CDib::CObject debug error?

I am a newbie learnning vc++6.0,and now I read one book
about graph process with vc++6.0,
first lesson told me must design one class CDib from CObject,
so that we can process bmp which colors>256,
this is Dib.h from my book:
//--------------------

#ifndef __CDIB_H
#define __CDIB_H

class CDib:public CObject
{
public:
RGBQUAD * m_pRGB;
BYTE * m_pData;
UINT m_numberOfColors;
BOOL m_valid;
BITMAPFILEHEADER bitmapFileHeader;
BITMAPINFOHEADER * m_pBitmapInfoHeader;
BITMAPINFO * m_pBitmapInfo;
BYTE * pDib;
DWORD size;

public:
CDib();
~CDib();
char m_fileName[256];
char *GetFileName();
BOOL IsValid();
DWORD GetSize();
UINT GetWidth();
UINT GetHeight();
UINT GetNumberOfColors();
RGBQUAD *GetRGB();
BYTE *GetData();
BITMAPINFO *GetInfo();
WORD PaletteSize(LPBYTE lpDIB);
WORD DIBNumColors(LPBYTE lpDIB);
void SaveFile(const CString filename);

public:
void LoadFile(const char *dibFileName);
};

#endif
//-------------------------

this is Dib.cpp:
//-------------------------

#include "stdafx.h"
#include "Dib.h"
#include "windowsx.h"

CDib::CDib()
{
size=0;
}
CDib::~CDib()
{
GlobalFreePtr(m_pBitmapInfo);
}
void CDib::LoadFile(const char * dibFileName)
{
strcpy(m_fileName,dibFileName);
CFile dibFile(m_fileName,CFile::modeRead);
dibFile.Read((void *)&bitmapFileHeader,sizeof(BITMAPFILEHEADER));
if(bitmapFileHeader.bfType==0x4d42)
{
DWORD fileLength=dibFile.GetLength();
size=fileLength-sizeof(BITMAPFILEHEADER);
pDib=(BYTE*)GlobalAllocPtr(GMEM_MOVEABLE,size);
dibFile.Read((void *)pDib,size);
dibFile.Close();
m_pBitmapInfo=(BITMAPINFO*)pDib;
m_pBitmapInfoHeader=(BITMAPINFOHEADER*)pDib;
m_pRGB=(RGBQUAD*)(pDib+m_pBitmapInfoHeader->biSize);
int m_numberOfColors=GetNumberOfColors();
if(m_pBitmapInfoHeader->biClrUsed==0)
m_pBitmapInfoHeader->biClrUsed=m_numberOfColors;
DWORD colorTableSize=m_numberOfColors* sizeof(RGBQUAD);
m_pData=pDib+m_pBitmapInfoHeader->biSize+colorTableSize;
if(m_pRGB==(RGBQUAD*)m_pData) //No Color table
m_pRGB=NULL;
m_pBitmapInfoHeader->biSizeImage=GetSize();
m_valid=TRUE;
}
else
{
m_valid=FALSE;
AfxMessageBox("This isn't a bitmap file!");
}
}
BOOL CDib::IsValid()
{
return m_valid;
}
char * CDib::GetFileName()
{
return m_fileName;
}
UINT CDib::GetWidth()
{
return (UINT) m_pBitmapInfoHeader->biWidth;
}
UINT CDib::GetHeight()
{
return (UINT) m_pBitmapInfoHeader->biHeight;
}
DWORD CDib::GetSize()
{
if(m_pBitmapInfoHeader->biSizeImage!=0)
return m_pBitmapInfoHeader->biSizeImage;
else
{
DWORD height=(DWORD)GetHeight();
DWORD width=(DWORD)GetWidth();
return height * width;
}
}
UINT CDib::GetNumberOfColors()
{
int numberOfColors;
if((m_pBitmapInfoHeader->biClrUsed==0)&&
(m_pBitmapInfoHeader->biBitCount<9))
{
switch(m_pBitmapInfoHeader->biBitCount)
{
case 1:
numberOfColors=2;
break;
case 4:
numberOfColors=16;
break;
case 8:
numberOfColors=256;
}
}
else
numberOfColors=(int)m_pBitmapInfoHeader->biClrUsed;
return numberOfColors;
}
BYTE *CDib::GetData()
{
return m_pData;
}
RGBQUAD* CDib::GetRGB()
{
return m_pRGB;
}
BITMAPINFO * CDib::GetInfo()
{
return m_pBitmapInfo;
}
WORD CDib::PaletteSize(LPBYTE lpDIB)
{
return (DIBNumColors(lpDIB)*sizeof(RGBTRIPLE));
}
WORD CDib::DIBNumColors(LPBYTE lpDIB)
{
WORD wBitCount; //DIB bit count
wBitCount=((LPBITMAPCOREHEADER)lpDIB)->bcBitCount;
switch(wBitCount)
{
case 1:
return 2;
case 4:
return 16;
case 8:
return 256;
default:
return 0;
}
}
void CDib::SaveFile(const CString filename)
{
strcpy(m_fileName,filename);
CFile dibFile(m_fileName,CFile::modeCreate|CFile::modeWr ite);
dibFile.Write((void*)&bitmapFileHeader,sizeof(BITM APFILEHEADER));
dibFile.Write((void*)pDib,size);
dibFile.Close();
}
//----------------------------

I have complie dib.h and dib.cpp into dll and lib file,
then I begin use CDib class into my first example prog in book,
DYNSPLIT work to display one source bmp and edited bmp in
a split window,
this is dynsplitview.h:


// dynsplitView.h : interface of the CDynsplitView class
//
/////////////////////////////////////////////////////////////////////////////

#if !defined(AFX_DYNSPLITVIEW_H__639DBA56_CE12_469D_AC F2_42F3256E01C0__INCLUDED_)
#define AFX_DYNSPLITVIEW_H__639DBA56_CE12_469D_ACF2_42F325 6E01C0__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000


class CDynsplitView : public CView
{
protected: // create from serialization only
CDynsplitView();
DECLARE_DYNCREATE(CDynsplitView)

// Attributes
public:
CDynsplitDoc* GetDocument();

// Operations
public:

// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CDynsplitView)
public:
virtual void OnDraw(CDC* pDC); // overridden to draw this view
virtual BOOL PreCreateWindow(CREATESTRUCT& cs);
protected:
virtual BOOL OnPreparePrinting(CPrintInfo* pInfo);
virtual void OnBeginPrinting(CDC* pDC, CPrintInfo* pInfo);
virtual void OnEndPrinting(CDC* pDC, CPrintInfo* pInfo);
//}}AFX_VIRTUAL

// Implementation
public:
CPalette * hPalette;
CPalette CreateBitmapPalette(CDib *pBitmap);
virtual ~CDynsplitView();
#ifdef _DEBUG
virtual void AssertValid() const;
virtual void Dump(CDumpContext& dc) const;
#endif

protected:

// Generated message map functions
protected:
//{{AFX_MSG(CDynsplitView)
// NOTE - the ClassWizard will add and remove member functions here.
// DO NOT EDIT what you see in these blocks of generated code !
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};

#ifndef _DEBUG // debug version in dynsplitView.cpp
inline CDynsplitDoc* CDynsplitView::GetDocument()
{ return (CDynsplitDoc*)m_pDocument; }
#endif

/////////////////////////////////////////////////////////////////////////////

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_DYNSPLITVIEW_H__639DBA56_CE12_469D_AC F2_42F3256E01C0__INCLUDED_)
//--------------------------------

THIS IS DYNSPLITVIEW.CPP:

// dynsplitView.cpp : implementation of the CDynsplitView class
//

#include "stdafx.h"
#include "dib.h"
#include "dynsplit.h"
#include "dynsplitDoc.h"
#include "dynsplitView.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CDynsplitView

IMPLEMENT_DYNCREATE(CDynsplitView, CView)

BEGIN_MESSAGE_MAP(CDynsplitView, CView)
//{{AFX_MSG_MAP(CDynsplitView)
// NOTE - the ClassWizard will add and remove mapping macros here.
// DO NOT EDIT what you see in these blocks of generated code!
//}}AFX_MSG_MAP
// Standard printing commands
ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CDynsplitView construction/destruction

CDynsplitView::CDynsplitView()
{
// TODO: add construction code here

}

CDynsplitView::~CDynsplitView()
{
}

BOOL CDynsplitView::PreCreateWindow(CREATESTRUCT& cs)
{
// TODO: Modify the Window class or styles here by modifying
// the CREATESTRUCT cs

return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CDynsplitView drawing

void CDynsplitView::OnDraw(CDC* pDC)
{
CDynsplitDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
// TODO: add draw code for native data here
int m_scale=1;
BYTE * pBitmapData=CDib->GetData();
LPBITMAPINFO pBitmapInfo=CDib->GetInfo();
int bitmapHeight=CDib->GetHeight();
int bitmapWidth=CDib->GetWidth();
int scaledWidth=(int)(bitmapWidth * m_scale);
int scaledHeight=(int)(bitmapHeight * m_scale);
if(CDib->GetRGB())
{
CPalette * hPalette=CreateBitmapPalette(CDib);
CPalette * hOldPalette=pDC->SelectPalette(hPalette,true);
pDC->RealizePalette();
::StretchDIBits(pDC->GetSafeHdc(),0,0,scaledWidth,
scaledHeight,
0,0,bitmapWidth,bitmapHeight,pBitmapData,pBitmapIn fo,
DIB_RGB_COLORS,SRCCOPY);
pDC->SelectPalette(hOldPalette,true);
::DeleteObject(hPalette);
}
}


/////////////////////////////////////////////////////////////////////////////
// CDynsplitView printing

BOOL CDynsplitView::OnPreparePrinting(CPrintInfo* pInfo)
{
// default preparation
return DoPreparePrinting(pInfo);
}

void CDynsplitView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
// TODO: add extra initialization before printing
}

void CDynsplitView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
// TODO: add cleanup after printing
}

/////////////////////////////////////////////////////////////////////////////
// CDynsplitView diagnostics

#ifdef _DEBUG
void CDynsplitView::AssertValid() const
{
CView::AssertValid();
}

void CDynsplitView::Dump(CDumpContext& dc) const
{
CView::Dump(dc);
}

CDynsplitDoc* CDynsplitView::GetDocument() // non-debug version is inline
{
ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CDynsplitDoc)));
return (CDynsplitDoc*)m_pDocument;
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CDynsplitView message handlers

CPalette CDynsplitView::CreateBitmapPalette(CDib *pBitmap)
{
struct
{
WORD Version;
WORD NumberOfEntries;
PALETTEENTRY aEntries[256];
}palette={0x300,256};
LPRGBQUAD pRGBTable=pBitmap->GetRGB();
UINT numberOfColors=pBitmap->GetNumberOfColors();
for(UINT x=0;x<numberOfColors;++x)
{
palette.aEntries[x].peRed=pRGBTable[x].rgbRed;
palette.aEntries[x].peGreen=pRGBTable[x].rgbGreen;
palette.aEntries[x].peBlue=pRGBTable[x].rgbBlue;
palette.aEntries[x].peFlags=0;
}
hPalette.CreatePalette((LPLOGPALETTE)&palette);
return &hPalette;
}

THIS IS ERROR MESSAGE:

Compiling...
dynsplitView.cpp
E:\dynsplit\dynsplitView.cpp(63) : error C2819: type 'CDib' does not have an overloaded member 'operator ->'
e:\dynsplit\dib.h(4) : see declaration of 'CDib'
E:\dynsplit\dynsplitView.cpp(63) : error C2227: left of '->GetData' must point to class/struct/union
E:\dynsplit\dynsplitView.cpp(64) : error C2819: type 'CDib' does not have an overloaded member 'operator ->'
e:\dynsplit\dib.h(4) : see declaration of 'CDib'
E:\dynsplit\dynsplitView.cpp(64) : error C2227: left of '->GetInfo' must point to class/struct/union
E:\dynsplit\dynsplitView.cpp(65) : error C2819: type 'CDib' does not have an overloaded member 'operator ->'
e:\dynsplit\dib.h(4) : see declaration of 'CDib'
E:\dynsplit\dynsplitView.cpp(65) : error C2227: left of '->GetHeight' must point to class/struct/union
E:\dynsplit\dynsplitView.cpp(66) : error C2819: type 'CDib' does not have an overloaded member 'operator ->'
e:\dynsplit\dib.h(4) : see declaration of 'CDib'
E:\dynsplit\dynsplitView.cpp(66) : error C2227: left of '->GetWidth' must point to class/struct/union
E:\dynsplit\dynsplitView.cpp(69) : error C2143: syntax error : missing ')' before '->'
E:\dynsplit\dynsplitView.cpp(69) : error C2143: syntax error : missing ';' before '->'
E:\dynsplit\dynsplitView.cpp(69) : error C2059: syntax error : ')'
E:\dynsplit\dynsplitView.cpp(70) : error C2143: syntax error : missing ';' before '{'
E:\dynsplit\dynsplitView.cpp(71) : error C2275: 'CDib' : illegal use of this type as an expression
e:\dynsplit\dib.h(4) : see declaration of 'CDib'
E:\dynsplit\dynsplitView.cpp(144) : error C2228: left of '.CreatePalette' must have class/struct/union type
E:\dynsplit\dynsplitView.cpp(145) : error C2660: 'CPalette::CPalette' : function does not take 1 parameters
Error executing cl.exe.

PLEASE GIVE ME SOME GUIDE :
How to correct this error:

E:\dynsplit\dynsplitView.cpp(63) : error C2819: type 'CDib' does not have an overloaded member 'operator ->'
e:\dynsplit\dib.h(4) : see declaration of 'CDib'

THANKS!

Quote:

---

PLEASE GIVE ME SOME GUIDE :

---

What good would it do? Seriously. We already have forum guides, which you didn't read, or if you did, which I highly doubt, you ignored them. So how about you read the Announcements, find out what's wrong with your post, correct it by editing it, and try again.

Quzah.

sorry,if I post error place or message,because I have wasted almost one month to find the answer,
I donnt need guide, just give small help about this error:

type 'CDib' does not have an overloaded member 'operator ->'

this is source prog : BYTE * pBitmapData=CDib->GetData();

Quote:

---

sorry,if I post error place or message,because I have wasted almost one month to find the answer,
I donnt need guide, just give small help about this error:

---

And you still haven't read the Announcements...

Quzah.

yes,I have disobeied Announcements 11.
but DONNT PLAY WITH A NEWBIE JUST COMMING TO YOUR FORUM!!!

Why on earth would anyone help you when you blatantly disregard the forum rules? Someone lock this thread.

Quzah.

Some warmhearted vc++ gurus can help me ?

I love the smilies in the code. That always makes me want to read it.

I don't know how to help you but I have one thing to tell you.
Put your code in the code tags to make it alot easier to read.

As much as I hate myself for doing it, I think I found the problem. Did you ever instantiate a CDib object?

@TWIXMIX :
THANKS FOR YOUR HELPNESS! shake your hands.

@pianorain :
THANKS A LOT. Please forgive me putting so long words make you headache,haha..
but I dont see "instantiate a CDib object" what's mean?
How to instantiate CDib?
Please give me a simplesample,
see you.

Code:

---

CDib *objCDib;
objCDib = new CDib();

---

Take note of the code tags.

I cannot give you a satisfactory explanation of what is wrong; I can tell you that you need a CDib object somewhere in your CDynsplitView code. And probably a few other things too, after glancing at the error messages.

Seriously, you'd get a better response by editing your first post and putting in some code tags.

@pianorain :

Thanks,I will go back test it,
because I am a newbie ,before post this thread I hesitated a long time ,
I donn't know how to select sticking point (important parts),
at last I make this error decision.

@quzah :
Sorry for my disrespect action.