diff --git a/src/if_cscope.h b/src/if_cscope.h
new file mode 100644
index 0000000..b3149d6
--- /dev/null
+++ b/src/if_cscope.h
@@ -0,0 +1,96 @@
+/* vi:set ts=8 sts=4 sw=4:
+ *
+ * CSCOPE support for Vim added by Andy Kahn <kahn@zk3.dec.com>
+ * Ported to Win32 by Sergey Khorev <khorev@softlab.ru>
+ *
+ * The basic idea/structure of cscope for Vim was borrowed from Nvi.
+ * There might be a few lines of code that look similar to what Nvi
+ * has.  If this is a problem and requires inclusion of the annoying
+ * BSD license, then sue me; I'm not worth much anyway.
+ */
+
+#if defined(FEAT_CSCOPE) || defined(PROTO)
+
+#if defined(UNIX)
+#include <sys/types.h>		/* pid_t */
+#include <sys/stat.h>		/* dev_t, ino_t */
+#elif defined (WIN32)
+# ifndef WIN32_LEAN_AND_MEAN
+#  define WIN32_LEAN_AND_MEAN
+# endif
+# include <windows.h>
+#endif
+
+#define CSCOPE_SUCCESS		0
+#define CSCOPE_FAILURE		-1
+#define CSCOPE_MAX_CONNECTIONS	8   /* you actually need more? */
+
+#define	CSCOPE_DBFILE		"cscope.out"
+#define	CSCOPE_PROMPT		">> "
+#define	CSCOPE_QUERIES		"sgdct efi"
+
+/*
+ * s 0name	Find this C symbol
+ * g 1name	Find this definition
+ * d 2name	Find functions called by this function
+ * c 3name	Find functions calling this function
+ * t 4string	find text string (cscope 12.9)
+ * t 4name	Find assignments to (cscope 13.3)
+ *   5pattern	change pattern -- NOT USED
+ * e 6pattern	Find this egrep pattern
+ * f 7name	Find this file
+ * i 8name	Find files #including this file
+ */
+#define	FIND_USAGE "find c|d|e|f|g|i|s|t name"
+#define FIND_HELP "\n\
+       c: Find functions calling this function\n\
+       d: Find functions called by this function\n\
+       e: Find this egrep pattern\n\
+       f: Find this file\n\
+       g: Find this definition\n\
+       i: Find files #including this file\n\
+       s: Find this C symbol\n\
+       t: Find assignments to\n"
+
+
+typedef struct {
+    char *  name;
+    int     (*func) __ARGS((exarg_T *eap));
+    char *  help;
+    char *  usage;
+    int	    cansplit;		/* if supports splitting window */
+} cscmd_T;
+
+typedef struct csi {
+    char *	    fname;	/* cscope db name */
+    char *	    ppath;	/* path to prepend (the -P option) */
+    char *	    flags;	/* additional cscope flags/options (e.g, -p2) */
+#if defined(UNIX)
+    pid_t	    pid;	/* PID of the connected cscope process. */
+    dev_t	    st_dev;	/* ID of dev containing cscope db */
+    ino_t	    st_ino;	/* inode number of cscope db */
+#elif defined(WIN32)
+    int	    pid;	/* Can't get pid so set it to 0 ;) */
+    HANDLE	    hProc;	/* cscope process handle */
+    DWORD	    nVolume;	/* Volume serial number, instead of st_dev */
+    DWORD	    nIndexHigh;	/* st_ino has no meaning in the Windows */
+    DWORD	    nIndexLow;
+#endif
+
+    FILE *	    fr_fp;	/* from cscope: FILE. */
+    FILE *	    to_fp;	/* to cscope: FILE. */
+} csinfo_T;
+
+typedef enum { Add, Find, Help, Kill, Reset, Show } csid_e;
+
+typedef enum {
+    Store,
+    Get,
+    Free,
+    Print
+} mcmd_e;
+
+
+#endif	/* FEAT_CSCOPE */
+
+/* the end */