终于开始安心研究vc了，首先一直困扰我是关于vc里万恶的CButton类，一点美化的功能都没，想改个颜色字体什么的还要自己写代码，羡慕自己在弄vb的时候啊，呵呵。不过自己这两天的探索，也算学会了不少啊。下面是自己封装的button类，有改按钮文字的前景色，背景色，字体以及按钮本身的背景色和背景图片。
bb.h：
#if !defined(AFX_BB_H__E2D72529_DDA6_4CB2_B212_AB7319736D8E__INCLUDED_)
#define AFX_BB_H__E2D72529_DDA6_4CB2_B212_AB7319736D8E__INCLUDED_
#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
// bb.h : header file
//
/////////////////////////////////////////////////////////////////////////////
// bb window
class bb : public CButton
{
// Construction
public:
bb();
// Attributes
public:
void settextcolor(COLORREF);
void settextbkcolor(COLORREF);
void setbkcolor(COLORREF);
void setimage(char *i);
void setbkmode(int m);
void setfont(int f1,char *f2);
// Operations
public:
// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(bb)
public:
virtual void DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct);
//}}AFX_VIRTUAL
// Implementation
public:
virtual ~bb();
// Generated message map functions
protected:
//{{AFX_MSG(bb)
afx_msg void OnPaint();
//}}AFX_MSG
COLORREF textcolor;
COLORREF textbkcolor;
COLORREF bkcolor;
char *image;
int bkmode;
HBITMAP m_hBitmap;
CFont *f;
DECLARE_MESSAGE_MAP()
};
/////////////////////////////////////////////////////////////////////////////
//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.
#endif // !defined(AFX_BB_H__E2D72529_DDA6_4CB2_B212_AB7319736D8E__INCLUDED_)
bb.cpp：
// bb.cpp : implementation file
//
#include "stdafx.h"
#include "1.h"
#include "bb.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// bb
bb::bb()
{
textbkcolor=::GetSysColor(COLOR_3DFACE);
textcolor=RGB(220,0,0);
bkcolor=::GetSysColor(COLOR_3DFACE);
bkmode=1;
image=0;
f=new CFont;
}
bb::~bb()
{
delete []image;
f->DeleteObject();
}
BEGIN_MESSAGE_MAP(bb, CButton)
//{{AFX_MSG_MAP(bb)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// bb message handlers
void bb::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
CDC dc;
CRect rect;
dc.Attach(lpDrawItemStruct ->hDC); // Get the Button DC to CDC
rect=lpDrawItemStruct->rcItem;
rect = lpDrawItemStruct->rcItem; //Store the Button rect to our local rect.
rect = lpDrawItemStruct -> rcItem;
CBitmap m_Bitmap;
CDC dcMem;
BITMAP s_Bmp;
if(image){
m_Bitmap.Attach(m_hBitmap);
dcMem.CreateCompatibleDC(&dc); // 创建于内存设备环境相兼容的设备环境
dcMem.SelectObject(&m_Bitmap);
// 将位图对象选入到内存设备环境中
m_Bitmap.GetBitmap(&s_Bmp); // 获取位图信息
dc.StretchBlt(rect.left,rect.top,rect.Width(),rect.Height(),
&dcMem,0,0,s_Bmp.bmWidth,s_Bmp.bmHeight,SRCCOPY);
}else{
//dc.Draw3dRect(&rect,RGB(2,25,25),RGB(10,0,10));
dc.FillSolidRect(&rect,bkcolor);//Here you can define the required color to appear on the Button.
}
UINT state=lpDrawItemStruct->itemState; //This defines the state of the Push button either pressed or not.
if((state & ODS_SELECTED))
{
dc.DrawEdge(&rect,EDGE_SUNKEN,BF_RECT);
}
else
{
dc.DrawEdge(&rect,EDGE_RAISED,BF_RECT);
}
dc.SetBkMode(TRANSPARENT);
dc.SetBkColor(textbkcolor); //Setting the Text Background color
dc.SetTextColor(textcolor); //Setting the Text Color
TCHAR buffer[MAX_PATH]; //To store the Caption of the button.
ZeroMemory(buffer,MAX_PATH ); //Intializing the buffer to zero
::GetWindowText(lpDrawItemStruct->hwndItem,buffer,MAX_PATH); //Get the Caption of Button Window
dc.DrawText(buffer,&rect,DT_CENTER|DT_VCENTER|DT_SINGLELINE);//Redraw the Caption of Button Window
dc.Detach(); // Detach the Button DC
}
void bb::settextcolor(COLORREF a){
this->textcolor=a;
this->Invalidate();
}
void bb::settextbkcolor(COLORREF a){
this->textbkcolor=a;
this->Invalidate();
}
void bb::setbkcolor(COLORREF a){
this->bkcolor=a;
delete[] image;
image=0;
this->Invalidate();
}
void bb::setbkmode(int a){
this->bkmode=a;
this->Invalidate();
}
void bb::setimage(char *i){
delete[] image;
image=new char[strlen(i)+1];
::strcpy(image,i);
m_hBitmap=(HBITMAP)::LoadImage(NULL,_T(image),IMAGE_BITMAP,0,0,LR_LOADFROMFILE|LR_CREATEDIBSECTION);
this->Invalidate();
}
void bb::setfont(int f2,char *f1){
if(f){
delete f;
}
f=new CFont;
f->CreatePointFont(f2,f1);
this->SetFont(f);
this->Invalidate();
}
关键是对于按钮的重绘，要重载drawitem函数，还要将button设为所有者绘制。其他的都是对于DC的用法，平时多联系就能掌握了。给出个例子：
void CMy1Dlg::OnButton1()
{
m.setfont(900,"黑体");
m.setbkcolor(RGB(166,166,66));
}
void CMy1Dlg::OnButton3()
{
m.setimage("C://Inetpub//wwwroot//三下乡//else//logo.bmp");
m.setfont(400,"隶书");
}
m为bb对象，设置图片只能为bmp格式的。
好了，文章写到这里，有什么不足之处还望大家多多指正。