c++builder动态调用dll
// 定义typedef int __stdcall MyFunction (int x, char *str);int rtn = 0;String dllName = "XXXX.dll";HINSTANCE hInstance = LoadLibrary(dllName.c_str());MyFunction * pMyFunction = (MyFunction*) GetProcAddress(hInstance, "rdcompany"); // 函数名称要正确if (pMyFunction == NULL){// 提示}rtn = pMyFunction(1, "aa");FreeLibrary(hInstance);hInstance = NULL;
C++builder的dll导出类
// Enable RTTI generation for private fields#pragma explicit_rtti fields(private) class __declspec(delphiclass) TBuffer {private: int wrHead, rdHead; // ...public: TBuffer() { }}; http://docwiki.embarcadero.com/RADStudio/Berlin/en/Delphi_RTTI_and_C++Builder
c++导出函数
extern "C" __declspec(dllexport) int __stdcall fun();
静态调用
extern "C" __declspec(dllimport) int __stdcall test();
根据dll生成lib文件
cmd命令后
implib E:\MYDEV\CRT_310.lib E:\MYDEV\CRT_310.dll
implib CRT_310.lib CRT_310.dll
调用的工程里添加lib文件或者#pragma link "CRT_310.lib"
这里HANDLE 是typedef void *HANDLE;
typedef HANDLE APIENTRY CommOpenWithBaut(char *Port, BYTE _BaudOption);
delphi静态调用dll
function Write_DF02(ucSFI: byte; wFileLen: Word; pucData: PByte): integer; stdcall external 'my.dll';
procedure Set_Path(pchPath: PAnsiChar); stdcall external 'my.dll';
const UrlMonLib = 'URLMON.DLL';function CreateURLMoniker; external UrlMonLib name 'CreateURLMoniker'; function readCardInfo_json():PAnsiChar;stdcall; external 'test.dll';
pansichar参数返回
name: array[0..50] of AnsiChar;
age:integer;
money:double;
fun(name,@age,@money);
fun(name,age,money);
用 name:TArray<AnsiChar>; 应该也可以。就是麻烦，定义和分配2行代码。
setlength(name,50);
二、delphi动态调用dll
//函数原型生命type Taddc = function: TStringList; stdcall; TGetCPUID = function(CPUID: PAnsiChar): integer; stdcall; //注1 // var hh: THandle; addc: Taddc; GetId: TGetCPUID; temp: TStringList; i: Integer; begin hh := LoadLibrary('DLL.dll'); try if hh = 0 then begin ShowMessage('load error'); exit; end; //装载方法 @addc := GetProcAddress(hh, PChar('testStr')); GetId := GetProcAddress(hh, pchar('GetCPUID')); //invoke GetId(1); if not (@addc = nil) then begin addc; end else begin RaiseLastWin32Error; end; finally FreeLibrary(hh); end;
delphi Berlin版本 如何给PAnsiChar赋值?
StrCopy(value, PAnsiChar(AnsiString(kvalue)));
因为是UnicodeString，所以必须先进行AnsiString转换。
#define DLLEXPORT_API extern "C" _declspec(dllexport)
dll函数导出 改名别名
delphi太简单了
procedure a(); stdcall;beginend;exports a name '@$xp$20Controls@TAnchorKind';
function InitCommExt(): Integer; stdcall;
c++builder找不到方法
http://toby.logdown.com/posts/220527/c-builder-define-dll-export-function-names-using-def-file
DetectCard(ComHandle: THANDLE; var CardType: Byte; var CardInfor: Byte): Integer; stdcall; external 'aa.dll';dll调用，引用地址var CardType: Byte; CardInfor: Byte; rec := DetectCard(CHandle, CardType, CardInfor);