KeybdEventCallback

This function is a prototype of the callback function passed to the KeybdDriverInitialize function.

Syntax

void KeybdEventCallback( UINT32 VirtualKey,
KEY_STATE_FLAGS KeyEvent );

Parameters

VirtualKey

Specifies code for the virtual key/event.

KeyEvent

Specifies the KeyStateDownFlag being set or cleared.

Remarks

The keyboard driver does not implement this function. This is the prototype of this function passed into the driver by the user input system when it calls the KeybdDriverInitialize function. The driver calls the callback function whenever there is a keyboard event.

The KeyStateDownFlag field in the KeyEvent parameter is set for a key-down event and clear for a key-up event. All other bits must be 0. The VirtualKey parameter has more than just the virtual key information. See the Keybddr.h header file for a description of the information in this parameter.

When a keyboard is connected or disconnected, an event must be signaled with the appropriate connect-event code or disconnect-event code set in the VirtualKey parameter.

This function prototype is declared in the Keybddr.h header file.

See Also

KeybdDriverInitialize