有人可以告诉我如何在vb.net中发送快捷键吗？快捷键是{LEFTWIN} + {ADD} amd {LEFTWIN} + {SUBTRACT}。尝试SendKeys.Send它不起作用。
答案 0 :(得分：2)
LWin无法发送SendKeys.Send()。为此，您必须P / Invoke WinAPI的SendInput() function。
这是我为此目的创建的包装类：
Imports System.Runtime.InteropServices
Public NotInheritable Class InputHelper
Private Sub New()
End Sub
#Region "Methods"
#Region "PressKey()"
''' <summary>
''' Virtually presses a key.
''' </summary>
''' <param name="Key">The key to press.</param>
''' <param name="HardwareKey">Whether or not to press the key using its hardware scan code.</param>
''' <remarks></remarks>
Public Shared Sub PressKey(ByVal Key As Keys, Optional ByVal HardwareKey As Boolean = False)
If HardwareKey = False Then
InputHelper.SetKeyState(Key, False)
InputHelper.SetKeyState(Key, True)
Else
InputHelper.SetHardwareKeyState(Key, False)
InputHelper.SetHardwareKeyState(Key, True)
End If
End Sub
#End Region
#Region "SetKeyState()"
''' <summary>
''' Virtually sends a key event.
''' </summary>
''' <param name="Key">The key of the event to send.</param>
''' <param name="KeyUp">Whether to push down or release the key.</param>
''' <remarks></remarks>
Public Shared Sub SetKeyState(ByVal Key As Keys, ByVal KeyUp As Boolean)
Key = ReplaceBadKeys(Key)
Dim KeyboardInput As New KEYBDINPUT With {
.wVk = Key,
.wScan = 0,
.time = 0,
.dwFlags = If(KeyUp, KEYEVENTF.KEYUP, 0),
.dwExtraInfo = IntPtr.Zero
}
Dim Union As New INPUTUNION With {.ki = KeyboardInput}
Dim Input As New INPUT With {
.type = INPUTTYPE.KEYBOARD,
.U = Union
}
SendInput(1, New INPUT() {Input}, Marshal.SizeOf(GetType(INPUT)))
End Sub
#End Region
#Region "SetHardwareKeyState()"
''' <summary>
''' Virtually sends a key event using the key's scan code.
''' </summary>
''' <param name="Key">The key of the event to send.</param>
''' <param name="KeyUp">Whether to push down or release the key.</param>
''' <remarks></remarks>
Public Shared Sub SetHardwareKeyState(ByVal Key As Keys, ByVal KeyUp As Boolean)
Key = ReplaceBadKeys(Key)
Dim KeyboardInput As New KEYBDINPUT With {
.wVk = 0,
.wScan = MapVirtualKeyEx(CUInt(Key), 0, GetKeyboardLayout(0)),
.time = 0,
.dwFlags = KEYEVENTF.SCANCODE Or If(KeyUp, KEYEVENTF.KEYUP, 0),
.dwExtraInfo = IntPtr.Zero
}
Dim Union As New INPUTUNION With {.ki = KeyboardInput}
Dim Input As New INPUT With {
.type = INPUTTYPE.KEYBOARD,
.U = Union
}
SendInput(1, New INPUT() {Input}, Marshal.SizeOf(GetType(INPUT)))
End Sub
#End Region
#Region "ReplaceBadKeys()"
''' <summary>
''' Replaces bad keys with their corresponding VK_* value.
''' </summary>
''' <remarks></remarks>
Private Shared Function ReplaceBadKeys(ByVal Key As Keys) As Keys
Dim ReturnValue As Keys = Key
If ReturnValue.HasFlag(Keys.Control) Then
ReturnValue = (ReturnValue And Not Keys.Control) Or Keys.ControlKey 'Replace Keys.Control with Keys.ControlKey.
End If
If ReturnValue.HasFlag(Keys.Shift) Then
ReturnValue = (ReturnValue And Not Keys.Shift) Or Keys.ShiftKey 'Replace Keys.Shift with Keys.ShiftKey.
End If
If ReturnValue.HasFlag(Keys.Alt) Then
ReturnValue = (ReturnValue And Not Keys.Alt) Or Keys.Menu 'Replace Keys.Alt with Keys.Menu.
End If
Return ReturnValue
End Function
#End Region
#End Region
#Region "WinAPI P/Invokes"
<DllImport("user32.dll", SetLastError:=True)>
Private Shared Function SendInput(ByVal nInputs As UInteger, <MarshalAs(UnmanagedType.LPArray)> ByVal pInputs() As INPUT, ByVal cbSize As Integer) As UInteger
End Function
<DllImport("user32.dll")> _
Private Shared Function MapVirtualKeyEx(uCode As UInteger, uMapType As UInteger, dwhkl As IntPtr) As UInteger
End Function
<DllImport("user32.dll")> _
Private Shared Function GetKeyboardLayout(idThread As UInteger) As IntPtr
End Function
#Region "Enumerations"
Private Enum INPUTTYPE As UInteger
MOUSE = 0
KEYBOARD = 1
HARDWARE = 2
End Enum
<Flags()> _
Private Enum KEYEVENTF As UInteger
EXTENDEDKEY = &H1
KEYUP = &H2
SCANCODE = &H8
UNICODE = &H4
End Enum
#End Region
#Region "Structures"
<StructLayout(LayoutKind.Explicit)> _
Private Structure INPUTUNION
<FieldOffset(0)> Public mi As MOUSEINPUT
<FieldOffset(0)> Public ki As KEYBDINPUT
<FieldOffset(0)> Public hi As HARDWAREINPUT
End Structure
Private Structure INPUT
Public type As Integer
Public U As INPUTUNION
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 UShort
Public wScan As Short
Public dwFlags As UInteger
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
#End Region
#End Region
End Class
以下是您使用它的方式：
InputHelper.SetKeyState(Keys.LWin, False) 'Hold LWin.
InputHelper.PressKey(Keys.Add) 'Press the ADD key.
InputHelper.SetKeyState(Keys.LWin, True) 'Release LWin.
答案 1 :(得分：1)
最后这对我有用：）
Private Declare Sub keybd_event Lib "user32.dll" (ByVal bVk As IntPtr, ByVal bScan As IntPtr, ByVal dwFlags As IntPtr, ByVal dwExtraInfo As IntPtr)
Private Const VK_STARTKEY = &H5B
Private Const VK_SUBTRACT = &H6D
Private Const VK_ADD = &H6B
Private Const VK_ESCAPE = &H1B
Private Const KEYEVENTF_KEYUP = &H2
Private Const KEYEVENTF_KEYDOWN = &H
Call keybd_event(VK_STARTKEY, 0, KEYEVENTF_KEYDOWN, 0)
Call keybd_event(VK_ADD, 0, KEYEVENTF_KEYDOWN, 0)
Call keybd_event(VK_ADD, 0, KEYEVENTF_KEYUP, 0)
Call keybd_event(VK_STARTKEY, 0, KEYEVENTF_KEYUP, 0)
编辑 不推荐使用keybd_event，因此我将转向SendInput（）。第一种解决方案最适合我： - ）
答案 2 :(得分：-4)
你说你试过
coord_fixed正确的是
SendKeys.Sned("KEY")
除此之外，你用“Leftwin”指的是什么键？
很抱歉，我从未使用过Sendkeys，而且我知道Winkey的“LWIN”......
顺便说一句，尝试使用
SendKeys.Send("KEY")
SendKeys发送字符串，所以这个SendKeys.Send（Keys.LWin）实际上应该发送Keys.LWin的代码