Turn you Monitor off from your application.
Turn Off Your Monitor
public partial class Form1 : Form
{
public int WM_SYSCOMMAND = 0x0112;
public int SC_MONITORPOWER = 0xF170;
[DllImport("user32.dll")]
private static extern int SendMessage(int hWnd, int hMsg, int wParam, int lParam);
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
SendMessage( this.Handle.ToInt32() , WM_SYSCOMMAND , SC_MONITORPOWER ,2 );//DLL function
}
}
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