大家好,我在定义了一个类模块,用于数据库连接的如下: option explicit public cn as adodb.connection public rs as recordset public sub dbload() set cn = new connection cn.cursorlocation = aduseclient cn.open "driver={sql server};server=192.168.1.254;uid=sa;pwd=admin.com;database=vbst " end sub private sub main() if app.previnstance = true then msgbox "程序已经在运行! ", 64: exit sub call dbload form1.show end sub