VIRTUAL KEY CODES CODE

/ These left- and right-distinguishing constants are only available when you call the GetKeyboardState, SetKeyboardState, GetAsyncKeyState, GetKeyState, and MapVirtualKey functions.The search returns topics that contain terms you enter.

VIRTUAL KEY CODES CODE

/ Windows NT/2000/XP: You can use the following virtual-key code constants as values for vKey to distinguish between the left and right instances of those keys. This gives the state of the SHIFT, CTRL, or ALT keys without distinguishing between left and right. / You can use the virtual-key code constants VK_SHIFT, VK_CONTROL, and VK_MENU as values for the vKey parameter. The behavior of the least significant bit of the return value is retained strictly for compatibility with 16-bit Windows applications (which are non-preemptive) and should not be relied upon. / Although the least significant bit of the return value indicates whether the key has been pressed since the last query, due to the pre-emptive multitasking nature of Windows, another application can call GetAsyncKeyState and receive the 'recently pressed' bit instead of your application. / Copy CodeGetSystemMetrics(SM_SWAPBUTTON) which returns TRUE if the mouse buttons have been swapped. You can determine the system's current mapping of physical mouse buttons to logical mouse buttons by calling For example, the call GetAsyncKeyState(VK_LBUTTON) always returns the state of the left physical mouse button, regardless of whether it is mapped to the left or right logical mouse button. However, it checks on the state of the physical mouse buttons, not on the logical mouse buttons that the physical buttons are mapped to. / The GetAsyncKeyState function works with mouse buttons.

/ true if the key is down otherwise, false. / Determines whether a key is up or down at the time the function is called by calling the GetAsyncKeyState function. Int16 result = GetKeyState((UInt16)ke圜ode) Public static bool IsTogglingKeyInEffect(VirtualKey ke圜ode) / These left- and right-distinguishing constants are available to an application only through the GetKeyboardState, SetKeyboardState, GetAsyncKeyState, GetKeyState, and MapVirtualKey functions. An application can also use the following virtual-key code constants as values for nVirtKey to distinguish between the left and right instances of those keys. This gives the status of the SHIFT, CTRL, or ALT keys without distinguishing between left and right. / An application can use the virtual-key code constants VK_SHIFT, VK_CONTROL, and VK_MENU as values for the nVirtKey parameter. / To retrieve state information for all the virtual keys, use the GetKeyboardState function. This function retrieves the state of the key when the input message was generated. / An application calls GetKeyState in response to a keyboard-input message. Use the GetAsyncKeyState function to retrieve that information.

The status does not reflect the interrupt-level state associated with the hardware. / The key status returned from this function changes as a thread reads key messages from its message queue. / true if the toggling key is toggled on (in-effect) otherwise, false. / Determines whether the toggling key is toggled on (in-effect) or not by calling the GetKeyState function.

Virtual key codes