C#获取桌面壁纸图片的路径(Desktop Wallpaper)

using System.Runtime.InteropServices;

[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
static extern bool SystemParametersInfo(uint uAction, uint uParam, StringBuilder lpvParam, uint init);

const uint SPI_GETDESKWALLPAPER = 0x0073;

StringBuilder wallPaperPath = new StringBuilder(200);

if (SystemParametersInfo(SPI_GETDESKWALLPAPER, 200, wallPaperPath, 0))
{
    MessageBox.Show(wallPaperPath.ToString());
}