function hi_32 hi_sdk_Init():THandle;stdcall;external'HISDK.dll';
错误是 Function needs result typehi_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
错误是 Function needs result typehi_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
function hi_32 hi_sdk_Init():Cardinal;stdcall;external'HISDK.dll';
TForm1 = class(TForm)
Button1: TButton;
Image1: TImage;
GroupBox1: TGroupBox;
procedure Button1Click(Sender: TObject); private
{ Private declarations }
public
{ Public declarations }
end;
function hi_sdk_Init(husb:THandle):Integer;stdcall;external'HISDK.dll';
var
Form1: TForm1;
sdk_Init:THandle;implementation{$R *.dfm}procedure TForm1.Button1Click(Sender: TObject);
begin
sdk_Init:=hi_sdk_Init();
end;end.
sdk_Init:=hi_sdk_Init();错误Not enough actual parameters 要怎么写啊 这个sdk给的不是很详细 第一次写不太会 谢谢
function hi_sdk_Init(husb:THandle):Integer;stdcall;external'HISDK.dll';那么调用的时候应该这样:
procedure TForm1.Button1Click(Sender: TObject);
var
h: THandle;
begin
sdk_Init := hi_sdk_Init(h);
end;
TForm1 = class(TForm)
Button1: TButton;
Image1: TImage;
GroupBox1: TGroupBox;
procedure Button1Click(Sender: TObject); private
{ Private declarations }
public
{ Public declarations }
end;
function hi_sdk_Init(var husb: THandle): Integer; stdcall; external'HISDK.dll'; //<--注意这里,添加一个var标识
var
Form1: TForm1;
sdk_Init:THandle;implementation{$R *.dfm}procedure TForm1.Button1Click(Sender: TObject);
begin
hi_sdk_Init(sdk_Init); //<--注意这里,这样调用
end;end.