C#實現類似qq的屏幕截圖程序(3)

輔助函數

本來應該寫更多的輔助函數的,將窗體響應函數裡面的代碼放到裡面來,不過本人很懶,就這樣將就了.呵呵

private void DrawRect(Graphics Painter, int Mouse_x, int Mouse_y)
{
　　int width = 0;
　　int heigth = 0;
　　if (Mouse_y < Rect.Y)
　　{
　　　　Rect.Y = Mouse_y;
　　　　heigth = downPoint.Y - Mouse_y;
　　}
　　else
　　{
　　　　heigth = Mouse_y - downPoint.Y;
　　}
　　if (Mouse_x < Rect.X)
　　{
　　　　Rect.X = Mouse_x;
　　　　width = downPoint.X - Mouse_x;
　　}
　　else
　　{
　　　　width = Mouse_x - downPoint.X;
　　}
　　Rect.Size = new Size(width, heigth);
　　Painter.DrawRectangle(pen, Rect);
}

private Image DrawScreen(Image back, int Mouse_x, int Mouse_y)
{
　　Graphics Painter = Graphics.FromImage(back);
　　DrawRect(Painter, Mouse_x, Mouse_y);
　　return back;
}
private void MoveRect(Image image, Rectangle Rect)
{
　　Graphics Painter = Graphics.FromImage(image);
　　Painter.DrawRectangle(pen, Rect.X, Rect.Y, Rect.Width, Rect.Height);
　　DrawRects(Painter);
　　MainPainter.DrawImage(image, 0, 0);
　　image.Dispose();
}

到這裡,代碼就算是寫完了,運行

http://www.cnblogs.com/kevin-wu/archive/2006/12/24/601989.Html