first commit for openGauss connect odbc code

pgenlist.h

@@ -0,0 +1,42 @@
+/* File:			enlist.h
+ *
+ * Description:		See "msdtc_enlist.c"
+ *
+ * Comments:		See "readme.txt" for copyright and license information.
+ *
+ */
+
+#ifndef __PGENLIST_H__
+#define __PGENLIST_H__
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+#ifdef	WIN32
+#ifdef	_HANDLE_ENLIST_IN_DTC_
+
+#undef	DLL_DECLARE
+#ifdef	_PGENLIST_FUNCS_IMPLEMENT_
+#define	DLL_DECLARE	_declspec(dllexport)
+#else
+#ifdef	_PGENLIST_FUNCS_IMPORT_
+#define	DLL_DECLARE	_declspec(dllimport)
+#else
+#define	DLL_DECLARE
+#endif /* _PGENLIST_FUNCS_IMPORT_ */
+#endif /* _PGENLIST_FUNCS_IMPLEMENT_ */
+
+RETCODE	EnlistInDtc(void *conn, void *pTra, int method);
+RETCODE	DtcOnDisconnect(void *);
+RETCODE	IsolateDtcConn(void *, BOOL continueConnection);
+//	for testing
+DLL_DECLARE	void	*GetTransactionObject(HRESULT *hres);
+DLL_DECLARE	void	ReleaseTransactionObject(void *);
+
+#endif /* _HANDLE_ENLIST_IN_DTC_ */
+#endif /* WIN32 */
+
+#ifdef	__cplusplus
+}
+#endif
+#endif /* __PGENLIST_H__ */