用 C++ Builder 寫DLL及測試DLL代碼 (留記錄)

一、DLL入口聲明

 

extern  "C" __declspec(dllexport)  int __stdcall  fnDoFaceRecOut(char *fileFaceIni);

int __stdcall fnDoFaceRecOut(char *fileFaceIni)
{
   AnsiString filename =fileFaceIni;
   //....

   return 0;
}

 

二、測試 DLL代碼

 

 

void __fastcall TForm1::BitBtn2Click(TObject *Sender)
{
        HINSTANCE dd;
        typedef int _stdcall (*deffnDoFaceRecGenMap)(char *fileFaceIni);
        deffnDoFaceRecGenMap fnDoFaceRecGenMap;
        AnsiString CurrentDir =ExtractFilePath(ParamStr(0))+"FaceRecDll.dll";
        dd=::LoadLibrary(CurrentDir.c_str());
        AnsiString fileFaceIni= "";
        if (dd)
        {
        if (OpenDialog1->Execute())
        {
                fnDoFaceRecGenMap= (deffnDoFaceRecGenMap) GetProcAddress(dd,"fnDoFaceRecGenMap");
                if (fnDoFaceRecGenMap)
                {
                        lblMessage->Caption = "正在處理...";
                        Application-> ProcessMessages();

                        Caption=IntToStr(fnDoFaceRecGenMap(OpenDialog1->FileName.c_str()));
                        lblMessage->Caption = "處理完畢!";
                }
        }
        }        
}