT, (WPARAM)12, (LPARAM)a2);
	//::SendMessage(GetDlgItem(IDC_EDIT_3)->m_hWnd, WM_SETTEXT, (WPARAM)12, (LPARAM)(_itow(_wtoi(a1) + _wtoi(a2), a3, 10)));

	//方法七 SendDlgItemMessage，利用失败
	//::SendDlgItemMessage(GetDlgItem(IDC_EDIT_1)->m_hWnd, IDC_EDIT_1, WM_GETTEXT, (WPARAM)12, (LPARAM)a1);
	//::SendDlgItemMessage(GetDlgItem(IDC_EDIT_2)->m_hWnd, IDC_EDIT_2, WM_GETTEXT, (WPARAM)12, (LPARAM)a1);
	//::SendDlgItemMessage(GetDlgItem(IDC_EDIT_3)->m_hWnd, IDC_EDIT_3, WM_SETTEXT, (WPARAM)12,(LPARAM)(_itow(_wtoi(a1) + _wtoi(a2), a3, 10)));

}