.NET Programmatically invoke screenclick doesn't work?
- by ropstah
I'm trying to programmatically invoke an onclick event however the click is not received/handled. Am I missing something, or is security preventing the click to be executed?
I have a forms application which is invisible. Basically I would like to say:
DoDoubleClick(wait, x, y)
This should raise two click (mousedown+mouseup) events on screen with the specified wait interval. However the click isn't received in a Flash application in Firefox (which is running at that moment).
Here's my code:
Form:
Public Class Form1
Private WithEvents gmh As GlobalMouseHook
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
gmh = New GlobalMouseHook()
Me.Visible = false
gmh.DoDoubleClick(50, 800, 600)
End Sub
Private Sub Form1_FormClosed(ByVal sender As System.Object, ByVal e As System.Windows.Forms.FormClosedEventArgs) Handles MyBase.FormClosed
gmh.Dispose()
End Sub
Private Sub gmh_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles gmh.MouseDown
End Sub
Private Sub gmh_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles gmh.MouseMove
End Sub
Private Sub gmh_MouseUp(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles gmh.MouseUp
End Sub
End Class
GlobalMouseHook class:
Friend Class GlobalMouseHook
Implements IDisposable
Private hhk As IntPtr = IntPtr.Zero
Private disposedValue As Boolean = False
Public Event MouseDown As MouseEventHandler
Public Event MouseUp As MouseEventHandler
Public Event MouseMove As MouseEventHandler
Public Sub New()
Hook()
End Sub
Private Sub Hook()
Dim hInstance As IntPtr = LoadLibrary("User32")
hhk = SetWindowsHookEx(WH_MOUSE_LL, AddressOf Me.HookProc, hInstance, 0)
End Sub
Private Sub Unhook()
UnhookWindowsHookEx(hhk)
End Sub
Public Sub DoDoubleClick(ByVal wait As Integer, ByVal x As Integer, ByVal y As Integer)
RaiseEvent MouseDown(Me, New MouseEventArgs(MouseButtons.Left, 1, x, y, 0))
RaiseEvent MouseUp(Me, Nothing)
System.Threading.Thread.Sleep(wait)
RaiseEvent MouseDown(Me, New MouseEventArgs(MouseButtons.Left, 1, x, y, 0))
RaiseEvent MouseUp(Me, Nothing)
End Sub
Private Function HookProc(ByVal nCode As Integer, ByVal wParam As UInteger, ByRef lParam As MSLLHOOKSTRUCT) As Integer
If nCode >= 0 Then
Select Case wParam
Case WM_LBUTTONDOWN
RaiseEvent MouseDown(Me, New MouseEventArgs(MouseButtons.Left, 0, lParam.pt.x, lParam.pt.y, 0))
Case WM_RBUTTONDOWN
RaiseEvent MouseDown(Me, New MouseEventArgs(MouseButtons.Right, 0, lParam.pt.x, lParam.pt.y, 0))
Case WM_MBUTTONDOWN
RaiseEvent MouseDown(Me, New MouseEventArgs(MouseButtons.Middle, 0, lParam.pt.x, lParam.pt.y, 0))
Case WM_LBUTTONUP, WM_RBUTTONUP, WM_MBUTTONUP
RaiseEvent MouseUp(Nothing, Nothing)
Case WM_MOUSEMOVE
RaiseEvent MouseMove(Nothing, Nothing)
Case WM_MOUSEWHEEL, WM_MOUSEHWHEEL
Case Else
Console.WriteLine(wParam)
End Select
End If
Return CallNextHookEx(hhk, nCode, wParam, lParam)
End Function
Private Structure API_POINT
Public x As Integer
Public y As Integer
End Structure
Private Structure MSLLHOOKSTRUCT
Public pt As API_POINT
Public mouseData As UInteger
Public flags As UInteger
Public time As UInteger
Public dwExtraInfo As IntPtr
End Structure
Private Const WM_MOUSEWHEEL As UInteger = &H20A
Private Const WM_MOUSEHWHEEL As UInteger = &H20E
Private Const WM_MOUSEMOVE As UInteger = &H200
Private Const WM_LBUTTONDOWN As UInteger = &H201
Private Const WM_LBUTTONUP As UInteger = &H202
Private Const WM_MBUTTONDOWN As UInteger = &H207
Private Const WM_MBUTTONUP As UInteger = &H208
Private Const WM_RBUTTONDOWN As UInteger = &H204
Private Const WM_RBUTTONUP As UInteger = &H205
Private Const WH_MOUSE_LL As Integer = 14
Private Delegate Function LowLevelMouseHookProc(ByVal nCode As Integer, ByVal wParam As UInteger, ByRef lParam As MSLLHOOKSTRUCT) As Integer
Private Declare Auto Function LoadLibrary Lib "kernel32" (ByVal lpFileName As String) As IntPtr
Private Declare Auto Function SetWindowsHookEx Lib "user32.dll" (ByVal idHook As Integer, ByVal lpfn As LowLevelMouseHookProc, ByVal hInstance As IntPtr, ByVal dwThreadId As UInteger) As IntPtr
Private Declare Function CallNextHookEx Lib "user32" (ByVal hhk As IntPtr, ByVal nCode As Integer, ByVal wParam As UInteger, ByRef lParam As MSLLHOOKSTRUCT) As Integer
Private Declare Function UnhookWindowsHookEx Lib "user32" (ByVal hhk As IntPtr) As Boolean
' IDisposable
Protected Overridable Sub Dispose(ByVal disposing As Boolean)
If Not Me.disposedValue Then
If disposing Then
' TODO: free other state (managed objects).
End If
Unhook()
End If
Me.disposedValue = True
End Sub
' This code added by Visual Basic to correctly implement the disposablepattern.
Public Sub Dispose() Implements IDisposable.Dispose
' Do not change this code. Put cleanup code in Dispose(ByValdisposing As Boolean) above.
Dispose(True)
GC.SuppressFinalize(Me)
End Sub
End Class
