下面就是编译结果，提示OLEDBDataSetCommand没有定义！
Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.
Compiler Error Message: BC30002: Type 'OLEDBDataSetCommand' is not defined.
Source Error:
Line 19:con.Open()
Line 20:dim cmd as string="select * from info"
Line 21:dim dsc as OLEDBDataSetCommand=New OLEDBDataSetCommand(cmd,con)
Line 22:'dim dsc as DataSetCommand=New DataSetCommand(cmd,con)
