API -> GetAsyncKeyState [ Library : user32.dll, Category : Keyboard ] [C#, VB, VB.net]

GetAsyncKeyState

Library : user32.dll Category : Keyboard

Api Example(s)
Create colorful Command Buttons
The status of mouse buttons
The status of shift keys
DragControl - Drag any control using the mouse
KeysPressed - Test the status of up to three keys
IsKeyPressed - Check whether a key is pressed
Give user ability to interrupt loop
How to detect system activity for mouse and keyboard
This is a link to different site Enabling Mouse Gestures with a WH_MOUSE hook
Detecting Mouse XButton Clicks
How to detect or block system wide keypress event (using subclassing)?

API Description :

The GetAsyncKeyState function determines whether a key is up or down at the time the function is called, and whether the key was pressed after a previous call to GetAsyncKeyState.

VB Declaration :

Show Multiline Public Private

Declare Function GetAsyncKeyState Lib "user32" (ByVaL vKey As Long) As Integer

Parameters :

· vKey
Specifies one of 256 possible virtual-key codes.
Windows NT: You can use left- and right-distinguishing constants to specify certain keys. See the Remarks section for further information.
Windows 95: Windows 95 does not support the left- and rig

Return :

If the function succeeds, the return value specifies whether the key was pressed since the last call to GetAsyncKeyState, and whether the key is currently up or down. If the most significant bit is set, the key is down, and if the least significant bit is

OS Requirement :

Requires Windows NT 3.1 or later
Requires Windows 95 or later

Dotnet Replacement :