... vNull.vt = VT_ERROR; Teach Yourself Database Programming with Visual C++ 6 in 21 days Day 5- Adding, Modifying, and Deleting Datahttp://www.pbs.mcp.com/ebooks/ 067 231 350 2/ch 05/ ch 05. htm (6 of 10) [9/22/1999 ... e.ErrorMessage()); Teach Yourself Database Programming with Visual C++ 6 in 21 days Day 5- Adding, Modifying, and Deleting Datahttp://www.pbs.mcp.com/ebooks/ 067 231 350 2/ch 05/ ch 05. htm (5 of 10) [9/22/1999 ... query. Change the Teach Yourself Database Programming with Visual C++ 6 in 21 days Day 5- Adding, Modifying, and Deleting Datahttp://www.pbs.mcp.com/ebooks/ 067 231 350 2/ch 05/ ch 05. htm (7 of 10) [9/22/1999...