Form Events (System.Windows.Forms)

This page is specific to

Microsoft Visual Studio 2010/.NET Framework 4

Other versions are also available for the following:

.NET Framework Class Library

Form Events

The Form type exposes the following members.

Events

	Name	Description
	Activated	Occurs when the form is activated in code or by the user.
	AutoSizeChanged	Occurs when the AutoSize property changes.
	AutoValidateChanged	Occurs when the AutoValidate property changes.
	BackColorChanged	Occurs when the value of the BackColor property changes. (Inherited from Control.)
	BackgroundImageChanged	Occurs when the value of the BackgroundImage property changes. (Inherited from Control.)
	BackgroundImageLayoutChanged	Occurs when the BackgroundImageLayout property changes. (Inherited from Control.)
	BindingContextChanged	Occurs when the value of the BindingContext property changes. (Inherited from Control.)
	CausesValidationChanged	Occurs when the value of the CausesValidation property changes. (Inherited from Control.)
	ChangeUICues	Occurs when the focus or keyboard user interface (UI) cues change. (Inherited from Control.)
	Click	Occurs when the control is clicked. (Inherited from Control.)
	ClientSizeChanged	Occurs when the value of the ClientSize property changes. (Inherited from Control.)
	Closed	Occurs when the form is closed.
	Closing	Occurs when the form is closing.
	ContextMenuChanged	Occurs when the value of the ContextMenu property changes. (Inherited from Control.)
	ContextMenuStripChanged	Occurs when the value of the ContextMenuStrip property changes. (Inherited from Control.)
	ControlAdded	Occurs when a new control is added to the Control..::.ControlCollection. (Inherited from Control.)
	ControlRemoved	Occurs when a control is removed from the Control..::.ControlCollection. (Inherited from Control.)
	CursorChanged	Occurs when the value of the Cursor property changes. (Inherited from Control.)
	Deactivate	Occurs when the form loses focus and is no longer the active form.
	Disposed	Occurs when the component is disposed by a call to the Dispose method. (Inherited from Component.)
	DockChanged	Occurs when the value of the Dock property changes. (Inherited from Control.)
	DoubleClick	Occurs when the control is double-clicked. (Inherited from Control.)
	DragDrop	Occurs when a drag-and-drop operation is completed. (Inherited from Control.)
	DragEnter	Occurs when an object is dragged into the control's bounds. (Inherited from Control.)
	DragLeave	Occurs when an object is dragged out of the control's bounds. (Inherited from Control.)
	DragOver	Occurs when an object is dragged over the control's bounds. (Inherited from Control.)
	EnabledChanged	Occurs when the Enabled property value has changed. (Inherited from Control.)
	Enter	Occurs when the control is entered. (Inherited from Control.)
	FontChanged	Occurs when the Font property value changes. (Inherited from Control.)
	ForeColorChanged	Occurs when the ForeColor property value changes. (Inherited from Control.)
	FormClosed	Occurs after the form is closed.
	FormClosing	Occurs before the form is closed.
	GiveFeedback	Occurs during a drag operation. (Inherited from Control.)
	GotFocus	Occurs when the control receives focus. (Inherited from Control.)
	HandleCreated	Occurs when a handle is created for the control. (Inherited from Control.)
	HandleDestroyed	Occurs when the control's handle is in the process of being destroyed. (Inherited from Control.)
	HelpButtonClicked	Occurs when the Help button is clicked.
	HelpRequested	Occurs when the user requests help for a control. (Inherited from Control.)
	ImeModeChanged	Occurs when the ImeMode property has changed. (Inherited from Control.)
	InputLanguageChanged	Occurs after the input language of the form has changed.
	InputLanguageChanging	Occurs when the user attempts to change the input language for the form.
	Invalidated	Occurs when a control's display requires redrawing. (Inherited from Control.)
	KeyDown	Occurs when a key is pressed while the control has focus. (Inherited from Control.)
	KeyPress	Occurs when a key is pressed while the control has focus. (Inherited from Control.)
	KeyUp	Occurs when a key is released while the control has focus. (Inherited from Control.)
	Layout	Occurs when a control should reposition its child controls. (Inherited from Control.)
	Leave	Occurs when the input focus leaves the control. (Inherited from Control.)
	Load	Occurs before a form is displayed for the first time.
	LocationChanged	Occurs when the Location property value has changed. (Inherited from Control.)
	LostFocus	Occurs when the control loses focus. (Inherited from Control.)
	MarginChanged	Occurs when the Margin property changes.
	MaximizedBoundsChanged	Occurs when the value of the MaximizedBounds property has changed.
	MaximumSizeChanged	Occurs when the value of the MaximumSize property has changed.
	MdiChildActivate	Occurs when a multiple-document interface (MDI) child form is activated or closed within an MDI application.
	MenuComplete	Occurs when the menu of a form loses focus.
	MenuStart	Occurs when the menu of a form receives focus.
	MinimumSizeChanged	Occurs when the value of the MinimumSize property has changed.
	MouseCaptureChanged	Occurs when the control loses mouse capture. (Inherited from Control.)
	MouseClick	Occurs when the control is clicked by the mouse. (Inherited from Control.)
	MouseDoubleClick	Occurs when the control is double clicked by the mouse. (Inherited from Control.)
	MouseDown	Occurs when the mouse pointer is over the control and a mouse button is pressed. (Inherited from Control.)
	MouseEnter	Occurs when the mouse pointer enters the control. (Inherited from Control.)
	MouseHover	Occurs when the mouse pointer rests on the control. (Inherited from Control.)
	MouseLeave	Occurs when the mouse pointer leaves the control. (Inherited from Control.)
	MouseMove	Occurs when the mouse pointer is moved over the control. (Inherited from Control.)
	MouseUp	Occurs when the mouse pointer is over the control and a mouse button is released. (Inherited from Control.)
	MouseWheel	Occurs when the mouse wheel moves while the control has focus. (Inherited from Control.)
	Move	Occurs when the control is moved. (Inherited from Control.)
	PaddingChanged	Occurs when the control's padding changes. (Inherited from Control.)
	Paint	Occurs when the control is redrawn. (Inherited from Control.)
	ParentChanged	Occurs when the Parent property value changes. (Inherited from Control.)
	PreviewKeyDown	Occurs before the KeyDown event when a key is pressed while focus is on this control. (Inherited from Control.)
	QueryAccessibilityHelp	Occurs when AccessibleObject is providing help to accessibility applications. (Inherited from Control.)
	QueryContinueDrag	Occurs during a drag-and-drop operation and enables the drag source to determine whether the drag-and-drop operation should be canceled. (Inherited from Control.)
	RegionChanged	Occurs when the value of the Region property changes. (Inherited from Control.)
	Resize	Occurs when the control is resized. (Inherited from Control.)
	ResizeBegin	Occurs when a form enters resizing mode.
	ResizeEnd	Occurs when a form exits resizing mode.
	RightToLeftChanged	Occurs when the RightToLeft property value changes. (Inherited from Control.)
	RightToLeftLayoutChanged	Occurs after the value of the RightToLeftLayout property changes.
	Scroll	Occurs when the user or code scrolls through the client area. (Inherited from ScrollableControl.)
	Shown	Occurs whenever the form is first displayed.
	SizeChanged	Occurs when the Size property value changes. (Inherited from Control.)
	StyleChanged	Occurs when the control style changes. (Inherited from Control.)
	SystemColorsChanged	Occurs when the system colors change. (Inherited from Control.)
	TabIndexChanged	Infrastructure. Occurs when the value of the TabIndex property changes.
	TabStopChanged	Occurs when the TabStop property changes.
	TextChanged	Occurs when the Text property value changes. (Inherited from Control.)
	Validated	Occurs when the control is finished validating. (Inherited from Control.)
	Validating	Occurs when the control is validating. (Inherited from Control.)
	VisibleChanged	Occurs when the Visible property value changes. (Inherited from Control.)

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Reference

Form Class

System.Windows.Forms Namespace