-#define VWIN32_DIOC_DOS_IOCTL 1 // DOS ioctl calls 4400h-4411h
-#define VWIN32_DIOC_DOS_INT25 2 // absolute disk read, DOS int 25h
-#define VWIN32_DIOC_DOS_INT26 3 // absolute disk write, DOS int 26h
-#define VWIN32_DIOC_DOS_INT13 4 // BIOS INT13 functions
+#define VWIN32_DIOC_DOS_IOCTL 1 /* DOS ioctl calls 4400h-4411h */
+#define VWIN32_DIOC_DOS_INT25 2 /* absolute disk read, DOS int 25h */
+#define VWIN32_DIOC_DOS_INT26 3 /* absolute disk write, DOS int 26h */
+#define VWIN32_DIOC_DOS_INT13 4 /* BIOS INT13 functions */