sql server - Log-in condition in Visual Basic -


so have code , i'm having hard time giving admin privileges.
in database have boolean value is user admin. want write sql statement checks if person admin , use different form if person user. i'm new @ stuff - how go doing (with have checks if information i'm trying log-on user , take me new form) 

try     con.connectionstring = "***"     con.open()     cmd.connection = con     cmd.commandtext = "select  username, pword users" _         & " (username = '" & txtusername.text        _         & "') , (pword = '" & txtpassword.text & "')"     dim lrd sqldatareader = cmd.executereader()      if lrd.hasrows         lrd.read()          password = lrd("pword").tostring()         username = lrd("username").tostring()          password2 = txtpassword.text()         ' if passowrd = passowrd2 , username = txtusername.text then'             messagebox.show("logged in " & username, "", messageboxbuttons.ok, messageboxicon.information)              form2.show()             me.hide()             'clear fields'             txtpassword.text = ""             txtusername.text = ""         ' end if'         'end while'     else         messagebox.show("username , password not match..", "authentication failure", messageboxbuttons.ok, messageboxicon.exclamation)         'clear fields'         txtpassword.text = ""         txtusername.text = ""     end if     'end if' catch ex exception     messagebox.show("error while connecting sql server." & ex.message)     con.close() 'whether there error or not. close connection.' end try


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