CDC Help for color an object - visual-studio

Question

hi
There is a function in C++ Visual studio CDC::ExtFloodFill(int x, int y, COLORREF crColor,UINT nFillType);
my question is that what we suppose to write in place of
int x , int y, COLORREF crColor, UINT nFillType
Like if I have a Object Which I want to Color How to do it
enter code here
#include "afxwin.h"
class fr : public CFrameWnd
{
public:
CPoint st;
CPoint en;
fr()
{
Create(0,"First Frame");
}
//////////////////////
void OnLButtonDown(UINT fl,CPoint p )
{
st.x=p.x;
st.y=p.y;
}
//////////////////////
void OnLButtonUp(UINT fl,CPoint r)
{
en.x=r.x;
en.y=r.y;
CClientDC d(this);
d.Ellipse(st.x,st.y,en.x,en.y);
}
void OnRButtonDown(UINT fl,CPoint q)
{
CClientDC e(this);
e.ExtFloodFill(............);
}
DECLARE_MESSAGE_MAP()
};
BEGIN_MESSAGE_MAP(fr,CFrameWnd)
ON_WM_LBUTTONDOWN()
ON_WM_RBUTTONDOWN()
END_MESSAGE_MAP()
class app : public CWinApp
{
public:
int InitInstance()
{
fr*sal;
sal=new fr;
m_pMainWnd=sal;
sal->ShowWindow(1);
return true;
}
};
app a;

Answer 1

For your example, ExtFloodFill (or any other version of FloodFill) isn't really the right choice.
Instead, you normally want to set the current brush to the color/pattern you want, then draw your object (and it'll automatically be filled with the current brush). Let's say, for example, that you want to draw a red ellipse:
CMyView::OnDraw(CDC *pDC) {
CBrush red_brush;
red_brush.CreateSolidBrush(RGB(255, 0, 0));
pDC->SelectObject(red_brush);
pDC->Ellipse(0, 0, 100, 50);
}
Edit: Okay, if you really insist it has to be a flood-fill, and you're doing it in response to a button click, you'd probably do something like this:
void CYourView::OnRButtonDown(UINT nFlags, CPoint point)
{
CClientDC dc(this);
CBrush blue_brush;
blue_brush.CreateSolidBrush(RGB(0, 0, 255));
dc.SelectObject(blue_brush);
dc.ExtFloodFill(point.x, point.y, RGB(0, 0,0), FLOODFILLBORDER);
CView::OnRButtonDown(nFlags, point);
}