Show: Delphi C++
From XE3 API Documentation
typedef void __fastcall (__closure *TKeyEvent)(System::TObject* Sender, System::Word &Key, System::WideChar &KeyChar, System::Classes::TShiftState Shift);
A TKeyEvent event handler must be called with the following parameters:
Sender--a pointer to the object that called this function.
Key--the key on the keyboard.
KeyChbar--the character code.
Shift-- indicates which shift keys (SHIFT, CTRL, or ALT) were down when the specified key was pressed with the control in focus.