-\twocolitem{\_\_VISUALC\_\_}{Microsoft Visual C++. The value of this macro
-corresponds to the compiler version: $1020$ for $4.2$ (the first supported
-version), $1100$ for $5.0$, $1200$ for $6.0$ and so on}
+\twocolitem{\_\_VISUALC\_\_}{Microsoft Visual C++, see also
+\helpref{wxCHECK\_VISUALC\_VERSION}{wxcheckvisualcversion}. The value of this
+macro corresponds to the compiler version: $1020$ for $4.2$ (the first supported
+version), $1100$ for $5.0$, $1200$ for $6.0$ and so on. For convenience, the
+symbols \_\_VISUALCn\_\_ are also defined for each major compiler version from
+5 to 9, i.e. you can use tests such \texttt{#ifdef \_\_VISUALC7\_\_} to test
+for compiler version being precisely 7.}