[Now Supported on Windows NT]
function translates the specified virtual-key code and keyboard state to the
corresponding Windows character or characters. The function translates the code
using the input language and physical keyboard layout identified by the given
keyboard layout handle.
| UINT uVirtKey,
||// virtual-key code
| UINT uScanCode,
||// scan code
| PBYTE lpKeyState,
||// address of key-state array
| LPWORD lpChar,
||// buffer for translated key
| UINT uFlags,
||// active-menu flag
| HKL dwhkl
||// keyboard layout handle
Specifies the virtual-key code to be translated.
Specifies the hardware scan code of the key to be translated. The high-order
bit of this value is set if the key is up (not pressed).
Points to a 256-byte array that contains the current keyboard state. Each
element (byte) in the array contains the state of one key. If the high-order bit of
a byte is set, the key is down (pressed).
The low bit, if set, indicates that the key is toggled on. In this function,
only the toggle bit of the CAPS LOCK key is relevant. The toggle state of the NUM LOCK and SCROLL LOCK keys is ignored.
Points to the buffer that will receive the translated Windows character or
Specifies whether a menu is active. This parameter must be 1 if a menu is
active, zero otherwise.
Identifies the keyboard layout to use to translate the given code. This
parameter can be any keyboard layout handle previously returned by the LoadKeyboardLayout
If the specified key is a dead key, the return value is negative. Otherwise,
it is one of the following values:
||The specified virtual key has no translation for the current state of the
|One Windows character was copied to the buffer.
|Two characters were copied to the buffer. This usually happens when a dead-key
character (accent or diacritic) stored in the keyboard layout cannot be
composed with the specified virtual key to form a single character.
The parameters supplied to the ToAsciiEx
function might not be sufficient to translate the virtual-key code, because a
previous dead key is stored in the keyboard layout.
performs the translation based on the virtual-key code. In some cases,
however, bit 15 of the uScanCode
parameter may be used to distinguish between a key press and a key release.
The scan code is used for translating ALT+number key
Although NUM LOCK is a toggle key that affects keyboard behavior, ToAsciiEx
ignores the toggle setting (the low bit) of lpKeyState
(VK_NUMLOCK, because the uVirtKey
parameter alone is sufficient to distinguish the cursor movement keys
(VK_HOME, VK_INSERT, and so on) from the numeric keys (VK_DECIMAL, VK_NUMPAD0 -
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