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CppBuilderVclUnit1H

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(C++ Builder) Unit1.h (VCL)

By default at start-up this is:

//---------------------------------------------------------------------------
ifndef Unit1H

define Unit1H

//---------------------------------------------------------------------------
include <Classes.hpp>

include <Controls.hpp>

include <StdCtrls.hpp>

include <Forms.hpp>

//---------------------------------------------------------------------------
class TForm1 : public TForm
{
__published:	// IDE-managed Components
private:	// User declarations
public:		// User declarations
  __fastcall TForm1(TComponent* Owner);
};
//---------------------------------------------------------------------------
extern PACKAGE TForm1 *Form1;
//---------------------------------------------------------------------------
endif

The first thing you can notice is the use an #include guard:

ifndef Unit1H

define Unit1H

//Rest of code
endif

After it, some usefull header files are #included.

Then the class TForm1 is declared, which inherits publicly from TForm:

class TForm1 : public TForm

The class's internals have __published, private and public access rights. The __published section is managed by C++ Builder itself. Don't touch, unless you know what you're doing. The other sections can have functions and variables added. There already is one function declared: the constructor of TForm1:

__published:	// IDE-managed Components
private:	// User declarations
public:		// User declarations
  __fastcall TForm1(TComponent* Owner); //Constructor

The last unknown line declares a global pointer to TForm1 called Form1. It is extern, so it can be used in multiple Units.

extern PACKAGE TForm1 *Form1;

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