Releasing Keyboard Key

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Hey,

Does anyone know how can I use the Keybd_event function:

Declare Function keybd_event Lib "user32" Alias "keybd_event" ( _
ByVal bVk As Byte, ByVal bScan As Byte, _
ByVal dwFlags As Long, ByVal dwExtraInfo As Long) As Long

When I use it I get the error:

A call to PInvoke function 'test!test.Form1::keybd_event' has unbalanced the stack. This is likely because the managed PInvoke signature does not match the unmanaged target signature. Check that the calling convention and parameters of the PInvoke signature match the target unmanaged signature.

Any Help?

Posted 19-Oct-13 5:18am

Hadi Ayash

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2 solutions

Solution 1

Here is a good example:

http://pinvoke.net/default.aspx/user32/keybd_event.html[^]

PInvoke.net[^] is a great resource when doing windows API calls.

Posted 19-Oct-13 5:31am

Ron Beyer

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Sergey Alexandrovich Kryukov 19-Oct-13 21:34pm

My 5, but this function has been superseded and its use is not recommended. I suggested appropriate alternative in my answer, please see.
—SA

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Sergey Alexandrovich Kryukov · Accepted Answer · 2013-10-19T15:32:00

Using the function keybd_event is not recommended, as it has been superseded with SendInput. Please see:
http://msdn.microsoft.com/en-us/library/windows/desktop/ms646304%28v=vs.85%29.aspx[^],
http://msdn.microsoft.com/en-us/library/windows/desktop/ms646310(v=vs.85).aspx[^].

This is the information of P/Invoke use of it: http://www.pinvoke.net/default.aspx/user32.sendinput[^].

—SA