dll调用
function hi_32 hi_sdk_Init():THandle;stdcall;external'HISDK.dll';
错误是 Function needs result type

hi_32 hi_sdk_Init()是初始化函数
result values HI_success表示成功 HI_failure表示失败

要怎么写这个返回值
谢谢
[解决办法]
试试这样：

type
  TForm1 = class(TForm)
  Button1: TButton;
  Image1: TImage;
  GroupBox1: TGroupBox;
  procedure Button1Click(Sender: TObject);

  private
  { Private declarations }
  public
  { Public declarations }
  end;
  function hi_sdk_Init(var husb: THandle): Integer; stdcall; external'HISDK.dll'; //<--注意这里，添加一个var标识
var
  Form1: TForm1;
  sdk_Init:THandle;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
  hi_sdk_Init(sdk_Init); //<--注意这里，这样调用
end;

end.