C#调用系统API设置桌面背景

 

[DllImport("user32.dll", EntryPoint = "SystemParametersInfo")]

public static extern int SystemParametersInfo( int uAction, int uParam, string lpvParam, int fuWinIni );

private void button1_Click(object sender, EventArgs e)

 {

         Image image = Image.FromFile("D:\\AAA.jpg");

         image.Save("D:\\AAA.bmp",System.Drawing.Imaging.ImageFormat.Bmp);

        SystemParametersInfo(20, 0, "D:\\AAA.bmp", 0x2); 

}