ดึงค่าจากอีกฟอร์มได้ไหมครับไม่ได้หมายถึงส่งค่าข้ามฟอร์มนะครับ

    <connectionStrings>
        <add name="Panda.Properties.Settings.strConnn" connectionString="Server=localhost;User Id=root; Password=1234; Database=panda; Pooling=false"
            providerName="MySql.Data.MySqlClient" />
    </connectionStrings>

using System.Configuration;

objConn = new MySqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["strConn"].ConnectionString);
                objConn.Open();

    Partial Friend Class MyApplication

        Private Sub MyApplication_Startup(sender As Object, e As Microsoft.VisualBasic.ApplicationServices.StartupEventArgs) Handles Me.Startup
            Dim CallCenterconstr As New System.Data.SqlClient.SqlConnectionStringBuilder(My.MySettings.Default("CallCenterConString"))
            CallCenterconstr("Password") = "enter password here"
            My.MySettings.Default("CallCenterConString") = CallCenterconstr.ToString

        End Sub
    End Class

    <applicationSettings>
        <Panda.Properties.Settings>
            <setting name="strTest" serializeAs="String">
                <value>eieieieiei</value>
            </setting>
        </Panda.Properties.Settings>
    </applicationSettings>

        private void Flogin_Load(object sender, EventArgs e)
        {
            string Tester = System.Configuration.ConfigurationManager.AppSettings["strTest"].ToString();
            MessageBox.Show(Tester);
        }

Dim st As String = My.Setting.strTest

System.Configuration.ConfigurationManager.AppSettings["strTest"].ToString();