Unit: WebCtrls

TKeyUpEvent = procedure (Sender: TObject; Key: Integer; ShiftKey,
       CtrlKey, AltKey: Boolean) of object

Available In: Client and Server Applications

The TKeyUpEvent type is a common event type that is used by controls to provide notification that a key is being released.

The Sender parameter represents the class instance that triggered the event. The Key parameter represents the ordinal key code of the key pressed, and the ShiftKey, CtrlKey, AltKey parameters represent whether the Shift, Control, and/or Alt keys were also pressed.

The Key value may represent a virtual key code. Certain keys, such as the Insert, Delete, and navigation keys, use virtual key codes since these keys do not correspond to an ordinal Unicode character value. The following virtual key code constants are defined in the WebUI unit for your convenience:

VK_BACK = 8;
VK_TAB = 9;
VK_RETURN = 13;
VK_ESCAPE = 27;
VK_SPACE = 32;
VK_PRIOR = 33;
VK_NEXT = 34;
VK_END = 35;
VK_HOME = 36;
VK_LEFT = 37;
VK_UP = 38;
VK_RIGHT = 39;
VK_DOWN = 40;
VK_INSERT = 45;
VK_DELETE = 46;