SubClassing Form_Move() event

I am able to subclass my form and create a move event. However I don't know how to stop the form from being moved after its left property is let say 1000? For now it looks like the user can drag it beyond the 1000 point (it comes back to 1000 but it looks ugly - I want to stop it completely).
Thanks for ANY help.

[V(ery) Basic]

I've seen this done somewhere before:

'WARNING: IF THIS CODE DOES NOT WORK DO NOT KILL / MAME / 
'MUTILATE / INJUR ME

Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (dest As Any, source As Any, ByVal numBytes As Long)

Type POINTAPI
    X As Long
    Y As Long
End Type

Type MINMAXINFO
    ptReserved As POINTAPI
    ptMaxSize As POINTAPI
    ptMaxPosition As POINTAPI
    ptMinTrackSize As POINTAPI
    ptMaxTrackSize As POINTAPI
End Type

'Subclassing
'Blah, blah
Case WM_GETMINMAXINFO
        ' Windows is querying the window for its MinMaxInfo
        'As the name so cleverly suggests
        Dim mmInfo As MINMAXINFO, Whatever As Long
        CopyMemory mmInfo, ByVal lParam, Len(mmInfo)            
        With mmInfo
             .ptMaxTrackSize.X = 400 'Max Width (Pixels)
             .ptMaxTrackSize.Y = 400 'Max Height (Pixels)
             .ptMinTrackSize.X = 100 'Min width (Pixels)
             .ptMinTrackSize.Y = 100 'Min Height (Pixels)
             .ptMaxPosition.X = 0 'Coords when maximised (X)
             .ptMaxPosition.Y = 0 'Coords when maximised (Y)
             .ptMaxSize = .ptMaxTrackSize 'Sets the max 
             'size when the Max-button is pressed to equal
             'the max size while manually sizing
        End With
        CopyMemory ByVal lParam, mmInfo, Len(mmInfo)

'Keep subclassing

Hope this is pretty self-explanatory,

me

quote:
Originally posted by V(ery) Basic

'WARNING: IF THIS CODE DOES NOT WORK DO NOT KILL / MAME /
'MUTILATE / INJUR ME

BUT I HAVE TO. I HAD SUCH NICE PLANS. I WANTED TO DO SO MUCH WITH THAT CODE. AND WHAT YOU GAVE ME???? NOTHING you [beep][beep][beep][crying].

But now seriously. It doesn't stop the form from being moved beyond a certain point on the screen. It works for setting the left and top coordinates while in the maximized mode, but not for moving the form (and I use the exact same code for stopping the resize event).
So ANY ideas are still being accepted

Thanks for help V(ery) Basic

[Sam Finch]

This Works

Option Explicit

Private Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
Private Declare Function CallWindowProc Lib "user32" Alias "CallWindowProcA" (ByVal lpPrevWndFunc As Long, ByVal hwnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (Destination As Any, Source As Any, ByVal Length As Long)
Private Type WINDOWPOS
        hwnd As Long
        hWndInsertAfter As Long
        x As Long
        y As Long
        cx As Long
        cy As Long
        flags As Long
End Type
Private Const WM_WINDOWPOSCHANGING = &H46


Dim hDefWinProc As Long

Public Sub Subclass(hwnd As Long)
hDefWinProc = SetWindowLong(hwnd, -4, AddressOf WndProc)
End Sub

Public Function WndProc(ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long

Dim apiNewPosition As WINDOWPOS
WndProc = CallWindowProc(hDefWinProc, hwnd, wMsg, wParam, lParam)


If wMsg = WM_WINDOWPOSCHANGING Then

    Call CopyMemory(apiNewPosition, ByVal lParam, LenB(apiNewPosition))
    
    If apiNewPosition.x > 200 Then _
        apiNewPosition.x = 200
        
    If apiNewPosition.y > 200 Then _
        apiNewPosition.y = 200
        
    Call CopyMemory(ByVal lParam, apiNewPosition, LenB(apiNewPosition))
    
End If



End Function

The problem still occurs. The method you've posted is very similar to WM_MOVE event I've created. It allows the user to move an outline of a window to any place, but doesn't move the window. I want to stop the user from moving the outline.
Thanks for your help so far