代码的作用: 我有一个代码,可以在屏幕上移动鼠标,获取打印屏幕并将其粘贴到 excel。

问题: 由于某种原因,我的代码总是(绝对没有异常(exception))在每次运行后关闭 NUMLOCK 键。

到目前为止我尝试过的: 我四处搜索并找到了 SendKeys (NUMLOCK),它在理论上是有效的(尽管它对用户来说似乎很成问题)。

我想做什么: 我想在每次宏运行后打开 NUMLOCK,

Obs1: 我不知道是什么导致宏首先将其关闭。修复导致此问题的任何内容将是理想的,但由于我不知道问题是什么,我首先想让我的代码正常工作。我将尽快找到打开 NUMLOCK 键的方法。

问题: 我可以使用 SendKeys 执行此操作吗?我是否正确使用它?有没有更好的办法?

Obs2:因为它是一个更大的代码,所以一旦解决了这个问题,我将发布另一个问题以及整个代码,并讨论导致问题的原因。

代码 我试图起诉打开 numlock:

Application.Sendkeys (NUMLOCK)

还试过:
Application.Sendkeys ("NUMLOCK")


Application.Sendkeys {NUMLOCK}

最佳答案

您可以通过几个 Windows API 调用直接设置 key 状态。从 MSDN page for keybd_event function 移植:

#If VBA7 Then
    Private Declare PtrSafe Sub keybd_event Lib "user32.dll" (ByVal bVk As Byte, ByVal bScan As Byte, _
                                                              ByVal dwFlags As LongPtr, ByVal dwExtraInfo As LongPtr)
    Private Declare PtrSafe Function GetKeyboardState Lib "user32.dll" (ByVal lpKeyState As LongPtr) As Boolean
#Else
    Private Declare Sub keybd_event Lib "user32.dll" (ByVal bVk As Byte, ByVal bScan As Byte, _
                                                      ByVal dwFlags As Long, ByVal dwExtraInfo As Long)
    Private Declare Function GetKeyboardState Lib "user32.dll" (ByVal lpKeyState As Long) As Boolean
#End If

Private Const KEYEVENTF_EXTENDEDKEY As Long = &H1
Private Const KEYEVENTF_KEYUP As Long = &H2
Private Const VK_NUMLOCK As Byte = &H90
Private Const NumLockScanCode As Byte = &H45

Private Sub ToggleNumlock(enabled As Boolean)
    Dim keystate(255) As Byte
    'Test current keyboard state.
    GetKeyboardState (VarPtr(keystate(0)))
    If (Not keystate(VK_NUMLOCK) And enabled) Or (keystate(VK_NUMLOCK) And Not enabled) Then
        'Send a keydown
        keybd_event VK_NUMLOCK, NumLockScanCode, KEYEVENTF_EXTENDEDKEY, 0&
        'Send a keyup
        keybd_event VK_NUMLOCK, NumLockScanCode, KEYEVENTF_EXTENDEDKEY Or KEYEVENTF_KEYUP, 0&
    End If
End Sub

像这样调用它:
Sub Example()
    'Turn Numlock off.
    ToggleNumlock False
    'Turn Numlock on.
    ToggleNumlock True
End Sub

10-06 10:42