Hi there! I,ve already write code in VC++ with the CodeGear 2009 platform. But Lucky me they asked me to write it again with classes! So i tryed and here is the problem..... Find1.h Code: #ifndef Find_H #define Find_H #include <iostream> using namespace std; #include <stdio.h> #include <stdlib.h> class Find { public: void editbox(AnsiString); private: };//end of find class #endif Find1.cpp Code: #include <iostream> using namespace std; #include "Find1.h" #include "Unit1.h" void editbox(AnsiString edit) { edit = Form1->Edit1->Text; Form1->Label1->Caption = edit; } main.cpp #include <iostream> #include <stdlib> #include "Find1.h" #include "Unit1.h" void main () { Form1->Show(); } Unit1.cpp // this is the cpp file of my form Code: #include <vcl.h> #include <iostream> using namespace std; #include <fstream> #pragma hdrstop #include "Unit1.h" #include "Find1.h" //--------------------------------------------------------------------------- #pragma package(smart_init) #pragma resource "*.dfm" TForm1 *Form1; //--------------------------------------------------------------------------- __fastcall TForm1::TForm1(TComponent* Owner) : TForm(Owner) { } //--------------------------------------------------------------------------- void __fastcall TForm1::Button1Click(TObject *Sender) { AnsiString name; name = "George"; Find *find; [COLOR=Black]find = new Find;[/COLOR] //line 1 find->editbox(Form1->Edit1->Text) //problem line } So if i run it till line 1 it links well and i can run the programm if i run it with the problem line i take this: [ILINK32 Error] Error: Unresolved external 'Find::editbox(System::AnsiStringT<0>)' referenced from C:\USERS\GEORGE\DESKTOP\PROJECTS\CLASS TEST\DEBUG\UNIT1.OBJ any idias........ Thanks for you're help!
Editbox() is declared as a member of class Find. Your implementation of editbox() doesn't show that it is part of the Find class. Add this (in red): Code: #include <iostream> using namespace std; #include "Find1.h" #include "Unit1.h" void [COLOR="Red"]Find::[/COLOR]editbox(AnsiString edit) { edit = Form1->Edit1->Text; Form1->Label1->Caption = edit; }