Major DLL issues, symbols exported, but still unidentified.

[killdude69]

This problem has been bugging me for two days now.

I am trying to make a DLL, it exports many classes containing properties, variables, functions and a constructor.

I am using VC++ 2005 on Windows Vista Basic.

My project is the WGCL C++ control library. It is a mask for the WinAPI common controls. And since the files are so big, they all must be in their own header.

My goal is for the dll to be loaded with LoadLibrary only, no linker options, nothing else at all.

Which I know is possible because Scintilla does this.

Here is what I have:

WGCL2.cpp

#define WGCL_VERSION 0x0200

#include <windows.h>
#include <commctrl.h>

#define DLLEXPORT __declspec(dllexport)

#include "TextBox.h"

BOOL APIENTRY DllMain(HANDLE hModule, DWORD ul_reason_for_call, LPVOID lpReserved)
{
    return TRUE;
}

TextBox.h

#define WGCL_TEXTBOX

class DLLEXPORT TextBox
{
private:
    // Underlying Property Variables
	LPSTR _Text;
	HWND  _hwnd, _Parent;
	bool  _MultiLine;      // ReadOnly, after Set
	bool  _Visible;
	bool  _Enabled;
	bool  _ReadOnly;
	int   _x, _y;
	int   _width, _height;
	int   _ControlID;      // ReadOnly, after Set
public:
	// Underlying Property Get() & Set(val) Operations
	LPSTR Text_Get()
	{
		LPSTR buffer;
		buffer = (LPSTR)GlobalAlloc(GPTR, (GetWindowTextLength(hwnd) + 1));
	    GetWindowText(hwnd, buffer, (GetWindowTextLength(hwnd) + 1));
		return buffer;
	}
	void  Text_Set(LPSTR val)   { _Text = val; SetWindowText(hwnd, Text);           }
	HWND  hwnd_Get()            { return _hwnd;                                     }
	void  hwnd_Set(HWND val)    { _hwnd = val;                                      }
	HWND  Parent_Get()          { return _Parent;                                   }
	void  Parent_Set(HWND val)  { _Parent = val;                                    }
	bool  MultiLine_Get()       { return _MultiLine;                                }
	bool  Visible_Get()         { return _Visible;                                  }
	void  Visible_Set(bool val)
	{
		_Visible = val;
		if (val == true)
			ShowWindow(_hwnd, SW_SHOW);
		else
			ShowWindow(_hwnd, SW_HIDE);
	}
    bool  CanUndo_Get()          { return FromBOOL(Send(EM_CANUNDO, 0, 0));           }
	bool  ReadOnly_Get()         { return _ReadOnly;                                  }
	void  ReadOnly_Set(bool val) { if(Send(EM_SETREADONLY, val, 0)) _ReadOnly = val;  }
	bool  Enabled_Get()          { return _Enabled;                                   }
	void  Enabled_Set(bool val)  { if(EnableWindow(_hwnd, val)) _Enabled = val;       }
	int   X_Get()                { return _x;                                         }
	void  X_Set(int val)         { _x = val; Resize(_x, _y, _width, _height);         }
	int   Y_Get()                { return _y;                                         }
	void  Y_Set(int val)         { _y = val; Resize(_x, _y, _width, _height);         }
	int   Width_Get()            { return _width;                                     }
	void  Width_Set(int val)     { if(Resize(_x, _y, _width, _height)) _width = val;  }
	int   Height_Get()           { return _height;                                    }
	void  Height_Set(int val)    { if(Resize(_x, _y, _width, _height)) _height = val; }
	int   ControlID_Get()        { return _ControlID;                                 }
	int   TextLength_Get()       { return GetWindowTextLength(_hwnd);                 }

	// Constuctor
	TextBox::TextBox(LPSTR, HWND, bool, int, int, int, int, int);

    // Properties
    _declspec( property( get=Text_Get, put=Text_Set         ) ) LPSTR Text;
    _declspec( property( get=hwnd_Get                       ) ) HWND  hwnd;
	_declspec( property( get=Parent_Get, put=Parent_Set     ) ) HWND  Parent;
	_declspec( property( get=MultiLine_Get                  ) ) bool  MultiLine;
	_declspec( property( get=Visible_Get, put=Visible_Set   ) ) bool  Visible;
	_declspec( property( get=CanUndo_Get                    ) ) bool  CanUndo;
	_declspec( property( get=ReadOnly_Get, put=ReadOnly_Set ) ) bool  ReadOnly;
	_declspec( property( get=Enabled_Get, put=Enabled_Set   ) ) bool  Enabled;
	_declspec( property( get=ControlID_Get                  ) ) int   ControlID;
	_declspec( property( get=X_Get, put=X_Set               ) ) int   x;
	_declspec( property( get=Y_Get, put=Y_Set               ) ) int   y;
	_declspec( property( get=Width_Get, put=Width_Set       ) ) int   width;
	_declspec( property( get=Height_Get, put=Height_Set     ) ) int   height;
	_declspec( property( get=TextLength_Get                 ) ) int   TextLength;
    
	// Functions
	bool Create();
	bool Update();
    bool Destroy();

	bool FitToWindow();
	bool Resize(int, int, int, int);
	bool SetPos(HWND, int, int, int, int, UINT);

    void Undo();
	void Cut();
	void Copy();
	void Paste();
	void Delete();
    void Clear();

	LRESULT Send(UINT, WPARAM, LPARAM);
};

TextBox::TextBox(LPSTR text_, HWND parent_, bool multiline_, int x_, int y_, int width_, int height_, int controlid_)
{
    _Text      = text_;
    _Parent    = parent_;
	_x         = x_;
	_y         = y_;
	_width     = width_;
	_height    = height_;
	_ControlID = controlid_;

	_Enabled    = true;
	_ReadOnly   = false;
}

That is a little over half of the code of TextBox.h, now you see why they must be in different files.

When I use LoadLibrary to load the dll, the compiler says the symbols are loaded. But when I try to create an object with the TextBox class, it says "error C2065: 'TextBox' : undeclared identifier".

I know it is because the class is not exporting correctly. But what I don't know is how to import and export them correctly. I have searched all kinds of websites, from MSDN to CodeProject. And to no success.

How could I export the various functions, variables, constructors and enums from my DLL and import them into my application.

Thanks in advance. :)