[Code]
// 检查 .NET Framework 4.8
function IsNetFramework48Installed(): Boolean;
var
    RegKey: String;
    Release: Cardinal;
begin
    Result := False;
    RegKey := 'SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full';
    
    if RegKeyExists(HKLM, RegKey) then
    begin
        if RegQueryDWordValue(HKLM, RegKey, 'Release', Release) then
        begin
            // Release >= 528040 表示已安装 .NET Framework 4.8
            Result := Release >= 528040;
        end;
    end;
end;

// 检查 WebView2 Runtime
function IsWebView2Installed(): Boolean;
var
    RegKey: String;
begin
    Result := False;
    // 检查 32 位注册表
    RegKey := 'SOFTWARE\WOW6432Node\Microsoft\EdgeUpdate\Clients\{F3017226-FE2A-4295-8BDF-00C3A9A7E4C5}';
    if RegKeyExists(HKLM, RegKey) then
    begin
        Result := True;
        Exit;
    end;
    
    // 检查 64 位注册表
    RegKey := 'SOFTWARE\Microsoft\EdgeUpdate\Clients\{F3017226-FE2A-4295-8BDF-00C3A9A7E4C5}';
    if RegKeyExists(HKLM, RegKey) then
    begin
        Result := True;
    end;
end;

// 检查 VC++ Runtime
function IsVCRedistInstalled(): Boolean;
var
    RegKey: String;
begin
    Result := False;
    // 检查最新版本的 VC++ Runtime (14.0)
    RegKey := 'SOFTWARE\Microsoft\VisualStudio\14.0\VC\Runtimes\x64';
    if RegKeyExists(HKLM, RegKey) then
    begin
        Result := True;
        Exit;
    end;
    
    // 32位系统检查
    RegKey := 'SOFTWARE\Microsoft\VisualStudio\14.0\VC\Runtimes\x86';
    if RegKeyExists(HKLM, RegKey) then
    begin
        Result := True;
    end;
end;

// 在安装前检查所有依赖
function InitializeSetup(): Boolean;
var
    ErrorMsg: String;
    MissingDependencies: Boolean;
begin
    Result := True;
    MissingDependencies := False;
    ErrorMsg := '请安装以下缺失的组件：' + #13#10#13#10;
    
    if not IsNetFramework48Installed() then
    begin
        ErrorMsg := ErrorMsg + '- .NET Framework 4.8' + #13#10;
        MissingDependencies := True;
    end;
    
    if not IsWebView2Installed() then
    begin
        ErrorMsg := ErrorMsg + '- WebView2 Runtime' + #13#10;
        MissingDependencies := True;
    end;
    
    if not IsVCRedistInstalled() then
    begin
        ErrorMsg := ErrorMsg + '- Visual C++ Runtime' + #13#10;
        MissingDependencies := True;
    end;
    
    if MissingDependencies then
    begin
        ErrorMsg := ErrorMsg + #13#10 + '是否继续安装？';
        if MsgBox(ErrorMsg, mbConfirmation, MB_YESNO) = IDNO then
        begin
            Result := False;
        end;
    end;
end;