Description: | Generated when a key is pressed and passed to the control that has the focus. The KeyPress and KeyUp events are usually generated after the KeyDown event. If a key is pressed and kept depressed, multiple KeyDown and KeyPress events are generated before a KeyUp event. Note that if you press a toggle key (e.g. Caps Lock, Num Lock): The order of events may be changed. One of these events may not be generated. To support special keystrokes, such as short-cuts, on the form, see the PreKeyDown event. |
TreeView and
ListView | KeyDown events are not generated when a label is being edited. |
Others | Event is not generated in the following cases: When the Tab key is pressed. When an access (mnemonic) key is pressed. When an arrow key is pressed.
Note that if a control, which uses arrow keys (e.g. ComboBox control, ScrollBar control), has the focus, the KeyDown and KeyUp events are generated. When a function key, which was defined in the CommandButton property page, is pressed. When a short-cut key, which was defined in the MenuItem property page, is pressed. If the form contains the following controls, when the ENTER key is pressed: A control, which has focus, does not use ENTER key
(e.g. Table control, a TextBox control whose MultiLine property is True, use the ENTER key.) A CommandButton control, whose Default property is True, has the focus.
If there are following controls on the form, when ESCAPE key is pressed: The control, which has focus, does not use ESCAPE key. CommandButton control, whose Cancel property is True.
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Used in controls: | CheckBox ComboBox CommandButton DriveList | Edit FileList FolderList ListBox | ListView OptionButton ScrollBar Slider | Tab Table TextBox TreeView |
Used in objects: | Form | |
Parameters: | 1. [VT_I4 - Index S9(9) COMP-5] 2. VT_I2 - KeyCode S9(4) COMP-5 3. VT_I2 - ShiftState S9(4) COMP-5 |
Description of parameters: | Index: When the control is part of an array, Index contains the control's index in the array. KeyCode: The key code that was pressed. See Key Code Constants for details of key codes. ShiftState: Bit mask settings indicate the state of each of the shift keys - Shift, Ctrl and ALT. Numbering the bits 1 to 8, from least significant to most significant, the bit mapping is:
1 - Shift key(POW-SHIFTSTATE-SHIFT)
2 - Ctrl key(POW-SHIFTSTATE-CTRL)
3 - Alt key(POW-SHIFTSTATE-ALT)
For example if the parameter has a value of 6 (binary 00000110), this indicates that the Ctl and Alt keys are depressed.
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