VC制作具有声音效果的动画桌面精灵

   你想制作出一个在桌面上透明显示，动态唱歌的桌面小精灵么？下面我来用我原来做的一个例子来教你如何来实现它。例子运行界面如下：

基本思路： 采用透明位图方法在桌面上显示位图，定时更换位图以实现动画效果，再采用播放内部WAV资源文件方法来播放自带WAV文件既可(右键可关闭此程序)。

具体实现步骤如下：

1、 在新建的工程文件中(VC6.0)中导入一WAV文件，取名”WEST”，再导入两幅位图取名”WEST1″和”WEST2″　。

2、 新建一.h文件，取名TransparentWnd.h

代码内容如下：

#if !defined(AFX_TRANSPARENTWND_H__6508F000_5685_11D3_9001_CBBD225E6BC4__INCLUDED_)
#define AFX_TRANSPARENTWND_H__6508F000_5685_11D3_9001_CBBD225E6BC4__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
// TransparentWnd.h : header file
//
//////////////////////////////////////
//作者： 徐景周. 2000.12
//功能：透明位图及WAV资源播放
//////////////////////////////////////
// TransparentWnd window

class TransparentWnd : public CWnd
{
// Construction
public:
TransparentWnd();

void CreateTransparent(LPCTSTR pTitle, RECT &rect);
void SetupRegion(CDC *pDC);
void DoChange(void);
void SoundPlay(void);

CBitmap m_bmpDraw;
int m_iAniSeq;

// Attributes
public:

// Operations
public:

// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(TransparentWnd)
//}}AFX_VIRTUAL

// Implementation
public:
virtual ~TransparentWnd();

// Generated message map functions
protected:
//{{AFX_MSG(TransparentWnd)
afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct);
afx_msg BOOL OnEraseBkgnd(CDC* pDC);
afx_msg void OnTimer(UINT nIDEvent);
afx_msg void OnRButtonDown(UINT nFlags, CPoint point);
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};

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

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

#endif // !defined(AFX_TRANSPARENTWND_H__6508F000_5685_11D3_9001_CBBD225E6BC4__INCLUDED_)


3、新建一.cpp文件，取名：TransparentWnd.cpp

代码内容如下：

// TransparentWnd.cpp : implementation file
//////////////////////////////////////
//作者： 徐景周. 2000.12
//功能：透明位图及WAV资源播放
//////////////////////////////////////
#include “stdafx.h”
#include “West.h”
#include “TransparentWnd.h”
#include “WestDlg.h”

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

/////////////////////////////////////////////////////////////////////////////
// TransparentWnd

TransparentWnd::TransparentWnd()
{
m_iAniSeq=0; //图像变化初始值
}

TransparentWnd::~TransparentWnd()
{
}

BEGIN_MESSAGE_MAP(TransparentWnd, CWnd)
//{{AFX_MSG_MAP(TransparentWnd)
ON_WM_LBUTTONDOWN()
ON_WM_CREATE()
ON_WM_ERASEBKGND()
ON_WM_TIMER()
ON_WM_RBUTTONDOWN()
ON_COMMAND(IDR_HELP, OnHelp)
ON_COMMAND(IDR_EXIT, OnExit)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

//********************************************************************************
//* CreateTransparent()
//*
//* Creates the main application window transparent
//********************************************************************************
void TransparentWnd::CreateTransparent(LPCTSTR pTitle, RECT &rect)
{
// 创建一个隐藏窗口
CreateEx( 0,
AfxRegisterWndClass(0,AfxGetApp()->LoadStandardCursor(IDC_ARROW)),
pTitle,
WS_POPUP ,
rect,
NULL,
NULL,
NULL);
DoChange();
}

//********************************************************************************
//* SetupRegion()
//*
//* Set the Window Region for transparancy outside the mask region
//********************************************************************************
void TransparentWnd::SetupRegion(CDC *pDC)
{
CDC memDC;
CBitmap &cBitmap=m_bmpDraw;
CBitmap* pOldMemBmp = NULL;
COLORREF col,colMask;
CRect cRect;
int x, y;
CRgn wndRgn, rgnTemp;

GetWindowRect(&cRect);
CPoint ptOrg=cRect.TopLeft();

BITMAP bmInfo;
cBitmap.GetObject(sizeof(bmInfo),&bmInfo);
CRect rcNewWnd=CRect(ptOrg,CSize(bmInfo.bmWidth,bmInfo.bmHeight));

memDC.CreateCompatibleDC(pDC);
pOldMemBmp = memDC.SelectObject(&cBitmap);
colMask=memDC.GetPixel(0,0);

wndRgn.CreateRectRgn(0, 0, rcNewWnd.Width(), rcNewWnd.Height());
for(x=0; x<=rcNewWnd.Width(); x++)
{
for(y=0; y<=rcNewWnd.Height(); y++)
{
col = memDC.GetPixel(x, y);
if(col == colMask)
{
rgnTemp.CreateRectRgn(x, y, x+1, y+1);
wndRgn.CombineRgn(&wndRgn, &rgnTemp, RGN_XOR);
rgnTemp.DeleteObject();
}
}
}
if (pOldMemBmp) memDC.SelectObject(pOldMemBmp);
SetWindowRgn((HRGN)wndRgn, TRUE);
MoveWindow(rcNewWnd);
}

void TransparentWnd::DoChange(void)
{
char szBmp[20];

//不断替换图像
sprintf(szBmp,”WEST%d”,m_iAniSeq%2+1);

m_bmpDraw.DeleteObject();
m_bmpDraw.LoadBitmap(szBmp);
CWindowDC dc(this);
SetupRegion(&dc);
Invalidate();


}

void TransparentWnd::SoundPlay(void)
{
//先关闭原声音播放
PlaySound(“WEST”,AfxGetResourceHandle(),SND_RESOURCE|SND_PURGE|SND_NODEFAULT );
SetTimer(2,61080,NULL); //设置播放声音时间61.08秒
//资源WAV文件的ID须加双引号，用下API函数播放
PlaySound(“WEST”,AfxGetResourceHandle(),SND_RESOURCE|SND_ASYNC|SND_NODEFAULT );
}

void TransparentWnd::OnLButtonDown(UINT nFlags, CPoint point)
{

CWnd::OnLButtonDown(nFlags, point);

//实现无标题拖动
PostMessage(WM_NCLBUTTONDOWN, HTCAPTION, MAKELPARAM(point.x,point.y));
}

int TransparentWnd::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CWnd::OnCreate(lpCreateStruct) == -1)
return -1;

SetTimer(1,1000,NULL); //开始时的图像显示时间
SetTimer(2,500,NULL); //启动声音播放计时器

SetWindowPos(&wndTopMost,0,0,0,0,SWP_NOSIZE|SWP_NOMOVE); //窗体总在总前面
return 0;
}

BOOL TransparentWnd::OnEraseBkgnd(CDC* pDC)
{
CRect rect;
GetWindowRect(&rect);

CDC memDC;
CBitmap &cBitmap=m_bmpDraw;;
CBitmap* pOldMemBmp = NULL;
CFont* pOldMemFont=NULL;

memDC.CreateCompatibleDC(pDC);
pOldMemBmp = memDC.SelectObject(&cBitmap);
pDC->BitBlt(0, 0, rect.Width(), rect.Height(), &memDC, 0, 0, SRCCOPY);

if (pOldMemBmp) memDC.SelectObject( pOldMemBmp );

return TRUE;
// return CWnd::OnEraseBkgnd(pDC);
}

void TransparentWnd::OnTimer(UINT nIDEvent)
{
switch(nIDEvent)
{
case(1)://变换图像
DoChange();
break;
case(2): //播放声音
SoundPlay();
break;
default:
break;
}
m_iAniSeq++;
if(m_iAniSeq==2)
m_iAniSeq=0;

CWnd::OnTimer(nIDEvent);
}

void TransparentWnd::OnRButtonDown(UINT nFlags, CPoint point)
{

CWnd::OnRButtonDown(nFlags, point);

DestroyWindow(); //鼠标右键点击时关闭此程序
}

4、在应用类(West.cpp)代码中初始化实例涵数改为下面既可：

　　 BOOL CWest::InitInstance()
{
srand(time(NULL));

//一次只运行一个程序实例，如果已运行则退出
if( FindWindow(NULL,”大话西游经典系列之–情感天地”)) exit(0);

TransparentWnd* pFrame = new TransparentWnd;
m_pMainWnd = pFrame;

// create and load the frame with its resources
CRect rect(0, 0, 100, 100);
pFrame->CreateTransparent(“大话西游经典系列之–情感天地”, rect);//IDB_MASK, IDB_BACK);
pFrame->CenterWindow(); //初始显示窗体位置
pFrame->ShowWindow(SW_SHOW);

return TRUE;
}

仔细查看，~o~