Question

VB中怎样检测鼠标键盘动作？

比如，鼠标或键盘动一下，就会产生XXX事件，代码怎么写？

Answer 1

鼠标可以触发mousemove 、MouseDown、MouseUp事件。
键盘可以触发keydown、keypress、keyup事件。

Answer 2

mousemove

Answer 3

'用 API 函数配合控件 Timer1，不管活动窗口是那一个，也不管是不是本程序窗口，都能检测键盘和鼠标状态
'运行后，请留意本窗口标题栏给出的信息
Private Declare Function GetAsyncKeyState Lib "user32" (ByVal vKey As Long) As Integer
Private Declare Function GetCursorPos& Lib "user32" (lpPoint As PointAPI)
Private Type PointAPI
X As Long: Y As Long
End Type
Dim ctTimer As Single

Private Sub Form_Load()
Timer1.Enabled = True: Timer1.Interval = 100
End Sub

Private Sub Timer1_Timer()
Dim T As Single
T = Format(Timer - ctTimer, "0.0")
If KeyOrMouse() Then T = 0: ctTimer = Timer
Me.Caption = "鼠标和键盘未动时间：" & T & " 秒"
End Sub
Private Function KeyOrMouse() As Boolean
Static x0 As Long, y0 As Long
Dim nMouse As PointAPI, I As Long, dl As Long

'检测鼠标 是否移动
Call GetCursorPos(nMouse) '获取当前鼠标位置
If x0 <> nMouse.X Or y0 <> nMouse.Y Then KeyOrMouse = True
x0 = nMouse.X: y0 = nMouse.Y
If KeyOrMouse Then Exit Function

'检测键盘 是否按动
For I = 0 To 255
dl = GetAsyncKeyState(I)
If dl <> 0 Then KeyOrMouse = True: Exit Function
Next
End Function