KeyHit
int KeyHit (void);
Purpose
Indicates whether the user pressed a key on the keyboard.
KeyHit returns 1 if a keystroke is available in the keyboard buffer and returns 0 otherwise. After a keystroke is available, call GetKey to flush the keyboard buffer. Otherwise, KeyHit continues to return 1.
 |
Note KeyHit detects keystrokes only in the console window of a console application. The function does not detect keystrokes in windows you create with the User Interface Library.
(Linux) KeyHit detects keystrokes only in the Standard I/O window. You must first call the SetStdioPort function to specify to use the Standard I/O window. |
KeyHit brings the Standard Input/Output window to the front.
Example Code
/* Flush any pending keystrokes. */
while (KeyHit())
GetKey();
/* Perform loop indefinitely until the user presses key. */
while (!KeyHit()) {
}
Parameters
None.
Return Value
| Name | Type | Description | ||||||
| keyHit | int | Indicates if a key has been pressed.
|
Additional Information
Library: Utility Library
Include file: utility.h
LabWindows/CVI compatibility: LabWindows/CVI 3.0 and later