BAI THUC HANH SO 2 WINDOW

//Em không biết kèm theo file, mong các anh chị thông cảm

void CChildView::OnPaint()
{
CPaintDC dc(this); // device context for painting

// TODO: Add your message handler code here

// Do not call CWnd::OnPaint() for painting messages


CPoint points[10];
int npts = 0;

CRect rect;
GetClientRect (&rect);
rect.SetRect(0,0,rect.Width()/3, rect.Height()/2);


for (int i=0; i<2; i++)
{
for (int j=0; j<3; j++)
{
http://dc.Rectangle(&rect);
switch (i*3+j) /// thu tu cua cac hcn i*3+j
{
case 0:
dc.MoveTo(rect.TopLeft());
dc.LineTo(rect.BottomRight());

break;

case 1:
points[npts++] = rect.TopLeft();
points[npts++] = CPoint(rect.left + rect.Width()/4, rect.bottom);
points[npts++] = rect.CenterPoint();
points[npts++] = CPoint(rect.left + 3*rect.Width()/4, rect.bottom);
points[npts++] = CPoint(rect.right, rect.top);

dc.Polyline(points, npts);
break;
case 2:
{
npts=0;

points[npts++] = rect.TopLeft();
points[npts++] = CPoint(rect.left + rect.Width()/4, rect.bottom);
points[npts++] = CPoint(rect.left + rect.Width()/2, rect.top);
points[npts++] = CPoint(rect.left + rect.Width()/2, rect.bottom);
points[npts++] = CPoint(rect.left + 3*rect.Width()/4, rect.top);
points[npts++] = rect.BottomRight();

const DWORD a[2]={3,3};

dc.PolyPolyline(points,a,2);
dc.DrawText(_T("Line"), &rect, DT_CENTER|DT_VCENTER|DT_SINGLELINE);
}
break;
case 3:
npts = 0;
points[npts++] = rect.TopLeft();
points[npts++] = CPoint(rect.right, rect.top);
points[npts++] = CPoint(rect.left, rect.bottom);
points[npts++] = rect.BottomRight();

dc.PolyBezier(points, npts);
break;
case 4:
npts = 0;
points[npts++] = CPoint(rect.CenterPoint().x, rect.bottom);
points[npts++] = CPoint(rect.right, rect.top + rect.Height()/3);
points[npts++] = CPoint(rect.right - rect.Width()/4, rect.top);
points[npts++] = CPoint(rect.CenterPoint().x, rect.top + rect.Height()/3);
points[npts++] = CPoint(rect.left + rect.Width()/4, rect.top);
points[npts++] = CPoint(rect.left, rect.top + rect.Height()/3);
points[npts++] = points[0];


dc.PolyBezier(points, npts);

// line, polyline, bezier, polybezier
// ve text drawtext
}
rect.OffsetRect(rect.Width(),0);
}
rect.OffsetRect(-3*rect.Width(), rect.Height());
}





}

Lập trình Windows chứ hỏng phải là java.