SystemInformation.VirtualScreen Property
Gets the bounds of the virtual screen.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
The VirtualScreen property indicates the bounds of the entire desktop on a multi-monitor system. You can use this property to determine the maximum visual space available on a system that has multiple monitors installed.
The position coordinates of the rectangle indicate the position offset, in pixels, of the upper left corner of the virtual screen area relative to the upper left corner of the onscreen area of the primary display. The size values of the rectangle indicate the size of the virtual screen area.
Note
|
|---|
|
The X position coordinate of the rectangle is negative when the virtual screen starts to the left of the left edge of the primary display. The Y coordinate of the rectangle is negative when the virtual screen starts above the top edge of the primary display. |
|
Note
|
|---|
|
This property is supported only on Windows 98, Windows Millennium Edition, Windows 2000, Windows XP, and the Windows Server 2003 family. |
The following code example lists all properties of the SystemInformation class in a ListBox and displays the current value of the property in a TextBox when a list item selected.
using System; using System.Collections; using System.ComponentModel; using System.Drawing; using System.Reflection; using System.Windows.Forms; namespace SystemInfoBrowser { public class SystemInfoBrowserForm : System.Windows.Forms.Form { private System.Windows.Forms.ListBox listBox1; private System.Windows.Forms.TextBox textBox1; public SystemInfoBrowserForm() { this.SuspendLayout(); InitForm(); // Add each property of the SystemInformation class to the list box. Type t = typeof(System.Windows.Forms.SystemInformation); PropertyInfo[] pi = t.GetProperties(); for( int i=0; i<pi.Length; i++ ) listBox1.Items.Add( pi[i].Name ); textBox1.Text = "The SystemInformation class has "+pi.Length.ToString()+" properties.\r\n"; // Configure the list item selected handler for the list box to invoke a // method that displays the value of each property. listBox1.SelectedIndexChanged += new EventHandler(listBox1_SelectedIndexChanged); this.ResumeLayout(false); } private void listBox1_SelectedIndexChanged(object sender, EventArgs e) { // Return if no list item is selected. if( listBox1.SelectedIndex == -1 ) return; // Get the property name from the list item. string propname = listBox1.Text; if( propname == "PowerStatus" ) { // Cycle and display the values of each property of the PowerStatus property. textBox1.Text += "\r\nThe value of the PowerStatus property is:"; Type t = typeof(System.Windows.Forms.PowerStatus); PropertyInfo[] pi = t.GetProperties(); for( int i=0; i<pi.Length; i++ ) { object propval = pi[i].GetValue(SystemInformation.PowerStatus, null); textBox1.Text += "\r\n PowerStatus."+pi[i].Name+" is: "+propval.ToString(); } } else { // Display the value of the selected property of the SystemInformation type. Type t = typeof(System.Windows.Forms.SystemInformation); PropertyInfo[] pi = t.GetProperties(); PropertyInfo prop = null; for( int i=0; i<pi.Length; i++ ) if( pi[i].Name == propname ) { prop = pi[i]; break; } object propval = prop.GetValue(null, null); textBox1.Text += "\r\nThe value of the "+propname+" property is: "+propval.ToString(); } } private void InitForm() { // Initialize the form settings this.listBox1 = new System.Windows.Forms.ListBox(); this.textBox1 = new System.Windows.Forms.TextBox(); this.listBox1.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) | System.Windows.Forms.AnchorStyles.Left) | System.Windows.Forms.AnchorStyles.Right))); this.listBox1.Location = new System.Drawing.Point(8, 16); this.listBox1.Size = new System.Drawing.Size(172, 496); this.listBox1.TabIndex = 0; this.textBox1.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) | System.Windows.Forms.AnchorStyles.Right))); this.textBox1.Location = new System.Drawing.Point(188, 16); this.textBox1.Multiline = true; this.textBox1.ScrollBars = System.Windows.Forms.ScrollBars.Vertical; this.textBox1.Size = new System.Drawing.Size(420, 496); this.textBox1.TabIndex = 1; this.ClientSize = new System.Drawing.Size(616, 525); this.Controls.Add(this.textBox1); this.Controls.Add(this.listBox1); this.Text = "Select a SystemInformation property to get the value of"; } [STAThread] static void Main() { Application.Run(new SystemInfoBrowserForm()); } } }
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
