屏幕捕获程序复制多个选定区域

我遵循Huw Collingbourne程序,用C#创建了一个屏幕捕获程序。然而,我注意到了几个奇怪的项目,无论我使用他创建的程序还是我修改的程序都是如此。具体来说,我创建了一个程序,可以打开一个窗口,让您捕获该区域。 我认为这与我的电脑上的坐姿有关,但如果其他人要使用我的屏幕捕获程序,我需要知道如何预测和解决这个问题! 如果我的windows 10显示设置为100%,我会得到比所选窗口多一点的内容,如果我将显示设置为125%文本,那么我会得到很多所选区域。保留默认大小时,我的大小应为555484。但我捕获的要大得多。

public partial class Form1 : Form
{
    //https://docs.microsoft.com/en-us/windows/desktop/api/winuser/nf-winuser-getwindowrect
    [DllImport("user32.dll")]
    private static extern IntPtr GetForegroundWindow();
    [DllImport("user32.dll")]
    private static extern IntPtr GetDesktopWindow();
    [DllImport("user32.dll")]
    private static extern bool GetWindowRect(IntPtr hWnd, ref Rectangle lpRect);

    //ICON info
    //https://docs.microsoft.com/en-us/windows/desktop/api/winuser/nf-winuser-getcursorinfo
    [DllImport("user32.dll")]
    private static extern bool GetIconInfo(IntPtr hIcon, out ICONINFO piconinfo);
    [DllImport("user32.dll")]
    private static extern bool GetCursorInfo(out CURSORINFO pci);


    public struct POINT
    {
        public Int32 x;
        public Int32 y;
    }

    public struct ICONINFO
    {
        public bool fIcon;
        public Int32 xHotspot;
        public Int32 yHotspot;
        public IntPtr hbmMask;
        public IntPtr hbmColor;
    }

    public struct CURSORINFO
    {
        public Int32 cbSize;
        public Int32 flags;
        public IntPtr hCursor;
        public Point ptScreenPos;
    }

    GrabRegionForm grabForm;

    public void GrabRect(Rectangle rect)
    {
        int rectWidth = rect.Width - rect.Left;
        int rectHeight = rect.Height - rect.Top;
        Bitmap bm = new Bitmap(rectWidth, rectHeight);
        Graphics g = Graphics.FromImage(bm);
        g.CopyFromScreen(rect.Left, rect.Top, 0, 0, new Size(rectWidth, rectHeight));
        DrawMousePointer(g, Cursor.Position.X - rect.Left, Cursor.Position.Y - rect.Top);
        this.pb_screengrab.Image = bm;
        Clipboard.SetImage(bm);
    }
}

public partial class GrabRegionForm : Form
{
    public Rectangle formRect;
    private Form1 mainForm;
    [DllImport("user32.dll")]
    public static extern bool ReleaseCapture();
    [DllImport("user32.dll")]
    public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam);
    private void buttonOK_Click(object sender, EventArgs e)
    {
        formRect = new Rectangle(this.Left, this.Top, this.Left + this.Width, this.Top + this.Height);
        this.Hide();
        mainForm.GrabRect(formRect);
        Close();
    }
}

ScreenGrab with Display at 100%

ScreenGrab with Display at 125%

Area showing capture window

Area Actually Captured