try the external directive, see Delphi help for more details Vahan
-----Original Message----- From: [email protected] [mailto:[EMAIL PROTECTED] Behalf Of Tuan Le Sent: Wednesday, April 27, 2005 11:14 AM To: [email protected] Cc: [EMAIL PROTECTED] Subject: [delphi-en] How do I call a C++ DLL from Delphi Hi all, 1. I have created a dll in Visual C by wizard (File/New/Project/Win32 Dynamic-link Libary and select "A dll that exports some symbols") I built it and my dll is : dllsample.dll In this dll, there is a sample function DLLSAMPLE_API int fnDllsample(void) { return 42; } 2. I also create a project in delphi. DllHandle is always not NULL but @fnDllsample is null. It seems fnDllsample does not export but I can call this function DLL in visual c. Delphi can't Please help me, how to call it. Many thanks, Tuan (attached file : dllsample.zip) ------------------------------------------- My code is below: var fnDllsample: function(): integer; procedure TForm1.Button1Click(Sender: TObject); var i : integer; DLLHandle: THandle; begin DLLHandle := LoadLibrary('dllsample.dll'); if DLLHandle <> 0 then begin @fnDllsample := GetProcAddress(DLLHandle,'fnDllsample'); if @fnDllsample <> nil then begin i := fnDllsample; showmessage(inttostr(i)); end; end; end; end. [Non-text portions of this message have been removed] ----------------------------------------------------- Home page: http://groups.yahoo.com/group/delphi-en/ To unsubscribe: [EMAIL PROTECTED] ---------------------------------------------------------------------------- ---- Yahoo! Groups Links a.. To visit your group on the web, go to: http://groups.yahoo.com/group/delphi-en/ b.. To unsubscribe from this group, send an email to: [EMAIL PROTECTED] c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. [Non-text portions of this message have been removed] ----------------------------------------------------- Home page: http://groups.yahoo.com/group/delphi-en/ To unsubscribe: [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/delphi-en/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
