Scroll "java window" via VB

'Window Messages

WM_MOUSEMOVE = &H200       ' 512
WM_LBUTTONDOWN = &H201   ' 513
WM_LBUTTONUP = &H202         ' 514
WM_LBUTTONDBLCLK = &H203   ' 515
WM_RBUTTONDOWN = &H204    ' 516
WM_RBUTTONUP = &H205         ' 517
WM_RBUTTONDBLCLK = &H206   ' 518
WM_MBUTTONDOWN = &H207   ' 519
WM_MBUTTONUP = &H208        ' 520
WM_MBUTTONDBLCLK = &H209  ' 521
WM_MOUSEWHEEL = &H20A      ' 522


User 'shimanov' posted a sample how to send mouse scrolls
to window under mouse.

It should work under Win98+
-But the sample is in Delphi :


URL:
http://www.autohotkey.com/forum/topic6772.html



*********************************************************************************************
WheelUp::
MouseGetPos, m_x, m_y
hw_m_target := DllCall( "WindowFromPoint", "int", m_x, "int", m_y )

; WM_MOUSEWHEEL
; WHEEL_DELTA = 120
SendMessage, 0x20A, 120 << 16, ( m_y << 16 )|m_x,, ahk_id %hw_m_target%
return
*********************************************************************************************



*********************************************************************************************
WheelDown::
MouseGetPos, m_x, m_y
hw_m_target := DllCall( "WindowFromPoint", "int", m_x, "int", m_y )

; WM_MOUSEWHEEL
; WHEEL_DELTA = 120
SendMessage, 0x20A, -120 << 16, ( m_y << 16 )|m_x,, ahk_id %hw_m_target%
return
*********************************************************************************************

Now i translated user shimanov's code to vb6 (see working sample below).

With the sample i can send a "virtual_mouse_wheel_rotation"
to the window under the mouse.

The vb6 sample works with notepad, word, IE and other programs.

-But as you mentioned - it doesn't work with a Java created window. So your answer
is correct, and i'll give you the 500 points.




Needs:
==========
1 Timer


Private Declare Function WindowFromPoint Lib "user32" (ByVal xPoint As Long, ByVal yPoint As Long) As Long
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long

Private Declare Function GetCursorPos Lib "user32" (lpPoint As POINTAPI) As Long

Private Type POINTAPI
x As Long
y As Long
End Type

Const WHEEL_DELTA = 120: Const WM_MOUSEWHEEL = &H20A
Dim Pt As POINTAPI

Private Sub Form_Load()
    Timer1.Interval = 977
End Sub



Private Sub Timer1_Timer()
    GetCursorPos Pt
    hw_m_target = WindowFromPoint(Pt.x, Pt.y)
    Caption = Pt.x & " " & Pt.y & " " & hw_m_target
    m_x = Pt.x + 10: m_y = Pt.y

Dim lParam As Long, wParam As Long

'Value_of_the_low_order_word_of_wParam:
wParam_low_Part% = 0 'low Word =Send a virtual [Shift,CTRL] Left_mouse button,Middle_mouse button,Right_mouse button

'Value_of_the_high_order_word_of_wParam:
'wParam_high_Part% =  1 * WHEEL_DELTA 'send_mouse_wheel_rotation UP      [+1] = scroll up
 wParam_high_Part% = -1 * WHEEL_DELTA 'send_mouse_wheel_rotation DOWN [-1] = scroll dwn

    wParam& = wParam_low_Part + wParam_high_Part * 2 ^ 16
    SendMessage hw_m_target, WM_MOUSEWHEEL, wParam, lParam
End Sub