C / C++ / MFC

error LNK2001: unresolved external symbol "public: void __thiscall CDBFRecordset::Open(char const *,unsigned int)" (?Open@CDBFRecordset@@QAEXPBDI@Z)

typedef struct
{
	DBF_UCHAR dbf_id;		// 0x02 FoxBASE
							// 0x03 FoxBASE+/dBASE III PLUS, no memo
							// 0x30 Visual FoxPro
							// 0x43 dBASE IV SQL table files, no memo
							// 0x63 dBASE IV SQL system files, no memo
							// 0x83 FoxBASE+/dBASE III PLUS, with memo
							// 0x8B dBASE IV with memo
							// 0xCB dBASE IV SQL table files, with memo
							// 0xE5 HiPer-SIx with memo (.SMT)
							// 0xF5 FoxPro 2.x (or earler) with memo
							// 0xFB FoxBASE
	DBF_CHAR last_update[3];// Last update (YYMMDD)
							// Fox: curent century + YY
							// dBase: 1900 + YY
							// SIx: 0x700(1792) + YY
	DBF_LONG last_rec;		// Number of record in file
	DBF_UINT data_offset;	// Position of first data record
	DBF_UINT rec_size;		// Lenght of one data record (including delete flag)
	DBF_CHAR filler[16];	// Reserved
	DBF_CHAR table_flag;	// Table Flags (Only Visual Foxpro)
							// 0x01 file has structural .cdx or .mdx
							// 0x02 file has a Memo field
							// 0x04 file is a database .dbc
							// Note that this byte can contain the sum of
							// any of the above values.
	DBF_UCHAR code_page;	// Code page mark
							// 0x01 437    U.S. MS-DOS
							// 0x69	620    Mazovia (Polish) MS-DOS
							// 0x6A 737    Greek MS-DOS (437G)
							// 0x02 850    International MS-DOS
							// 0x64 852    Eastern European MS-DOS
 							// 0x67 861    Icelandic MS-DOS
 							// 0x66 865    Nordic MS-DOS
 							// 0x65 866    Russian MS-DOS
 							// 0x68 895    Kamenicky (Czech) MS-DOS
 							// 0x6B 857    Turkish MS-DOS
 							// 0xC8 1250   Eastern European Windows
 							// 0xC9 1251   Russian Windows
 							// 0x03 1252   Windows ANSI
 							// 0xCB 1253   Greek Windows
 							// 0xCA 1254   Turkish Windows
 							// 0x04	10000  Standard Macintosh
 							// 0x98 10006  Greek Macintosh
 							// 0x96 10007  Russian Macintosh
 							// 0x97	10029  Eastern European Macintosh
	DBF_UINT reserved;		// Recerved, contains 0x00
} DBF_HEAD;