r  =  new  byte[100];
  
showVideo.capGetDriverDescriptionA(0,  lpszName,  100,lpszVer,  100);
this.lwndC  =  showVideo.capCreateCaptureWindowA(lpszName,  showVideo.WS_VISIBLE  +  showVideo.WS_CHILD,  0,  0,  mWidth,  mHeight,  mControlPtr,  0);
  
if  (this.capDriverConnect(this.lwndC,  0))
{
this.capPreviewRate(this.lwndC,  66);
this.capPreview(this.lwndC,  true);
showVideo.BITMAPINFO  bitmapinfo  =  new  showVideo.BITMAPINFO();  
bitmapinfo.bmiHeader.biSize  =  showVideo.SizeOf(bitmapinfo.bmiHeader);
bitmapinfo.bmiHeader.biWidth  =  352;
bitmapinfo.bmiHeader.biHeight  =  288;
bitmapinfo.bmiHeader.biPlanes  =  1;
bitmapinfo.bmiHeader.biBitCount  =  24;
this.capSetVideoFormat(this.lwndC,  ref  bitmapinfo,  showVideo.SizeOf(bitmapinfo));
this.mFrameEventHandler  =  new  showVideo.FrameEventHandler(FrameCallBack);
this.capSetCallbackOnFrame(this.lwndC,  this.mFrameEventHandler);
showVideo.SetWindowPos(this.lwndC,  0,  0,  0,  mWidth  ,  mHeight  ,  6);
}  
}

//  private  functions
private  bool  capDriverConnect(IntPtr  lwnd,  short  i)
{
return  showVideo.SendMessage(lwnd,  showVideo.WM_CAP_DRIVER_CONNECT,  i,  0);
}

private  bool  capdriverdisconnect(intptr  lwnd)
{
return  showVideo.SendMessage(lwnd,  showVideo.WM_CAP_DRIVER_DISCONNECT,  0,  0);
}
  
private  bool  capPreview(IntPtr  lwnd,  bool  f)
{
return  showVideo.SendMessage(lwnd,  showVideo.WM_CAP_SET_PREVIEW  ,  f,  0);
}

private  bool  cappreviewrate(intptr  lwnd,  short  wms)
{
return  showVideo.SendMessage(lwnd,  showVideo.WM_CAP_SET_PREVIEWRATE,  wMS,  0);
}
  
private  bool  capSetCallbackOnFrame(IntPtr  lwnd,  showVideo.FrameEventHandler  lpProc)
{  
return  showVideo.SendMessage(lwnd,  showVideo.WM_CAP_SET_CALLBACK_FRAME,  0,  lpProc);
}

private  bool  capsetvideoformat(intptr  hcapwnd,  ref  showvideo.bitmapinfo  bmpformat,  int  capformatsize)
{
return  showVideo.SendMessage(hCapWnd,  showVideo.WM_CAP_SET_VIDEOFORM