桌面精灵

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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);

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;

}

其中具体实现细节，请在下载实例代码后仔细查看，~o~