帮个忙...
我想做个 用户添加 模块 ... 包括两个功能 一个添加用户 一个 修改密码

添加用户，普通的添加我会可是怎么才能做到 两次输入密码一致后 ，才执行...否则提示错误...

修改密码, 这个功能怎么才能实现，先输入原密码..原密码 正确的情况下才能修改成功的功能 大家帮下忙

[解决办法]
网上有相关的例子，楼主可以找找看，这些都是基本的东西。
随便找了几段仅供参考

Delphi(Pascal) code

 
 unit AddUse; 
  
 interface 
  
 uses 
 windows,Messages,SysUtils,Variants,Classes,Graphics,Controls,Forms, 
 Dialogs,StdCtrls,Buttons,ExtCtrls,DB,DBTables,ADODB; 
  
 type 
 TAddUseForm=class(TForm) 
   Bevel1:TBevel; 
   Label1:TLabel; 
   Label2:TLabel; 
   Label3:TLabel; 
   NewName:TEdit; 
   Password:TEdit; 
   NPassword:TEdit; 
   Add_ok:TBitBtn; 
   Add_cancel:TBitBtn; 
   RadioGroup1:TRadioGroup; 
   J0:TRadioButton; 
   J1:TRadioButton; 
   DataSource1:TDataSource; 
   Panel1:TPanel; 
   ADOTable1:TADOTable; 
   procedure Add_cancelClick(Sender:TObject); 
   procedure Add_okClick(Sender:TObject); 
   procedure FormCreate(Sender:TObject); 
 private 
   { Private declarations } 
 public 
   function FindName(const Name:string):Boolean; 
   { Public declarations } 
 end; 
  
 var 
 AddUseForm:TAddUseForm; 
  
 implementation 
 uses DataM; 
 {$R *.dfm} 
  
 procedure TAddUseForm.Add_cancelClick(Sender:TObject); 
 begin 
 Close; 
 end; 
  
 procedure TAddUseForm.Add_okClick(Sender:TObject); 
 var 
 rec:string; 
 begin 
 if NewName.Text='' then 
 begin 
   application.MessageBox(PChar('用户名不能为空！'),'警告',mb_iconexclamation); 
   NewName.SetFocus; 
   exit; 
 end; 
  
 if FindName(NewName.Text) then 
 begin 
   application.MessageBox(PChar('用户名:"'+NewName.Text+'"已存在！'),'提示',mb_iconexclamation); 
   NewName.SetFocus; 
 end 
 else 
 begin 
   if Password.Text <>NPassword.Text then 
   begin 
   application.MessageBox(PChar('"验证密码"与"密码"不相同！（请注意大小写！）'),'错误',mb_iconstop); 
   NPassword.SetFocus; 
   exit; 
   end; 
   ADOTable1.Append; 
   ADOTable1.FieldByName('用户名').AsString:=NewName.Text; 
   if Password.Text='' then 
   Password.Text:=' '; 
   ADOTable1.FieldByName('密码').AsString:=Password.Text; 
   if J0.Checked then 
   rec:='管理级' 
   else 
   rec:='普通级'; 
   ADOTable1.FieldByName('级别').AsString:=rec; 
   ADOTable1.Post; 
   if application.MessageBox(PChar('"'+NewName.Text+'"添加成功！是否继续添加？'), 
   '提示',mb_yesno+mb_iconquestion)=idyes then 
   begin 
   NewName.Text:=''; 
   Password.Text:=''; 
   NPassword.Text:=''; 
   NewName.SetFocus; 
   end 
   else 
   Close; 
 end; 
 end; 
  
 function TAddUseForm.FindName(const Name:string):Boolean; 
 begin 
 Result:=false; 
 ADOTable1.First; 
 while not ADOTable1.Eof do 
 begin 
   if ADOTable1.FieldByName('用户名').AsString=NewName.Text then 
   begin 
   Result:=true; 
   exit; 
   end; 
   ADOTable1.Next; 
 end; 
 end; 
  
 procedure TAddUseForm.FormCreate(Sender:TObject); 
 begin 
 ADOTable1.Open; 
 end; 
  
 end.