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1£©ÔÚUsesÖÐÌí¼ÓRegistryµ¥Ôª£»
2£©ÉùÃ÷TRegistry¶ÔÏó£»
3£©´´½¨TRegistry¶ÔÏó£»
4£©Ö¸¶¨¸ù¼ü£»
----------------try------------------
5£©´ò¿ªÐèÒª²Ù×÷µÄÖ÷¼ü£»
6£©¶Áд²Ù×÷£»
7£©±£´æ²¢¹Ø±ÕÖ÷¼ü£»
--------------finally----------------
8£©ÊÍ·ÅTRegistry¶ÔÏó£»
---------------end------------------
==========================================================
Uses Registry;    //Ìí¼ÓRegistryµ¥Ôª£»
var
    MyReg: TRegistry;    //ÉùÃ÷TRegistry¶ÔÏó£»
begin
    MyReg := TRegistry.Create;   //´´½¨TRegistry¶ÔÏó£»
    try
        MyReg.RootKey := HKEY_LOCAL_MACHINE; //Ö¸¶¨¸ù¼ü£»
        if MyReg.OpenKey('Ö÷¼üÃû', true) then  //´ò¿ªÐèÒª²Ù×÷µÄÖ÷¼ü£»
        begin
            MyReg.ReadType(---);   //¶Á×¢²á±íÎļþ
            MyReg.WriteType(---);   //дע²á±íÎļþ
        end;
        MyReg.CloseKey;   //±£´æ²¢¹Ø±ÕÖ÷¼ü£»
    finally
        MyReg.Free;    //ÊÍ·ÅTRegistry¶ÔÏó£»
    end;
end;
==========================================================
function OpenKey(const Key:String; CanCreate:Boolean):Boolean;
//µÚ¶þ¸ö²ÎÊýÖ¸Ã÷£¬Èç¹ûÐèÒª´ò¿ªµÄÖ÷¼ü²»´æÔÚʱÊÇ·ñ´´½¨¸ÃÖ÷¼ü
function CreateKey(const Key:String):Boolean;
//´Ë·½·¨ÓÃÓÚ´´½¨Ö÷¼ü£¬Êµ¼ÊÉϲ¢²»³£ÓÃ
function KeyExists(const Key:String):Boolean;
//ÅжÏÖ÷¼üÊÇ·ñ´æÔÚ
(***¶ÔÓÚ×Ö·û´®ÀàÐ͵IJÙ×÷º¯Êý***)
function ReadString(const Name: String):String;
procedure WriteString(const Name, Value: String);
//¶ÔÓÚÆäËüÊý¾ÝÀàÐ͵Ä×¢²á±í¶Áд


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Delphi ÖÐµÄ Var buffer ¿ªÀàÐͲÎÊý

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ÏóDelphiÖÐfunction   Read(var   Buffer;   Count:   Longint):   Longint;   override;ÏóBufferÕâÑùûÓÐÀàÐ͵IJÎÊý¾¿¾¹Ó¦¸ÃÔõô¸ø²ÎÊý£¿£¿£¿£¿  
  Õâ˵Ã÷BufferÊÇͨ¹ýµØÖ··½Ê½´«µÝµÄ£¬Ò»°ã˵À´Ö» ......

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 AssignFile(var F; FileName :string)£»
2£©³õʼ»¯Îļþ£º
 Append(var F :Text);   
 //ֻд£¬ÓÚÎļþ×îºó×·¼ÓÊý¾Ý
 Reset(var F [; RecSize :Word]);     ......

delphi±à³ÌÀïµÄbool¸úbooleanÀàÐÍÓÐÊ²Ã´Çø±ð

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WordBool 2 Bytes£¨1 Word£©
LongBool 4 Bytes£¨2 Words£©
¶Ô ......

Delphi to Excel һЩ·½·¨

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  Ê×ÏÈ´´½¨   Excel   ¶ÔÏó£¬Ê¹ÓÃComObj: 
  var   ExcelApp:   Variant; 
  ExcelApp   :=   CreateOleObject(   'Excel.Application'  ......

Delphi¶àÏß³Ìѧϰ£º¶àÏß³ÌÊý¾Ý¿â²éѯ£¨ADO£©

ADO¶àÏß³ÌÊý¾Ý¿â²éѯͨ³£»á³öÏÖ3¸öÎÊÌ⣺
1¡¢CoInitialize ûÓе÷ÓÃ
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called£©£»ËùÒÔ£¬ÔÚʹÓÃÈκÎdbGo¶ÔÏóǰ£¬±ØÐëÊÖ
µ÷ÓÃCoInitializeºÍCoUninitialize¡£µ÷ÓÃCoInitializeʧ°Ü»á²úÉú"CoInitialize was not
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2¡¢»­²¼²»ÔÊÐí»æ»­
£¨Canvas does not allow
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