Dim cmd As New SQLCommand
Dim dt As DataTable
cmd.ConnectionName = "数据源"
cmd.CommandText = "SELECT * From {用户表} Where [用户] = '" & _UserName & "'"
dt = cmd.ExecuteReader
If dt.DataRows.Count > 0 Then
Dim Proc As New Process '定义一个新的Process
Proc.File = "tencent://message/?uin=" & dt.Datarows(0)("QQ号")
Proc.Start()
End If
End If