Is there a API to capture mouse movement ?

What I want is the trigger an event whenever the user move or click with the mouse no matter where the pointer is something like to halt the screensaver back to desktop.

Thanks.

This should help you.

Code:

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Option Explicit

Private Declare Function SetTimer Lib "user32" (ByVal hWnd As Long, ByVal nIDEvent As Long, ByVal uElapse As Long, ByVal lpTimerFunc As Long) As Long
Private Declare Function KillTimer Lib "user32" (ByVal hWnd As Long, ByVal nIDEvent As Long) As Long

Private Declare Function GetMessage Lib "user32" Alias "GetMessageA" (lpMsg As Msg, ByVal hWnd As Long, ByVal wMsgFilterMin As Long, ByVal wMsgFilterMax As Long) As Long
Private Declare Function TranslateMessage Lib "user32" (lpMsg As Msg) As Long
Private Declare Function DispatchMessage Lib "user32" Alias "DispatchMessageA" (lpMsg As Msg) As Long

Private Declare Sub Sleep Lib "kernel32" (ByVal dwMilliseconds As Long)

Const WM_KEYDOWN = &H100
Const WM_KEYFIRST = &H100
Const WM_KEYLAST = &H108
Const WM_KEYUP = &H101
Const WM_LBUTTONDBLCLK = &H203
Const WM_LBUTTONDOWN = &H201
Const WM_LBUTTONUP = &H202
Const WM_RBUTTONDBLCLK = &H206
Const WM_RBUTTONDOWN = &H204
Const WM_RBUTTONUP = &H205
Const WM_MBUTTONDBLCLK = &H209
Const WM_MBUTTONDOWN = &H207
Const WM_MBUTTONUP = &H208
Const WM_MOUSEMOVE = &H200

Private Type POINTAPI
  X As Long
  Y As Long
End Type

Private Type Msg
  hWnd As Long
  message As Long
  wParam As Long
  lParam As Long
  time As Long
  pt As POINTAPI
End Type
   
Dim lEventHandle As Long
Dim aMsg As Msg

Sub Start()
  lEventHandle = SetTimer(0, 0, 10, AddressOf MyTimer)
End Sub

Sub MyTimer(ByVal hWnd As Long, ByVal lngMsg As Long, ByVal lngID As Long, ByVal lngTime As Long)
  KillTimer 0, lEventHandle  'Kill timer
  Do While GetMessage(aMsg, 0, 0, 0) 'Gets the message
    TranslateMessage aMsg 'translates it to something
    DispatchMessage aMsg  'sends the message on to the system
    Select Case aMsg.message
      Case 275, 280:
      Case WM_KEYFIRST To WM_KEYLAST:
      Case WM_MOUSEMOVE:
      Case WM_LBUTTONDOWN:
        MsgBox "LeftMouseDown"
      Case WM_RBUTTONDOWN:
        MsgBox "RightMouseDown"
      Case WM_LBUTTONUP:
        MsgBox "LeftMouseUp"
      Case WM_RBUTTONUP:
        MsgBox "RightMouseUp"
      Case Else:
    End Select
    Sleep 0&
  Loop 'Loops until program is closed ( i think )
End Sub

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Thomas, I tried your code and it works fine but can you please tell me how can I use it so it can detect mouse no mather where it is (On external applications?)
Thanks

Where the Case LBUTTONDOWN you should be able to put your code there. I think it will trigger within your program as well as in external programs. Just do something like this:

Code:

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Case WM_MOUSEMOVE:
  Msgbox "You just moved your mouse."
  Exit Loop 'to exit the loop
Case WM_LBUTTONDOWN:
  Msgbox "You pressed the left mousebutton"
  Exit Loop 'to exit the loop

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I am afraid it dos not work on external applications.