My curse seems to be SendInput... I have tried many sites and code variations and it never works right... it always returns an error. So can someone just whip together a quick class that has 3 public methods, one for keyboard (that takes a Keys data type) one for mouse, and one for Hardware? Please don't link me to anything, I've tried so many sites that my head's spinning.

What are you using it for?

This is now irritating me as well.

Spent 2 hours on it and can't get it to work either.

It's not sending back an error code but doesn't do anything.

Post what you find out and I will as well.

Whoa Dude, It just worked.

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        'raises the mouse down and mouse up events

        Dim Inpt As INPUT
        Inpt.mi.dwFlags = &H2

        Dim Inpt2 As INPUT
        Inpt2.mi.dwFlags = &H4

        Dim Inpts(1) As INPUT
        Inpts(0) = Inpt
        Inpts(1) = Inpt2

        SendInput(2, Inpts, System.Runtime.InteropServices.Marshal.SizeOf(Inpt))

    End Sub

Structs and Functions

<System.Runtime.InteropServices.DllImport("user32.dll")> _
   Friend Function SendInput( _
         ByVal nInputs As Integer, _
         ByVal pInputs() As INPUT, _
         ByVal cbSize As Integer) As Integer
    End Function

    <StructLayout(LayoutKind.Explicit)> _
   Public Structure INPUT
        'Field offset 32 bit machine 4
        '64 bit machine 8
        <FieldOffset(0)> _
        Public type As Integer
        <FieldOffset(8)> _
        Public mi As MOUSEINPUT
        <FieldOffset(8)> _
        Public ki As KEYBDINPUT
        <FieldOffset(8)> _
        Public hi As HARDWAREINPUT
    End Structure

    Public Structure MOUSEINPUT
        Public dx As Integer
        Public dy As Integer
        Public mouseData As Integer
        Public dwFlags As Integer
        Public time As Integer
        Public dwExtraInfo As IntPtr
    End Structure

    Public Structure KEYBDINPUT
        Public wVk As Short
        Public wScan As Short
        Public dwFlags As Integer
        Public time As Integer
        Public dwExtraInfo As IntPtr
    End Structure

    Public Structure HARDWAREINPUT
        Public uMsg As Integer
        Public wParamL As Short
        Public wParamH As Short
    End Structure
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        'raises the key down and up events

        Dim Inpts(1) As INPUT

        'key down
        Inpts(0).type = 1
        Inpts(0).ki.wVk = Convert.ToInt16(CChar("J"))
        Inpts(0).ki.dwFlags = 0

        'key up
        Inpts(1).type = 1
        Inpts(1).ki.wVk = Convert.ToInt16(CChar("J"))
        Inpts(1).ki.dwFlags = 2

        SendInput(2, Inpts, Marshal.SizeOf(GetType(INPUT)))
    End Sub

Heres a start of a class you want.

Usage:

SendInputs.SendKey("A")

Hope This Helps

Imports System.Runtime.InteropServices

Public Class SendInputs

    Private Const KeyDown As Integer = &H0
    Private Const KeyUp As Integer = &H2

    <DllImport("user32.dll")> _
  Private Shared Function SendInput( _
        ByVal nInputs As Integer, _
        ByVal pInputs() As INPUT, _
        ByVal cbSize As Integer) As Integer
    End Function

    <StructLayout(LayoutKind.Explicit)> _
   Private Structure INPUT
        'Field offset 32 bit machine 4
        '64 bit machine 8
        <FieldOffset(0)> _
        Public type As Integer
        <FieldOffset(8)> _
        Public mi As MOUSEINPUT
        <FieldOffset(8)> _
        Public ki As KEYBDINPUT
        <FieldOffset(8)> _
        Public hi As HARDWAREINPUT
    End Structure

    Private Structure MOUSEINPUT
        Public dx As Integer
        Public dy As Integer
        Public mouseData As Integer
        Public dwFlags As Integer
        Public time As Integer
        Public dwExtraInfo As IntPtr
    End Structure

    Private Structure KEYBDINPUT
        Public wVk As Short
        Public wScan As Short
        Public dwFlags As Integer
        Public time As Integer
        Public dwExtraInfo As IntPtr
    End Structure

    Private Structure HARDWAREINPUT
        Public uMsg As Integer
        Public wParamL As Short
        Public wParamH As Short
    End Structure

      Public Shared Sub SendKey(ByVal key As Char)
        Dim Inpts(1) As INPUT

        'key down
        Inpts(0).type = 1
        Inpts(0).ki.wVk = Convert.ToInt16(CChar(key))
        Inpts(0).ki.dwFlags = KeyDown

        'key up
        Inpts(1).type = 1
        Inpts(1).ki.wVk = Convert.ToInt16(CChar(key))
        Inpts(1).ki.dwFlags = KeyUp

        SendInput(2, Inpts, Marshal.SizeOf(GetType(INPUT)))
    End Sub
End Class

Edited 5 Years Ago by Unhnd_Exception: n/a

And Thanks for the thread.

Will be using that in the future I'm sure.

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