| Type | Description | ||
| KeyCode as Integer | An integer that represent the key code | |||
| Shift as Integer | An integer that corresponds to the state of the SHIFT, CTRL, and ALT keys at the time of the event. The shift argument is a bit field with the least-significant bits corresponding to the SHIFT key (bit 0), the CTRL key (bit 1), and the ALT key (bit 2). These bits correspond to the values 1, 2, and 4, respectively. Some, all, or none of the bits can be set, indicating that some, all, or none of the keys are pressed. For example, if both CTRL and ALT are pressed, the value of shift is 6. |
Use KeyDown and KeyUp
event procedures if you need to respond to both the pressing and releasing of
a key. You test for a condition by first assigning each result to a temporary
integer variable and then comparing shift to a bit mask. The control fires the
SelectItem event when the
user presses the ENTER key, if the ShowFocusRect
property is True. If the group's caption has the focus, the control fires the BeforeExpandGroup
and ExpandGroup event when
user presses the ENTER key. Use the And operator
with the shift argument to test whether the condition is greater than 0,
indicating that the modifier was pressed, as in this example:
ShiftDown = (Shift And 1) > 0
CtrlDown = (Shift And 2) > 0
AltDown = (Shift And 4) > 0
In a procedure, you can test for any combination of conditions, as in this
example:
If AltDown And CtrlDown Then