+INT_PTR CALLBACK system_tab_proc(HWND hsystab, UINT msg, WPARAM wparam, LPARAM lparam)
+{
+�� �� switch(msg)
+�� �� {
+�� �� case WM_COMMAND:
+�� �� �� �� switch(HIWORD(wparam))
+�� �� �� �� {
+�� �� �� �� case BN_CLICKED:
+�� �� �� �� �� �� switch(wparam)
+�� �� �� �� �� �� {
+�� �� �� �� �� �� case IDC_WHQL_CHECKBOX:
+�� �� �� �� �� �� {
+�� �� �� �� �� �� �� �� update_dxdiag_info();
+�� �� �� �� �� �� �� �� return TRUE;
+�� �� �� �� �� �� }
+�� �� �� �� �� �� }
+�� �� �� �� �� �� break;