![]() ![]() For a code example, see the PreviewKeyDown event.įor more information about handling events, see Handling and Raising Events. Instead of overriding the IsInputKey method, you can handle the PreviewKeyDown event and set the IsInputKey property to true. The code for the override of the IsInputKey would need to determine if one of the special keys is pressed and return a value of true. Select the UltraGrid control in your toolbox and draw the control on the form. To have these keys raise the KeyDown event, you must override the IsInputKey method in each control on your form. To bind the WinGrid control to a hierarchical data source: Create a new Windows Application. ![]() Certain keys, such as the TAB, RETURN, ESC, and arrow keys are handled by controls automatically. To handle keyboard events only at the form level and not enable other controls to receive keyboard events, set the KeyPressEventArgs.Handled property in your form's KeyPress event-handling method to true. If (Control::ModifierKeys = Keys::Shift) " + vbCrLf) If shift key was pressed, it's not a number. Set the flag to true and evaluate in KeyPress event. A non-numerical keystroke was pressed. Determine whether the keystroke is a backspace. Determine whether the keystroke is a number from the keypad. Determine whether the keystroke is a number from the top of the keyboard. Void textBox1_KeyDown( Object^ /*sender*/, System::Windows::Forms::KeyEventArgs^ e ) Handle the KeyDown event to determine the type of character entered into the control. Boolean flag used to determine when a character other than a number is entered. The following code example uses the KeyDown event to determine the type of character entered into the control. public:Įvent System::Windows::Forms::KeyEventHandler ^ KeyDown public event KeyDown public event ? KeyDown member this.KeyDown : Public Custom Event KeyDown As KeyEventHandler Event Type KeyEventHandler Examples Occurs when a key is pressed while the control has focus. ![]()
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