Occurs before a form is displayed for the first time.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
You can use this event to perform tasks such as allocating resources used by the form.
For more information about handling events, see Consuming Events.
The following code example demonstrates how to use the SetDesktopLocation, , Activated, and Activate members. To run the example, paste the following code in a form called Form1 containing a Button called Button1 and two Label controls called Label1 and Label2.
Shared x As Integer = 200 Shared y As Integer = 200 Private Sub Button1_Click(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles Button1.Click ' Create a new Form1 and set its Visible property to true. Dim form2 As New Form1 form2.Visible = True ' Set the new form's desktop location so it appears below and ' to the right of the current form. form2.SetDesktopLocation(x, y) x += 30 y += 30 ' Keep the current form active by calling the Activate method. Me.Activate() Me.Button1.Enabled = False End Sub ' Updates the label text to reflect the current values of x and y, ' which was were incremented in the Button1 control's click event. Private Sub Form1_Activated(ByVal sender As Object, _ ByVal e As System.EventArgs) Handles MyBase.Activated Label1.Text = "x: " & x & " y: " & y Label2.Text = "Number of forms currently open: " & count End Sub Shared count As Integer = 0 Private Sub Form1_Closed(ByVal sender As Object, _ ByVal e As System.EventArgs) Handles MyBase.Closed count -= 1 End Sub Private Sub Form1_Load(ByVal sender As Object, _ ByVal e As System.EventArgs) Handles MyBase.Load count += 1 End Sub
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.