给你个我用的例子:
Delphi/Pascal code
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; 脚本用 Inno Setup 脚本向导生成。 ; 查阅文档获取创建 INNO SETUP 脚本文件详细资料! [Setup] AppName=Common downloader AppVerName=Common downloader DefaultDirName= {pf} \XXX\Common downloader
DefaultGroupName=XXX\Common downloader DisableProgramGroupPage=yes OutputDir= .\Setup OutputBaseFilename=Common downloader setup V1 .0.0
Compression=lzma SolidCompression=yes VersionInfoCompany=XXX VersionInfoVersion= 1.0.0
[Languages] Name: "Chinese"; MessagesFile: "compiler:Languages\Chinese . isl"
Name: "English"; MessagesFile: "compiler:Languages\English . isl"
[Tasks] Name: "desktopicon"; Description: " {cm:CreateDesktopIcon} "; GroupDescription: " {cm:AdditionalIcons} "; Flags: dontinheritcheck
[Files] Source: "CMDL . exe"; DestName: "Common downloader . exe"; DestDir: " {app} "; Flags: ignoreversion
Source: "DL . dll"; DestDir: " {app} "; Flags: ignoreversion
Source: "DM . dll"; DestDir: " {app} "; Flags: ignoreversion
Source: "config . ini"; DestDir: " {app} "; Flags: ignoreversion
Source: "App\*"; DestDir: " {app} \\App"; Flags: ignoreversion recursesubdirs createallsubdirs
Source: "Boot\*"; DestDir: " {app} \\Boot"; Flags: ignoreversion recursesubdirs createallsubdirs
Source: "Resource_cn\*"; DestDir: " {app} \Resource"; Languages: Chinese; Flags: ignoreversion recursesubdirs createallsubdirs
Source: "Resource_en\*"; DestDir: " {app} \Resource"; Languages: English; Flags: ignoreversion recursesubdirs createallsubdirs
; 注意: 不要在任何共享系统文件中使用“Flags: ignoreversion” [Icons] Name: " {group} \Common downloader"; Filename: " {app} \Common downloader . exe"
Name: " {group} \ {cm:UninstallProgram,Common downloader} "; Filename: " {uninstallexe} "
Name: " {userdesktop} \Common downloader"; Filename: " {app} \Common downloader . exe"; Tasks: desktopicon
[Run] Filename: " {app} \Common downloader . exe"; Description: " {cm:LaunchProgram,Common downloader} "; Flags: nowait postinstall skipifsilent
[Registry] Root: HKLM; Subkey: "Software\XXX"; Flags: createvalueifdoesntexist Root: HKLM; Subkey: "Software\XXX\Common downloader"; Flags: uninsdeletekeyifempty Root: HKLM; Subkey: "Software\XXX\Common downloader"; ValueType: string ; ValueName: "Path"; ValueData: " {app} "
Root: HKLM; Subkey: "Software\XXX\Common downloader"; ValueType: string ; ValueName: "Version"; ValueData: "V1 .0.0 "
Root: HKLM; Subkey: "Software\XXX\Common downloader"; ValueType: dword; ValueName: "VersionNum"; ValueData: " 100 "
Root: HKLM; Subkey: "Software\XXX\Common downloader"; ValueType: string ; ValueName: "Release Date"; ValueData: " 2008 / 09 / 29 "
[Code] function InitializeSetup(): Boolean ;
var Version: string ;
strPath: string ;
ResultCode: Integer ;
begin Result:= TRUE ;
//read the version
if RegQueryStringValue(HKEY_LOCAL_MACHINE, 'Software\XXX\Common downloader' ,
'Version' , Version) then
begin
// Successfully read the value
Version := Format( 'Exist the version %s,whether uninstall it?' ,[Version]);
if MsgBox(Version,mbConfirmation,MB_YESNO) = IDYES then
begin
//read the path
if RegQueryStringValue(HKEY_LOCAL_MACHINE, 'Software\XXX\Common downloader' ,
'Path' , strPath) then
begin
// Successfully read the value
strPath:= strPath + '\unins000.exe' ;
Exec(ExpandConstant(strPath), '' , '' , SW_SHOW,
ewWaitUntilTerminated, ResultCode);
end ;
end else
Result:= FALSE ;
end ;
end ;
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这个例子可以在安装之前卸载以前的版本,并提示你卸载之前的版本信息。