TextBox.ProcessCmdKey(Message, Keys) Method

Definition

Namespace:

System.Windows.Forms

Assembly:

System.Windows.Forms.dll

Processes a command key.

protected:
 override bool ProcessCmdKey(System::Windows::Forms::Message % m, System::Windows::Forms::Keys keyData);

protected override bool ProcessCmdKey (ref System.Windows.Forms.Message m, System.Windows.Forms.Keys keyData);

override this.ProcessCmdKey : Message * System.Windows.Forms.Keys -> bool

Protected Overrides Function ProcessCmdKey (ByRef m As Message, keyData As Keys) As Boolean

Parameters

m

Message

A Message, passed by reference that represents the window message to process.

keyData

Keys

One of the Keys values that represents the shortcut key to process.

Returns

Boolean

true if the command key was processed by the control; otherwise, false.

Remarks

New in 4.6.1. In previous versions, the Ctrl+A shortcut key in a TextBox failed to select all text when the ShortcutsEnabled and Multiline properties were both set to true.. This method enables the Ctrl-A shortcut key to select all text when the ShortcutsEnabled and Multiline properties are both set to true.

Applications targeting .NET Framework versions 4.0 through 4.6 can take advantage of this method by adding the following to the <runtime> section of the app.config file:

<AppContextSwitchOverrides value = "Switch.System.Windows.Forms.DoNotSupportSelectAllShortcutInMultilineTextBox=false" />

Applications targeting .NET Framework versions 4.6.1 or newer can opt out of this behavior by adding the following to the <runtime> section of the app.config file:

<AppContextSwitchOverrides value = "Switch.System.Windows.Forms.DoNotSupportSelectAllShortcutInMultilineTextBox=true" />

Note

If the app.config file already contains an AppContextSwitchOverrides key, merge the new key value into the existing key. For example, <AppContextSwitchOverrides value = "oldKey=oldValue;Switch.System.Windows.Forms.DoNotSupportSelectAllShortcutInMultilineTextBox=false" />.