使用C#在Windows Mobile设备上获取屏幕截图

本示例代码演示如何使用C#在Windows Mobile设备上获取屏幕截图。通过使用P/Invoke调用底层API函数来实现。

[DllImport("coredll.dll")]
private static extern IntPtr GetDC(IntPtr hwnd);

[DllImport("coredll.dll")]
private static extern IntPtr CreateCompatibleDC(IntPtr hdc);

[DllImport("coredll.dll")]
private static extern IntPtr CreateCompatibleBitmap(IntPtr hdc, int nWidth, int nHeight);

[DllImport("coredll.dll")]
private static extern IntPtr SelectObject(IntPtr hdc, IntPtr hgdiobj);

[DllImport("coredll.dll")]
private static extern bool BitBlt(IntPtr hdcDest, int xDest, int yDest, int wDest, int hDest, IntPtr hdcSrc, int xSrc, int ySrc, CopyPixelOperation rop);

[DllImport("coredll.dll")]
private static extern bool DeleteDC(IntPtr hdc);

[DllImport("coredll.dll")]
private static extern bool DeleteObject(IntPtr hObject);

public static Bitmap CaptureScreen()
{
    IntPtr hdcScreen = GetDC(IntPtr.Zero);
    IntPtr hdcCompatible = CreateCompatibleDC(hdcScreen);
    IntPtr bmpScreen = CreateCompatibleBitmap(hdcScreen, Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height);
    IntPtr hOld = SelectObject(hdcCompatible, bmpScreen);
    BitBlt(hdcCompatible, 0, 0, Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, hdcScreen, 0, 0, CopyPixelOperation.SourceCopy);
    SelectObject(hdcCompatible, hOld);
    DeleteDC(hdcCompatible);
    DeleteObject(hdcScreen);
    Bitmap bmp = Bitmap.FromHbitmap(bmpScreen);
    DeleteObject(bmpScreen);
    return bmp;
}

免责申明：文章和图片全部来源于公开网络，如有侵权，请通知删除 server@dude6.com