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Overview |
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Group |
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Quick Info
Windows NT
| Yes
| Win95
| Yes
| Win32s
| Yes
| Import Library
| user32.lib
| Header File
| winuser.h
| Unicode
| WinNT
| Platform Notes
| None
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MapVirtualKey
The MapVirtualKey function translates (maps) a virtual-key code into a scan code or character
value, or translates a scan code into a virtual-key code.
UINT MapVirtualKey(
UINT uCode,
| // virtual-key code or scan code
| UINT uMapType
| // translation to perform
| );
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Parameters
uCode
Specifies the virtual-key code or scan code for a key. How this value is
interpreted depends on the value of the uMapType parameter.
uMapType
Specifies the translation to perform. The value of this parameter depends on
the value of the uCode parameter:
Value
| Meaning
| 0
| uCode is a virtual-key code and is translated into a scan code. If it is a
virtual-key code that does not distinguish between left- and right-hand keys, the
left-hand scan code is returned. If there is no translation, the function returns 0.
| -
| uCode is a scan code and is translated into a virtual-key code that does not
distinguish between left- and right-hand keys. If there is no translation, the
function returns 0.
| -
| uCode is a virtual-key code and is translated into an unshifted character value in
the low-order word of the return value. Dead keys (diacritics) are indicated by
setting the top bit of the return value. If there is no translation, the
function returns 0.
| -
| uCode is a scan code and is translated into a virtual-key code that distinguishes
between left- and right-hand keys. If there is no translation, the function
returns 0.
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Return Values
The return value is either a scan code, a virtual-key code, or a character
value, depending on the value of uCode and uMapType. If there is no translation, the return value is zero.
Remarks
An application can use MapVirtualKey to translate scan codes to the virtual-key code constants VK_SHIFT,
VK_CONTROL, and VK_MENU, and vice versa. These translations do not distinguish between
the left and right instances of the SHIFT, CTRL, or ALT keys. An application can get the scan code corresponding to the left or right
instance of one of these keys by calling MapVirtualKey with uCode set to one of the following virtual-key code constants:
VK_LSHIFT
| VK_RSHIFT
| VK_LCONTROL
| VK_RCONTROL
| VK_LMENU
| VK_RMENU
|
These left- and right-distinguishing constants are available to an application
only through the GetKeyboardState, SetKeyboardState, GetAsyncKeyState, GetKeyState, and MapVirtualKey functions.
See Also
GetAsyncKeyState, GetKeyboardState, GetKeyState, SetKeyboardState
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