在Delphi3.0 及以上版本中,提供了一个构件TRegistry。在程序中可以利用它来实现对WIN95/98/NT 注册表的操作,可以很方便地在注册表中增加、修改和删除键值。这样可以在程序中完成一些特殊的功能。 <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
---- TRegistry 常用的属性和方法有(具体作用和用法请参考Delphi 帮
助):
RootKey、CreateKey、OpenKey、CloseKey、DeleteKey、ReadXXXX、WriteXXXX
(XXXX表示数据类型如String、Integer等)
我们用到的属性和方法有:
RootKey:注册表的根键名( 如HKEY_LOCAL_MACHINE等)
OpenKey( KeyName:string; CanCreate:boolean ):
使当前键为KeyName,CanCreate 表示当指定的键不存在时是否创建,True 表示创建
SetKey( KeyName,KeyValue : string ):使键KeyName的值为KeyValue
---- 应用之一:让自己的程序随WIN95/98/NT 的启动而运行
当然,你可以在"启动"程序组中加入程序的快捷方式,但这样做好象不大明智,因为大多数程序在安装时不会这样做,而是在通过在注册表增加键值,让WIN95/98/NT 在启动时运行自己的程序。如果打开注册表,找到HKEY_LOCAL_MACHINE "Software "Microsoft"Windows "CurrentVersion "Run,就会发现这个秘密了,原来许多自动运行的程序都在这里。你也可以在这里增加一个键,让你的程序也随着 WIN95/98/NT 的启动而自己运行,成为WINDOWS 下的TSR 程序。实现方法如下:
首先,在Uses 中加上Registry 单元
然后,写下面代码。
{将程序strExeFileName置为自动启动 }
1
function StartUpMyProgram ( strPrompt,strExeFileName : string ) : boolean;
2![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
3
var
4![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
5
registerTemp : TRegistry;
6![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
7
begin
8![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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registerTemp := TRegistry.Create;
10![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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//建立一个Registry实例
12![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
13
with registerTemp do
14![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
15
begin
16![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
17
RootKey:=HKEY_LOCAL_MACHINE;
18![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
19
//设置根键值为HKEY_LOCAL_MACHINE
20![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
21
//找到Software\Microsoft\Windows\CurrentVersion\Run
22![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
23
if OpenKey('Software\Microsoft\Windows\CurrentVersion\Run',True) then
24![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
25
//写入自己程序的快捷方式信息
26![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
27
begin
28![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
29
WriteString( strPrompt, strExeFileName );
30![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
31
result := true;
32![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
33
end
34![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
35
else result := false;
36![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
37
//善后处理
38![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
39
CloseKey;
40![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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Free;
42![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
43
end;
44![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
45
end;
46![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
47
{调用StartUpMyProgram,
48![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
49
使Delphi随WINDOWS启动而自动运行 }
50![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
51
procedure TForm1.Button1Click(Sender: TObject);
52![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
53
begin
54![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
55
memo1.lines.add('开始');
56![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
57
if StartUpMyProgram('delphi','C:\Program Files\borland\delphi3\bin\delphi32.exe') then
58![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
59
memo1.lines.add('成功')
60![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
61
else
62![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
63
memo1.lines.add('失败')
64![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
65
end;
66![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
67![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
---- 应用之二:实现文件关联
当MS WORD 安装在你的系统中时,它会把.DOC 文件与自己关联,当你双击一个DOC 文件,就会启动MS WORD,打开你指定的DOC文件。你也可以把一个文件类型与一个程序关联起来,其秘密还是在注册表中。如果打开注册表,找到HKEY_CLASSES_ROOT,就会发现这里已经有很多文件类型。
你也可以在这里增加一个键,建立自己的文件关联。
建立文件关联,一般应有两个步骤:
(1)根据文件类型的扩展名,指定对应的键名(如doc 文件对应的键为doc_auto_file)
该键及其子键的值,将定义该类型的文件的类型说明和操作(如打开、编辑)说明
(2)在指定的键名下,建立子键,指明文件类型说明和操作对应的程序信息
例如,我们可以为.DBF 文件建立文件关联,其文件类型说明为"xBase 数据表",使其打开(Open)文件的操作对应程序C:"ProgramFiles"Borland"DBD"DBD32.EXE。首先,应在注册表的根键HKEY_CLASSES_ROOT 下建立一个键,键名为.DBF,默认值为DBF_Auto_File,表示DBF 类型文件的关联操作信息记录在键HKEY_CLASSES_ROOT"DBF_Auto_File 下;然后,建立键
HKEY_CLASSES_ROOT"DBF_Auto_File,并设其默认值为"xBase 数据表",表示文件类型说明;再建立键HKEY_CLASSES_ROOT"DBF_Auto_File"Shell"open"command,设置其默认值为C:"Program Files"Borland"DBD"DBD32.EXE %1(其中"%1 "为命令行参数),表示打开操作对应的程序信息。
具体实现如下:同样,在Uses 中加上Registry 单元, 然后,写下面代码。
{将文件类型strFileExtension与程序
strExeFileName相关联,strDiscription为文件类型说明 }
function AssignToProgram(strFileExtension,strDiscription,strExeFileName : string ) : boolean;
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
var
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
registerTemp : TRegistry;
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
begin
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
registerTemp := TRegistry.Create;
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
//建立一个Registry实例
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
with registerTemp do
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
begin
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
RootKey:=HKEY_CLASSES_ROOT;
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
//设置根键值为HKEY_CLASSES_ROOT
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
//根据文件类型的扩展名,创建或打开对应的键名.FileExt,如DBF对应'.DBF'
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
if OpenKey( '.' + strFileExtension, true ) then
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
begin
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
result := false;
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
exit;
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
end;
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
//设置键.FileExt默认值为FileExt_Auto_File,如'.DBF'对应'DBF_Auto_File'
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
WriteString('',strFileExtension + '_Auto_File');
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
CloseKey;
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
//写入自己程序的信息
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
//根据文件类型的扩展名,创建或打开对应的键名
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
FileExt_Auto_File
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
//'.DBF'对应'DBF_Auto_File'
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
if OpenKey(strFileExtension + '_Auto_File', true ) then
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
begin
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
result := false;
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
exit;
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
end;
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
//设置默认值文件类型说明,如DBF可对应'xBase数据表'
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
WriteString('',strDiscription);
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
CloseKey;
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
//创建或打开键名FileExt_Auto_File\Shell\open\command,该键为表示操作为'打开'
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
//'.DBF'对应'DBF_Auto_File\shell\open\command'
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
if OpenKey(strFileExtension + '_Auto_File\shell\open\command', true ) then
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
begin
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
result := false;
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
exit;
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
end;
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
//设置该键的默认值为打开操作对应的程序信息
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
//如DBF可对应'C:\Program Files\Borland\DBD\DBD32.EXE'
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
WriteString('',strExeFileName + ' %1');
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
CloseKey;
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
Free;
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
end;
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
end;
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
{调用AssignToProgram,使DBF文件与DBD32.EXE关联 }
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
procedure TForm1.Button3Click(Sender: TObject);
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
begin
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
memo1.lines.add('开始');
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
if AssignToProgram('DBF','xBase数据表','C:\Program Files\borland\dbd\dbd32.exe') then
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
memo1.lines.add('成功')
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
else
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
memo1.lines.add('失败')
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
end;
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
---- 应用之三:检测Win95/98/NT 系统中是否安装了Borland Database Engine
当你的应用程序是一个基于BDE 的数据库应用程序时,如果运行在一个没有安装BDE 的Win95/98/NT 中,会出现让用户迷惑不解的错误。你可能需要在程序正常运行之前,检查系统中是否安装了BDE。由于 BDE 安装后会在注册表进行注册,你可以通过查询注册表来确定系统中是否安装了BDE,然后决定下一步采取什么行动。BDE 在注册表中的位置为:
HKEY_LOCAL_MACHINE\Software\Borland\Database Engine,该键存在说明 BDE 已经安装。
具体的例子如下。
同样,在Uses 中加上Registry 单元
然后,写下面代码。
{检测系统中是否安装了BDE }
1
function IsBDEInstalled : boolean;
2![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
3
var
4![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
5
registerTemp : TRegistry;
6![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
7
begin
8![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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registerTemp := TRegistry.Create;
10![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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//建立一个Registry实例
12![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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with registerTemp do
14![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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begin
16![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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RootKey:=HKEY_LOCAL_MACHINE;
18![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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//设置根键值为HKEY_LOCAL_MACHINE
20![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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//查询Software\Borland\Database Engine
22![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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result := OpenKey('Software\Borland\Database Engine',false);
24![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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//善后处理
26![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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CloseKey;
28![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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Free;
30![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
31
end;
32![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
33
end;
34![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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{调用IsBDEInstalled,检测系统中是否安装了BDE }
36![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
37
procedure TForm1.Button4Click(Sender: TObject);
38![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
39
begin
40![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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memo1.lines.add('开始');
42![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
43
if IsBDEInstalled then
44![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
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memo1.lines.add('已安装了BDE')
46![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
47
else
48![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
49
memo1.lines.add('未安装BDE')
50![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
51
end;
52![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
53![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
---- 应用之四:在桌面建立程序的快捷方式
当你的WIN95/98/NT 桌面上整齐地排列着各种程序的快捷方式时,也许你会体会到快捷方式的方便。你也可将自己设计的程序的快捷方式放在别人的桌面上。
桌面上的一个快捷方式,对应Windows 目录下Destop 子目录中的一个ShellLink 文件(.LNK),你只要在这个目录下增加一个.LNK 文件就可以了。
我们的任务,主要是利用TRegistry 从注册表中获取Desktop 的实际路径,默认为Windows 目录下的Desktop 子目录,如C:"PWIN98"Desktop。在注册表中Desktop 的实际路径对应的键为HKEY_CURRENT_USER "Software"MicroSoft "Windows "CurrentVersion "Explorer "Shell Folders "Desktop。
同样,在Uses 中加上Registry 单元
然后,写下面代码。
{为程序strExeFileName在桌面建立快捷方式,运行参数为strParameters }
1
function CreateShortcutOnDesktop( strExeFileName, strParameters : string ) : boolean;
2![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
3
var
4![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
5
registerTemp : TRegistry;
6![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
7
strDesktopDirectory : widestring;
8![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
9
shelllinkTemp : IShellLink;
10![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
11
persistfileTemp : IPersistFile;
12![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
13
begin
14![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
15
registerTemp := TRegistry.Create;
16![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
17
//建立一个Registry实例
18![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
19
with registerTemp do
20![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
21
begin
22![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
23
RootKey:=HKEY_CURRENT_USER;
24![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
25
//设置根键值为HKEY_CURRENT_USER
26![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
27
//找到Software\MicroSoft\Windows\CurrentVersion\Explorer\Shell Folders
28![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
29
if not OpenKey('Software\MicroSoft\Windows\CurrentVersion\Explorer\Shell Folders',True) then
30![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
31
//写入自己程序的信息
32![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
33
begin
34![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
35
result := false;
36![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
37
exit;
38![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
39
end;
40![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
41
//读取项目Desktop的值,即Desktop的实际路径
42![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
43
strDesktopDirectory := ReadString('Desktop');
44![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
45
//善后处理
46![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
47
CloseKey;
48![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
49
Free;
50![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
51
end;
52![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
53
//设置快捷方式的参数
54![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
55
shelllinkTemp := IShellLink( CreateComObject(CLSID_ShellLink));
56![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
57
with shelllinkTemp do
58![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
59
begin
60![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
61
SetPath( PChar( strExeFileName ) );
62![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
63
//设置程序文件全名
64![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
65
SetArguments( PChar( strParameters) );
66![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
67
//设置程序的命令行参数
68![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
69
//设置程序的工作目录
70![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
71
SetWorkingDirectory( Pchar( ExtractFilePath( strExeFileName ) ) );
72![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
73
end;
74![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
75
//构造快捷方式的文件名(.LNK)
76![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
77
strDesktopDirectory := strDesktopDirectory + '\' + ExtractFileName( strExeFileName );
78![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
79
strDesktopDirectory := copy( strDesktopDirectory, 1, length( strDesktopDirectory ) - length( ExtractFileExt( strExeFileName ) ) ) + '.LNK';
80![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
81
//保存快捷方式的文件
82![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
83
persistfileTemp := shelllinkTemp as IPersistFile;
84![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
85
if S_OK = persistfileTemp.Save( PWChar( strDesktopDirectory ) , false ) then
86![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
87
result := true //保存成功,返回True
88![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
89
else result := false;
90![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
91
end;
92![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
93
{调用CreateShortcutOnDesktop,为Delphi在桌面上建立快捷方式 }
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procedure TForm1.Button2Click(Sender: TObject);
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begin
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memo1.lines.add('开始');
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if CreateShortcutOnDesktop('C:\Program Files\borland\delphi3\bin\delphi32.exe','%1') then
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memo1.lines.add('成功')
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else
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memo1.lines.add('失败')
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end;
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【结语】:上面几个应用只是TRegistry 一些简单的应用,有了这些知识,你就可以根据自己的需要来定制和改善Winodws 系统了。