WinCE5.0下直接写屏操作与函数 CreateDIBSection() 的使用（转）

这段时间在研究直接写屏的方法.

此问题的起因是: 在 iMX31(WinCE 5.0)上, 屏的分辨为: 800*480. 调用 BitBlt() API 函数画一整屏的动作, 竟然需要 120ms 左右; 同样的程序, 在 Prima 上只需要 20ms 以内的时间. 

直接写屏, 需要用到以下两个主要的函数: CreateDC(TEXT("DISPLAY"),......) 和 CreateDIBSection().

1) CreateDC(TEXT("DISPLAY"),......) 的用法比较简单, 参考 MSDN 就可以很容易的搞定.

2) CreateDIBSection() API 函数的使用, 花了我一些时间. 因为以前没有用过它, 所以将其使用的方法记录如下:

{ 
HBITMAP hDIBitmap; 
LPBYTE lpBitmapBits; 
BITMAPINFO DriectBmp;  
ZeroMemory(&DriectBmp,sizeof(BITMAPINFO)); 
DriectBmp.bmiHeader.biSize=sizeof(BITMAPINFOHEADER); 
DriectBmp.bmiHeader.biWidth = 800; 
DriectBmp.bmiHeader.biHeight = 480; 
DriectBmp.bmiHeader.biPlanes = 1; 
DriectBmp.bmiHeader.biBitCount = 16; 
HDC dcDirect = CreateCompatibleDC(dcBuf); 
// 建立 hDIBitmap, dcDirect, 和 lpBitmapBits 之间的关系. 
// 通过 DC 操作向 dcDirect 中写入图形数据,  
//从 lpBitmapBits 中取得内存数据, 进行内存 Copy 操作, 直接写向显存. 
hDIBitmap = CreateDIBSection(dcDirect, (BITMAPINFO *)&DriectBmp,  
DIB_RGB_COLORS, (void **)&lpBitmapBits, NULL, 0); 
if(NULL != hDIBitmap) 
{ 
HGDIOBJ OldBitmap = SelectObject(dcDirect, hDIBitmap); 
BitBlt(dcDirect,0,0,800,480,dcBuf,0,0,SRCCOPY); 
CopyMemory(gpbFrameAddress,lpBitmapBits,800 * 480 * 2); 
SelectObject(dcDirect,OldBitmap); 
} 
 
DeleteObject(hDIBitmap); 
DeleteDC(dcDirect); 
} 

　　在研究此问题的过程中, 在 CSDN 上找到一个很好的资源, 也记录在自己这里:

http://topic.csdn.net/u/20090629/09/00b25d0d-d461-47dc-88ad-0e2131a5abc7.html

并转载其中关键的代码如下:

#include "stdafx.h" 
#include "CopyScreen.h" 
#include <windows.h> 
#include <commctrl.h> 
#include"Jpeg.h" 
#define MAX_LOADSTRING 100 
// 全局变量: 
HINSTANCEg_hInst;// 当前实例 
HWNDg_hWndMenuBar;// 菜单栏句柄 
// 此代码模块中包含的函数的前向声明: 
ATOMMyRegisterClass(HINSTANCE, LPTSTR); 
BOOLInitInstance(HINSTANCE, int); 
LRESULT CALLBACKWndProc(HWND, UINT, WPARAM, LPARAM); 
INT_PTR CALLBACKAbout(HWND, UINT, WPARAM, LPARAM); 
int WINAPI WinMain(HINSTANCE hInstance, 
   HINSTANCE hPrevInstance, 
   LPTSTRlpCmdLine, 
   int   nCmdShow) 
{ 
MSG msg; 
// 执行应用程序初始化: 
if (!InitInstance(hInstance, nCmdShow))  
{ 
return FALSE; 
} 
HACCEL hAccelTable; 
hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_COPYSCREEN)); 
// 主消息循环: 
while (GetMessage(&msg, NULL, 0, 0))  
{ 
if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))  
{ 
TranslateMessage(&msg); 
DispatchMessage(&msg); 
} 
} 
return (int) msg.wParam; 
} 
// 
//  函数: MyRegisterClass() 
// 
//  目的: 注册窗口类。 
// 
//  注释: 
// 
ATOM MyRegisterClass(HINSTANCE hInstance, LPTSTR szWindowClass) 
{ 
WNDCLASS wc; 
wc.style = CS_HREDRAW | CS_VREDRAW; 
wc.lpfnWndProc   = WndProc; 
wc.cbClsExtra= 0; 
wc.cbWndExtra= 0; 
wc.hInstance = hInstance; 
wc.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_COPYSCREEN)); 
wc.hCursor   = 0; 
wc.hbrBackground = (HBRUSH) GetStockObject(WHITE_BRUSH); 
wc.lpszMenuName  = 0; 
wc.lpszClassName = szWindowClass; 
return RegisterClass(&wc); 
} 
// 
//   函数: InitInstance(HINSTANCE, int) 
// 
//   目的: 保存实例句柄并创建主窗口 
// 
//   注释: 
// 
//在此函数中，我们在全局变量中保存实例句柄并 
//创建和显示主程序窗口。 
// 
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow) 
{ 
HWND hWnd; 
TCHAR szTitle[MAX_LOADSTRING];// 标题栏文本 
TCHAR szWindowClass[MAX_LOADSTRING];// 主窗口类名 
g_hInst = hInstance; // 将实例句柄存储在全局变量中 
// 在应用程序初始化期间，应调用一次 SHInitExtraControls 以初始化 
// 所有设备特定控件，例如，CAPEDIT 和 SIPPREF。 
SHInitExtraControls(); 
LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);  
LoadString(hInstance, IDC_COPYSCREEN, szWindowClass, MAX_LOADSTRING); 
//如果它已经在运行，则将焦点置于窗口上，然后退出 
hWnd = FindWindow(szWindowClass, szTitle); 
if (hWnd)  
{ 
// 将焦点置于最前面的子窗口 
// “| 0x00000001”用于将所有附属窗口置于前台并 
// 激活这些窗口。 
SetForegroundWindow((HWND)((ULONG) hWnd | 0x00000001)); 
return 0; 
}  
if (!MyRegisterClass(hInstance, szWindowClass)) 
{ 
return FALSE; 
} 
hWnd = CreateWindow(szWindowClass, szTitle, WS_VISIBLE, 
CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
NULL, NULL, hInstance, NULL); 
if (!hWnd) 
{ 
return FALSE; 
} 
// 使用 CW_USEDEFAULT 创建主窗口时，将不会考虑菜单栏的高度(如果创建了一个 
// 菜单栏)。因此，我们要在创建窗口后调整其大小 
// 如果菜单栏存在 
if (g_hWndMenuBar) 
{ 
RECT rc; 
RECT rcMenuBar; 
GetWindowRect(hWnd, &rc); 
GetWindowRect(g_hWndMenuBar, &rcMenuBar); 
rc.bottom -= (rcMenuBar.bottom - rcMenuBar.top); 
MoveWindow(hWnd, rc.left, rc.top, rc.right-rc.left, rc.bottom-rc.top, FALSE); 
} 
ShowWindow(hWnd, nCmdShow); 
UpdateWindow(hWnd); 
return TRUE; 
} 
HBITMAP CopyScreenToBitmap(int &nWidth,int &nHeight) 
{ 
// 屏幕和内存设备描述表 
HDC  hScrDC, hMemDC;   
// 位图句柄 
HBITMAP  hBitmap, hOldBitmap; 
// 屏幕分辨率 
int  xScrn, yScrn;  
//为屏幕创建设备描述表 
hScrDC = CreateDC(_T("DISPLAY"), NULL, NULL, NULL); 
//为屏幕设备描述表创建兼容的内存设备描述表 
hMemDC = CreateCompatibleDC(hScrDC); 
// 获得屏幕分辨率 
xScrn = GetDeviceCaps(hScrDC, HORZRES); 
yScrn = GetDeviceCaps(hScrDC, VERTRES); 
//存储屏幕的长宽 
nWidth = xScrn; 
nHeight = yScrn; 
// 创建一个与屏幕设备描述表兼容的位图 
hBitmap = CreateCompatibleBitmap(hScrDC, xScrn, yScrn); 
// 把新位图选到内存设备描述表中 
hOldBitmap = (HBITMAP)SelectObject(hMemDC, hBitmap); 
// 把屏幕设备描述表拷贝到内存设备描述表中 
BitBlt(hMemDC, 0, 0, xScrn,yScrn,hScrDC, 0, 0, SRCCOPY); 
//得到屏幕位图的句柄 
hBitmap = (HBITMAP)SelectObject(hMemDC, hOldBitmap); 
//清除  
DeleteDC(hScrDC); 
DeleteDC(hMemDC); 
// 返回位图句柄 
return hBitmap; 
} 
 
//将截屏所得保存为16位的图片 

int Save16BitmapToFile(HBITMAP hBitmap,LPCTSTR lpFileName)

{ 

HDC hDC=CreateDC(TEXT("DISPLAY"),NULL,NULL,NULL); 

HDC hOffDC=CreateCompatibleDC(hDC); 

SelectObject(hOffDC,hBitmap); 

BITMAP Bitmap; 

GetObject(hBitmap,sizeof(BITMAP),&Bitmap); 

HANDLE fh=CreateFile(lpFileName,GENERIC_WRITE,0,NULL,CREATE_ALWAYS, 

FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN,NULL); 

if(fh == INVALID_HANDLE_VALUE ) 

return FALSE; 

BITMAPFILEHEADER bfh; 

memset(&bfh,0,sizeof(bfh)); 

bfh.bfType=0x4D42/*((WORD) ('M' << 8) | 'B')*/; 

bfh.bfSize= sizeof(bfh)+2*Bitmap.bmWidth*Bitmap.bmHeight

+sizeof(BITMAPFILEHEADER); 

bfh.bfOffBits=sizeof(BITMAPINFOHEADER)+sizeof(BITMAPFILEHEADER); 

DWORD dwWritten=0; 

WriteFile(fh,&bfh,sizeof(bfh),&dwWritten,NULL); 

BITMAPINFOHEADER bih; 

memset(&bih,0,sizeof(bih)); 

bih.biSize=sizeof(bih); 

bih.biWidth=Bitmap.bmWidth; 

bih.biHeight=Bitmap.bmHeight; 

bih.biPlanes=1; 

bih.biBitCount=16; 

if( !WriteFile(fh,&bih,sizeof(bih),&dwWritten,NULL) ) 

{ 

return FALSE; 

} 

BITMAPINFO bitmapInfo; 

memset((void *)&bitmapInfo,0,sizeof(BITMAPINFO) ); 

bitmapInfo.bmiHeader=bih; 

HDC hMemDC=CreateCompatibleDC(hDC); 

BYTE *m_lpBitBmp=new BYTE[bfh.bfSize-sizeof(BITMAPFILEHEADER)]; 

HBITMAP hDibBitmap=CreateDIBSection(hMemDC,&bitmapInfo,

DIB_RGB_COLORS,(void **)&m_lpBitBmp,NULL,0); 

if(hDibBitmap != 0) 

{ 

::SelectObject(hMemDC,hDibBitmap); 

BitBlt(hMemDC,0,0,Bitmap.bmWidth,Bitmap.bmHeight,hOffDC,0,0,SRCCOPY); 

WriteFile(fh,m_lpBitBmp,bfh.bfSize-sizeof(BITMAPFILEHEADER),

&dwWritten,NULL); 

} 

DeleteObject(hDibBitmap); 

DeleteDC(hDC); 

DeleteDC(hMemDC); 

CloseHandle(fh); 

return 1; 

} 


//将截屏所得保存为24位的图片


int Save24BitmapToFile(HBITMAP hBitmap,LPCTSTR lpFileName)


{ 

HDC hDC=CreateDC(TEXT("DISPLAY"),NULL,NULL,NULL); 

HDC hOffDC=CreateCompatibleDC(hDC); 

SelectObject(hOffDC,hBitmap); 

BITMAP Bitmap; 

GetObject(hBitmap,sizeof(BITMAP),&Bitmap); 

HANDLE fh=CreateFile(lpFileName,GENERIC_WRITE,0,NULL,CREATE_ALWAYS, 

FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN,NULL); 

if(fh == INVALID_HANDLE_VALUE ) 

return FALSE; 

BITMAPFILEHEADER bfh; 

memset(&bfh,0,sizeof(bfh)); 

bfh.bfType=0x4D42/*((WORD) ('M' << 8) | 'B')*/; 

bfh.bfSize= sizeof(bfh)+3*Bitmap.bmWidth*Bitmap.bmHeight

+sizeof(BITMAPFILEHEADER); 

bfh.bfOffBits=sizeof(BITMAPINFOHEADER)+sizeof(BITMAPFILEHEADER); 

DWORD dwWritten=0; 

WriteFile(fh,&bfh,sizeof(bfh),&dwWritten,NULL); 

BITMAPINFOHEADER bih; 

memset(&bih,0,sizeof(bih)); 

bih.biSize=sizeof(bih); 

bih.biWidth=Bitmap.bmWidth; 

bih.biHeight=Bitmap.bmHeight; 

bih.biPlanes=1; 

bih.biBitCount=24; 

if( !WriteFile(fh,&bih,sizeof(bih),&dwWritten,NULL) ) 

{ 

return FALSE; 

} 

BITMAPINFO bitmapInfo; 

memset((void *)&bitmapInfo,0,sizeof(BITMAPINFO) ); 

bitmapInfo.bmiHeader=bih; 

HDC hMemDC=CreateCompatibleDC(hDC); 

BYTE *m_lpBitBmp=new BYTE[3*Bitmap.bmWidth*Bitmap.bmHeight]; 

HBITMAP hDibBitmap=CreateDIBSection(hMemDC,&bitmapInfo,

DIB_RGB_COLORS,(void **)&m_lpBitBmp,NULL,0); 

if(hDibBitmap != 0) 

{ 

::SelectObject(hMemDC,hDibBitmap); 

BitBlt(hMemDC,0,0,Bitmap.bmWidth,Bitmap.bmHeight,hOffDC,0,0,SRCCOPY); 

WriteFile(fh,m_lpBitBmp,3*Bitmap.bmWidth*Bitmap.bmHeight,&dwWritten,NULL); 

} 

DeleteObject(hDibBitmap); 

DeleteDC(hDC); 

DeleteDC(hMemDC); 

CloseHandle(fh); 

return 1; 

} 

 

/*索引颜色/颜色表  

位图常用的一种压缩方法。从位图图片中选择最有代表性的若干种颜色（通常不超过256种）

编制成颜色表，然后将图片中原有颜色用颜色表的索引来表示。 

这样原图片可以被大幅度有损压缩。适合于压缩网页图形等颜色数较少的图形， 

不适合压缩照片等色彩丰富的图形。 */ 


//将截屏所得保存为32位带颜色表的图片 


int Save32BitmapToFile(HBITMAP hBitmap,LPCTSTR lpFileName)

{ 

/*若不使用颜色表，则去掉bih.biCompression=BI_BITFIELDS;这句，然后 

不设置bitmapInfo.bmiColors[0].rgbRed=255; 

bitmapInfo.bmiColors[0].rgbGreen=255; 

bitmapInfo.bmiColors[0].rgbBlue=255;*/ 

HDC hDC=CreateDC(TEXT("DISPLAY"),NULL,NULL,NULL); 

HDC hOffDC=CreateCompatibleDC(hDC); 

SelectObject(hOffDC,hBitmap); 

BITMAP Bitmap; 

GetObject(hBitmap,sizeof(BITMAP),&Bitmap); 

HANDLE fh=CreateFile(lpFileName,GENERIC_WRITE,0,NULL,CREATE_ALWAYS, 

FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN,NULL); 

if(fh == INVALID_HANDLE_VALUE ) 

return FALSE; 

BITMAPFILEHEADER bfh; 

memset(&bfh,0,sizeof(bfh)); 

bfh.bfType=0x4D42/*((WORD) ('M' << 8) | 'B')*/; 

bfh.bfSize= sizeof(bfh)+4*Bitmap.bmWidth*Bitmap.bmHeight

+sizeof(BITMAPFILEHEADER); 

bfh.bfOffBits=sizeof(BITMAPINFOHEADER)+sizeof(BITMAPFILEHEADER); 

DWORD dwWritten=0; 

WriteFile(fh,&bfh,sizeof(bfh),&dwWritten,NULL); 

BITMAPINFOHEADER bih; 

memset(&bih,0,sizeof(bih)); 

bih.biSize=sizeof(bih); 

bih.biWidth=Bitmap.bmWidth; 

bih.biHeight=Bitmap.bmHeight; 

bih.biPlanes=1; 

bih.biBitCount=32; 

bih.biCompression=BI_BITFIELDS; 

if( !WriteFile(fh,&bih,sizeof(bih),&dwWritten,NULL) ) 

{ 

return FALSE; 

} 

BITMAPINFO bitmapInfo; 

memset((void *)&bitmapInfo,0,sizeof(BITMAPINFO) ); 

bitmapInfo.bmiHeader=bih; 

bitmapInfo.bmiColors[0].rgbRed=255; 

bitmapInfo.bmiColors[0].rgbGreen=255; 

bitmapInfo.bmiColors[0].rgbBlue=255; 

HDC hMemDC=CreateCompatibleDC(hDC); 

BYTE *m_lpBitBmp=new BYTE[4*Bitmap.bmWidth*Bitmap.bmHeight]; 

HBITMAP hDibBitmap=CreateDIBSection(hMemDC,&bitmapInfo,

DIB_RGB_COLORS,(void **)&m_lpBitBmp,NULL,0); 

if(hDibBitmap != 0) 

{ 

::SelectObject(hMemDC,hDibBitmap); 

BitBlt(hMemDC,0,0,Bitmap.bmWidth,Bitmap.bmHeight,hOffDC,0,0,SRCCOPY); 

WriteFile(fh,m_lpBitBmp,4*Bitmap.bmWidth*Bitmap.bmHeight,&dwWritten,NULL); 

} 

DeleteObject(hDibBitmap); 

DeleteDC(hDC); 

DeleteDC(hMemDC); 

CloseHandle(fh); 

return 1; 

} 

 
//将截屏所得保存为jpeg图片


int SaveJPEGToFile(HBITMAP hBitmap,LPCSTR lpFileName) 


{ 

HDC hDC=CreateDC(TEXT("DISPLAY"),NULL,NULL,NULL); 

HDC hOffDC=CreateCompatibleDC(hDC); 

SelectObject(hOffDC,hBitmap); 

BITMAP Bitmap; 

GetObject(hBitmap,sizeof(BITMAP),&Bitmap); 

 

HANDLE fh=CreateFile((LPCWSTR)lpFileName,GENERIC_WRITE,0,NULL,CREATE_ALWAYS, 

FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN,NULL); 

if(fh == INVALID_HANDLE_VALUE ) 

return FALSE; 

BITMAPFILEHEADER bfh; 

memset(&bfh,0,sizeof(bfh)); 

bfh.bfType=0x4D42/*((WORD) ('M' << 8) | 'B')*/; 

bfh.bfSize= sizeof(bfh)+3*Bitmap.bmWidth*Bitmap.bmHeight+sizeof(BITMAPFILEHEADER); 

bfh.bfOffBits=sizeof(BITMAPINFOHEADER)+sizeof(BITMAPFILEHEADER); 

DWORD dwWritten=0; 

//WriteFile(fh,&bfh,sizeof(bfh),&dwWritten,NULL); 

BITMAPINFOHEADER bih; 

memset(&bih,0,sizeof(bih)); 

bih.biSize=sizeof(bih); 

bih.biWidth=Bitmap.bmWidth; 

bih.biHeight=Bitmap.bmHeight; 

bih.biPlanes=1; 

bih.biBitCount=24; 

/*if( !WriteFile(fh,&bih,sizeof(bih),&dwWritten,NULL) ) 

{ 

return FALSE; 

}*/ 

BITMAPINFO bitmapInfo; 

memset((void *)&bitmapInfo,0,sizeof(BITMAPINFO) ); 

bitmapInfo.bmiHeader=bih; 

HDC hMemDC=CreateCompatibleDC(hDC); 

BYTE *m_lpBitBmp=new BYTE[bfh.bfSize-sizeof(BITMAPFILEHEADER)]; 

HBITMAP hDibBitmap=CreateDIBSection(hMemDC,&bitmapInfo,

DIB_RGB_COLORS,(void **)&m_lpBitBmp,NULL,0); 

if(hDibBitmap != 0) 

{ 

::SelectObject(hMemDC,hDibBitmap); 

BitBlt(hMemDC,0,0,Bitmap.bmWidth,Bitmap.bmHeight,hOffDC,0,0,SRCCOPY); 

//WriteFile(fh,m_lpBitBmp,bfh.bfSize-sizeof(BITMAPFILEHEADER),&dwWritten,NULL);

WriteJPEGFile(lpFileName, m_lpBitBmp,Bitmap.bmWidth,Bitmap.bmHeight,TRUE, 60);

} 

DeleteObject(hDibBitmap); 

DeleteDC(hDC); 

DeleteDC(hMemDC); 

CloseHandle(fh); 

return 1; 

} 

 

//  函数: WndProc(HWND, UINT, WPARAM, LPARAM) 

//  目的: 处理主窗口的消息。 

//  WM_COMMAND- 处理应用程序菜单 

//  WM_PAINT- 绘制主窗口 

//  WM_DESTROY- 发送退出消息并返回 

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) 

{ 

int wmId, wmEvent; 

PAINTSTRUCT ps; 

HDC hdc; 

static SHACTIVATEINFO s_sai; 

int iWidth,iHeight; 

HBITMAP hBitmap; 

static int s_cxBegin; 

static int s_cyBegin; 

static int s_cxEnd; 

static int s_cyEnd; 

switch (message)  

{ 

case WM_COMMAND: 

wmId= LOWORD(wParam);  

wmEvent = HIWORD(wParam);  

// 分析菜单选择: 

switch (wmId) 

{ 

case IDM_HELP_ABOUT: 

DialogBox(g_hInst, (LPCTSTR)IDD_ABOUTBOX, hWnd, About); 

break; 

case IDM_OK: 

SendMessage (hWnd, WM_CLOSE, 0, 0); 

break; 

case ID_RGB16: 

hBitmap=CopyScreenToBitmap(iWidth,iHeight); 

Save16BitmapToFile(hBitmap,TEXT("\\a.bmp")); 

break; 

case ID_RGB24: 

hBitmap=CopyScreenToBitmap(iWidth,iHeight); 

Save24BitmapToFile(hBitmap,TEXT("\\b.bmp")); 

break; 

case ID_RGB32: 

hBitmap=CopyScreenToBitmap(iWidth,iHeight); 

Save32BitmapToFile(hBitmap,TEXT("\\c.bmp")); 

break; 

case ID_JPEG: 

hBitmap=CopyScreenToBitmap(iWidth,iHeight); 

SaveJPEGToFile(hBitmap,"d.jpg"); 

break; 

default: 

return DefWindowProc(hWnd, message, wParam, lParam); 

} 

break; 

case WM_CREATE: 

SHMENUBARINFO mbi; 

memset(&mbi, 0, sizeof(SHMENUBARINFO)); 

mbi.cbSize = sizeof(SHMENUBARINFO); 

mbi.hwndParent = hWnd; 

mbi.nToolBarId = IDR_MENU; 

mbi.hInstRes   = g_hInst; 

if (!SHCreateMenuBar(&mbi))  

{ 

g_hWndMenuBar = NULL; 

} 

else 

{ 

g_hWndMenuBar = mbi.hwndMB; 

} 

// 初始化外壳程序激活信息结构 

memset(&s_sai, 0, sizeof (s_sai)); 

s_sai.cbSize = sizeof (s_sai); 

break; 

case WM_LBUTTONDOWN: 

HCURSOR  hCursor; 

hCursor=SetCursor( LoadCursor(NULL,MAKEINTRESOURCE(IDC_WAIT) ) ); 

s_cxBegin=LOWORD(lParam); 

s_cyBegin=HIWORD(lParam); 

break; 

case WM_LBUTTONUP: 

s_cxEnd=LOWORD(lParam); 

s_cyEnd=HIWORD(lParam); 

SetCursor( LoadCursor( GetModuleHandle(NULL),MAKEINTRESOURCE(IDC_ARROW) ) ); 

break; 

case WM_PAINT: 

hdc = BeginPaint(hWnd, &ps); 

// TODO: 在此添加任意绘图代码... 

EndPaint(hWnd, &ps); 

break; 

case WM_DESTROY: 

CommandBar_Destroy(g_hWndMenuBar); 

PostQuitMessage(0); 

break; 

case WM_ACTIVATE: 

// 向外壳程序通知我们的激活消息 

SHHandleWMActivate(hWnd, wParam, lParam, &s_sai, FALSE); 

break; 

case WM_SETTINGCHANGE: 

SHHandleWMSettingChange(hWnd, wParam, lParam, &s_sai); 

break; 

default: 

return DefWindowProc(hWnd, message, wParam, lParam); 

} 

return 0; 

}