vb.net - Visual basic database login: manager and admin logins -

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i have code open form if login credentials matches database. dont know how add separate login manager. in database made column yes/no called ismanager , checked 1 of users cant seem if checked , open different form. can please improve code make change?

public class login  public function login()     'save database file in u:\my documents\visual studio 2008\projects\sequenceselectionrepetition\sequenceselectionrepetition\bin\debug     'right-click sequenceselectionrepetition solution explorer , select add reference     'choose com , choose microsoft activex daba objects 2.5 library     dim dbconn new adodb.connection     dim users new adodb.recordset     dim username string     dim userdb string     dim passdb string     dim userfound boolean      dbconn.open("provider = microsoft.ace.oledb.12.0;" & "data source = '" & application.startuppath & "\capsule staff.accdb'")     users.open("credentials", dbconn, adodb.cursortypeenum.adopenstatic, adodb.locktypeenum.adlockoptimistic)      userfound = false     username = "id = '" & txtusername.text & "'"      users.find(username)     if users.bof = false , users.eof = false         userdb = users.fields("id").value.tostring         passdb = users.fields("password").value.tostring          if userdb <> txtusername.text             users.close()             dbconn.close()             return false         else             userfound = true             if passdb = txtpassword.text                 users.close()                 dbconn.close()                 return true             else                 users.close()                 dbconn.close()                 return false             end if         end if     end if     'user not found     users.close()     dbconn.close()     return false end function   private sub button1_click(byval sender system.object, byval e system.eventargs) handles button1.click     if login() = true         messagebox.show("manager login successful")         manager.show()         me.hide()         txtusername.clear()         txtpassword.clear()     elseif login() = true         messagebox.show("login successful")         register.show()         me.hide()         txtusername.clear()         txtpassword.clear()     else         messagebox.show("error:unable login, refer user manual more information")         txtusername.clear()         txtpassword.clear()     end if  end sub

end class


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