对准器（捕获窗口句柄）

最新推荐文章于 2024-09-06 10:00:14 发布

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对准器（捕获窗口句柄）

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示例代码下载：CFinder.zip （请不要直接使用迅雷下载）
测试环境：VC6.0+WinXP
图片预览：

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一、功能：
寻找窗口句柄。我们经常在一些软件中能看到它的身影，如常用工具spy++。

二、使用方法：
1.添加3个资源图标和鼠标 IDB_NOMAL IDB_BLANK IDC_CROSS0
2.在对话框上放一个PICTURE控件,ID号为IDC_CAPTURE，选择位图类型，再选择IDB_NOMAL
3.调用方法：
    鼠标按下时调用 CFinder::MouseDown(m_hWnd);
    鼠标弹起时调用 CFinder::MouseUp();
    鼠标移动时调用
if (CFinder::MouseUp())
{
  //捕捉了窗口
}

4.CFinder::FindWnd保存了找到窗口的句柄

三、CFinder代码：

使用前添加资源图标

class CFinder
{
public:
static void MouseDown(HWND hWnd)
{
  hStatic  = ::GetDlgItem(hWnd,IDC_CAPTURE);
  hBmpBlank = LoadBitmap (::GetModuleHandle(NULL), MAKEINTRESOURCE(IDB_BLANK));
  hCurCross = LoadCursor (::GetModuleHandle(NULL), MAKEINTRESOURCE(IDC_CROSS0));

  POINT point;
  ::GetCursorPos(&point);
  RECT rc;
  ::GetWindowRect(hStatic, &rc);
  if( ::PtInRect(&rc, point) )
  {
   bCapture = true;

   ::SetCursor( hCurCross );
   hBmpNomal=(HBITMAP)::SendMessage (hStatic,STM_SETIMAGE,IMAGE_BITMAP,(long)hBmpBlank);
   ::SetCapture( hWnd );

   //必须把上次窗口句柄置空
   FindWnd=NULL;
  }
}
static bool MouseUp()
{
  if( bCapture )
  {
   bCapture = false;
   ::SetCursor( LoadCursor(NULL,IDC_ARROW) );
   ::SendMessage (hStatic,STM_SETIMAGE,IMAGE_BITMAP,(long)hBmpNomal);
   ::ReleaseCapture();

   if( FindWnd )
    HeightLightWnd(FindWnd);

::DeleteObject(hBmpBlank);
::DeleteObject(hCurCross);

   return true;
  }
  else
   return false;
}
static bool MouseMove()
{
  if (bCapture)
  {
   POINT point;
   ::GetCursorPos(&point);
   HWND hWnd=SmallestWindowFromPoint(point);
//   HWND hWnd=::WindowFromPoint(point);

   //第一次进入窗口
   if (FindWnd != hWnd)
   {
    HeightLightWnd(FindWnd);//刷新旧窗口
    FindWnd=hWnd;   //保存wnd
    HeightLightWnd(hWnd); //高亮度新窗口
   }

   return true;
  }
  else
   return false;
}

/****************************************************************************
把窗体的边框画上线条
参数1 hWnd : 指定窗口句柄
****************************************************************************/
static void HeightLightWnd(HWND hWnd)
{
  RECT DesRect;
  ::GetWindowRect(hWnd,&DesRect);
  DesRect.left+=2; DesRect.top+=2; DesRect.right-=2; DesRect.bottom-=2;

  HDC hdc=::GetDC(NULL);
  HPEN Pen=::CreatePen(PS_SOLID,4,RGB(0,0,0));
  HPEN OldPen=(HPEN)SelectObject(hdc,Pen) ;
  SelectObject (hdc, GetStockObject (NULL_BRUSH)) ; //设置为空刷

  SetROP2 (hdc, R2_NOT) ; //当前绘制的像素值设为屏幕像素值的反,这样可以覆盖掉上次的绘图(自动擦除上次图形）
  Rectangle (hdc, DesRect.left,DesRect.top,DesRect.right,DesRect.bottom) ; //擦除原来的图形

  ::SelectObject (hdc,OldPen) ;
  ::DeleteObject(Pen);
  ::ReleaseDC(NULL,hdc);
}

//-----------------------------------------------
// SmallestWindowFromPoint
// Notice: from PasswordSpy by Brian Friesen
//
// Find the smallest window still containing the point
//
// WindowFromPoint returns the first window in the Z-order ->
// if the password control is sorounded by a Group Box or some other control,
// WindowFromPoint returns the handle to the sorounding control instead
// to the password control.
//
static HWND SmallestWindowFromPoint( const POINT point )
{
  RECT rect, rcTemp;
  HWND hParent, hWnd, hTemp;

  hWnd = ::WindowFromPoint( point );
  if( hWnd != NULL )
  {
   ::GetWindowRect( hWnd, &rect );
   hParent = ::GetParent( hWnd );

   // Has window a parent?
   if( hParent != NULL )
   {
    // Search down the Z-Order
    hTemp = hWnd;
    do{
     hTemp = ::GetWindow( hTemp, GW_HWNDNEXT );

     // Search window contains the point, hase the same parent, and is visible?
     ::GetWindowRect( hTemp, &rcTemp );
     if(::PtInRect(&rcTemp, point) && ::GetParent(hTemp) == hParent && ::IsWindowVisible(hTemp))
     {
      // Is it smaller?
      if(((rcTemp.right - rcTemp.left) * (rcTemp.bottom - rcTemp.top)) < ((rect.right - rect.left) * (rect.bottom - rect.top)))
      {
       // Found new smaller window!
       hWnd = hTemp;
       ::GetWindowRect(hWnd, &rect);
      }
     }
    }while( hTemp != NULL );
   }
  }

  return hWnd;
}

public:
static HWND  FindWnd;
private:
static HWND  hStatic;
static HCURSOR hCurCross;
static HBITMAP hBmpNomal;
static HBITMAP hBmpBlank;
static bool  bCapture ;
};

HWND CFinder::hStatic=NULL;
HCURSOR CFinder::hCurCross=NULL;
HBITMAP CFinder::hBmpNomal=NULL;
HBITMAP CFinder::hBmpBlank=NULL;
bool CFinder::bCapture=false;
HWND CFinder::FindWnd=NULL;

四、调用示例：

void CDemoDlg::OnLButtonDown(UINT nFlags, CPoint point)
{
CFinder::MouseDown(m_hWnd);
CDialog::OnLButtonDown(nFlags, point);
}

void CDemoDlg::OnLButtonUp(UINT nFlags, CPoint point)
{
if (CFinder::MouseUp() )
{
trace(CFinder::FindWnd);
}
CDialog::OnLButtonUp(nFlags, point);
}

void CDemoDlg::OnMouseMove(UINT nFlags, CPoint point)
{
CFinder::MouseMove();
CDialog::OnMouseMove(nFlags, point);
}

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五、请看另外一篇相关文章：
捕获窗口信息的小工具
http://hi.baidu.com/qiujiejia/blog/item/cb8ab1eec95e20ebb2fb9507.html