C#

private void btnCancel_Click(object sender, EventArgs e)
{
    this.Close();
    this.Dispose();
}

OleDbConnection conn = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=W:\CS Call Info\MobEmail.mdb");
OleDbCommand cmd;

private void btnLogon_Click(object sender, EventArgs e)
{
    //Connection Code
    string sql = "SELECT UserName,Password FROM Users WHERE UserName = '"
        + txtboxUserName.Text + "' AND Password = '" + txtboxPassword.Text + "'";
    OleDbCommand cmd = new OleDbCommand(sql, conn);
    OleDbDataReader dr = cmd.ExecuteReader();

    try
    {
        //Open the Connection
        conn.Open();
    }
    catch (InvalidOperationException ex)
    {
        MessageBox.Show(ex.Message.ToString());
    }

    try
    {
        //Read Database
        if (dr.Read == false) //This is where the error is
        {
            MessageBox.Show("Invalid Username And Or Password Supplied", "Logon Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
        }

        else
        {
            this.DialogResult = DialogResult.OK;
        }
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message.ToString());
    }
    if (conn.State != ConnectionState.Closed)
    {
        conn.Close();
    }

<br />
[DllImport("USER32.DLL")]<br />
public static extern int SendMessage(IntPtr hwnd, int<br />
msg, int character, int count);<br />
<br />
[Flags]<br />
public enum MouseEventFlags<br />
{<br />
LEFTDOWN = 0x00000002,<br />
LEFTUP = 0x00000004,<br />
MIDDLEDOWN = 0x00000020,<br />
MIDDLEUP = 0x00000040,<br />
MOVE = 0x00000001,<br />
ABSOLUTE = 0x00008000,<br />
RIGHTDOWN = 0x00000008,<br />
RIGHTUP = 0x00000010<br />
} <br />
<br />
--- THE ACTUAL CODE ---<br />
<br />
// position the mouse <br />
SetCursorPos(ox + xx, oy + yy);<br />
<br />
// hold down shift<br />
win32.SendMessage(phwnd, 0x0100, 0xA0, 0); // left shift<br />
<br />
// click the mouse<br />
mouse_event((uint)MouseEventFlags.RIGHTDOWN, 0, 0, 0, 0);<br />
mouse_event((uint)MouseEventFlags.RIGHTUP, 0, 0, 0, 0);<br />
<br />
// release shift<br />
win32.SendMessage(phwnd, 0x0101, 0xA0, 1); // left shift<br />
<br />