avi转bmp：利用VFW将视频文件转换为位图

1.vfw.h
2.vfw32.lib
3.代码：
void CAVI2BMPDlg::OnTO() 
{
// TODO: Add your control notification handler code here
//SetTimer  (  1,  1000,  NULL)  ;  
//CString  strOpenFileType  =  "位图文件  (*.bmp;*.dib)  &brvbar*.bmp;  
//*.dib  &brvbarAll  Files  (*.*)  &brvbar*.*  &brvbar  &brvbar";  
 //打开avi视频文件  
CFileDialog  FileDlg(TRUE);//,"*.avi",NULL,OFN_HIDEREADONLY|FN_OVERWRITEPROMPT,_T("视频文件(*.avi)|*.avi|"));  
CString  m_avifile;  
if(FileDlg.DoModal()  ==  IDOK){  
m_avifile=FileDlg.GetPathName();  
//初始化，以及提取信息  
PAVIFILE  pfile;//Pointer  to  a  buffer  that  receives  the  new  IAVIFile  interface  pointer.                                      
AVIFILEINFO    pfi;                          
PAVISTREAM    pavi;                                                  
PGETFRAME  pgf;                                                                                      
long  length,  start;  
//initializes  the  AVIFile  library,同AVIFileExit()对应。  
//Call  AVIFileInit()  before  using  any  other  AVIFile  functions              
AVIFileInit();  
AVIFileOpen(&pfile,m_avifile,OF_READ|OF_SHARE_DENY_NONE,NULL);  
//obtains  information  about  an  AVI  file  
AVIFileInfo(pfile,&pfi,sizeof(AVIFILEINFO));  
AVIFileGetStream(pfile,&pavi,streamtypeVIDEO,0);  
length=AVIStreamLength(pavi);  
start=AVIStreamStart(pavi);  
AVISTREAMINFO  si;